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NCEA Level 1 Pūtaiao study materials
NCEA Level 1 Pūtaiao study resources

NCEA Level 1 Pūtaiao practice questions

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Question 1Pūtaiao 92071 (Kete Manarua / TAPā)

In pūtaiao, a kaitiaki approach to investigating a local stream emphasises which of the following?

  1. Combining mātauranga Māori observations with scientific measurements to monitor the mauri of the awa Correct answer.
  2. Reporting findings only to the school so the community is not involved
  3. Leaving the stream untouched so that no human influence affects the results
  4. Recording only the chemical measurements that can be compared with national databases

Explanation

A kaitiaki approach weaves mātauranga Māori (local observation, whakapapa connections, historical knowledge) together with scientific measurements so that monitoring reflects both the health of the ecosystem and the mauri of the awa. Decisions about the investigation are made with the community, not for it.

Question 2Pūtaiao 92071 (Kete Manarua / TAPā)

A group of ākonga measure the temperature of a local river at three sites. Which practice best protects the reliability of their comparison?

  1. Taking each reading at a different depth and time of day
  2. Taking readings at the same depth and time of day at all sites Correct answer.
  3. Averaging the readings without recording the individual values
  4. Using a different thermometer at each site

Explanation

Reliability in environmental monitoring depends on controlling variables that could affect the measurement. Temperature varies with depth and time of day, so keeping both constant across sites means differences can be attributed to the sites rather than to the method.

Question 3Pūtaiao 92071 (Kete Manarua / TAPā)

Which statement best describes the role of whakapapa in a pūtaiao investigation of a ngahere?

  1. It identifies the genealogical connections between people, plants, animals and the whenua that shape how the investigation is framed Correct answer.
  2. It is a statistical test for comparing two sets of measurements
  3. It is a sampling technique used to count the number of trees in a quadrat
  4. It is the name given to the safety checklist before fieldwork

Explanation

Whakapapa describes relationships and connections across generations, linking people to the living and non-living world. In a pūtaiao investigation it shapes the questions asked, who is involved and how findings are interpreted.

Question 4Pūtaiao 92071 (Kete Manarua / TAPā)

A class is investigating how riparian planting affects stream clarity. Which variable should be deliberately changed between their study sites?

  1. The type of clarity tube used
  2. The depth at which the sample is taken
  3. The time of day the samples are collected
  4. The amount of riparian vegetation along the bank Correct answer.

Explanation

The independent variable is the one the investigator deliberately changes, here the amount of riparian vegetation. All other factors must be kept constant to make a fair comparison.

Question 5Pūtaiao 92071 (Kete Manarua / TAPā)

Which of these is the best example of a secondary source of scientific information about a local catchment?

  1. A published regional council report on catchment water quality Correct answer.
  2. A photograph you took of the stream bank
  3. Your own field notebook from a site visit
  4. A water sample you collected and tested yourself

Explanation

A secondary source is information gathered by someone else, such as a published council report or a peer-reviewed article. Primary data are collected first-hand by the investigator.

Question 6Pūtaiao 92071 (Kete Manarua / TAPā)

A student writes: 'The stream near our kura is polluted.' Which revision turns this into a scientifically useful statement for a pūtaiao report?

  1. Our stream has a mean turbidity of 45 NTU, above the 25 NTU guideline for healthy streams Correct answer.
  2. The stream is very polluted and looks bad
  3. The stream is polluted because it is near a road
  4. Everyone agrees the stream is polluted

Explanation

Scientific statements are supported by quantitative evidence and compared against a recognised benchmark. Including a measured value and a guideline makes the claim testable and specific.

Question 7Pūtaiao 92071 (Kete Manarua / TAPā)

Which of the following best explains why a pūtaiao investigation might use both qualitative and quantitative observations?

  1. Qualitative observations are required by law in environmental reports
  2. Each type of observation provides different evidence that together gives a fuller picture of the ecosystem Correct answer.
  3. Quantitative data are always more accurate than qualitative data
  4. Qualitative observations are only useful when equipment is unavailable

Explanation

Quantitative data measure amounts, while qualitative observations describe features such as colour, smell or behaviour. Combining them gives richer evidence than either alone.

Question 8Pūtaiao 92071 (Kete Manarua / TAPā)

A kaitiaki monitoring group wants to know whether their stream is improving over five years. Which approach gives the strongest evidence?

  1. Comparing the stream with a different stream in another region
  2. Repeated sampling at the same sites using the same methods each season Correct answer.
  3. One sample taken at the end of the five-year period
  4. A single survey of residents asking if the stream looks cleaner

Explanation

Detecting change over time requires repeated measurements at consistent sites and times, using the same methods so that differences reflect real change. Seasonal repetition also accounts for natural variation.

Question 9Pūtaiao 92071 (Kete Manarua / TAPā)

A student measures the pH of a stream sample three times and gets 7.2, 7.3 and 7.2. What does this pattern indicate?

  1. The measurements are both accurate and imprecise
  2. The measurements are precise but may still be inaccurate Correct answer.
  3. The measurements are accurate but not precise
  4. The measurements cannot be evaluated without more repeats

Explanation

Precision refers to how close repeated measurements are to each other, while accuracy refers to how close they are to the true value. These three readings cluster tightly, showing good precision, but accuracy cannot be judged without a known reference.

Question 10Pūtaiao 92071 (Kete Manarua / TAPā)

A report on a local awa states that macroinvertebrate diversity decreased after a storm. Which explanation best fits this finding?

  1. Diversity always decreases in summer
  2. The decrease was caused by the students using a different net
  3. Macroinvertebrates migrate upstream before every storm
  4. Stormwater runoff carried sediment and pollutants into the stream, degrading habitat for sensitive species Correct answer.

Explanation

Storms can wash sediment, nutrients and contaminants from land into waterways, smothering habitat and reducing oxygen. Sensitive macroinvertebrate taxa are often the first to decline, making them useful indicators.

Question 11Pūtaiao 92071 (Kete Manarua / TAPā)

Which of the following is the most appropriate way to present the results of a five-site stream health survey so that patterns are easy to compare?

  1. A table listing raw measurements without units
  2. A list of the students' favourite sites
  3. A bar graph of mean values with error bars and labelled axes Correct answer.
  4. A paragraph describing each site in turn

Explanation

A bar graph with labelled axes and error bars displays the mean for each site and shows the variability of the data, allowing patterns and differences to be compared quickly.

Question 12Pūtaiao 92071 (Kete Manarua / TAPā)

A group finds that a stream with more shade has cooler water than an unshaded stream. Which conclusion is best supported by this evidence?

  1. Temperature has no effect on stream ecology
  2. Cooler water always has more oxygen than warmer water
  3. The shaded stream is cleaner than the unshaded stream
  4. Shade causes cooler water temperatures in this stream Correct answer.

Explanation

The evidence shows an association between shade and cooler temperatures, and the mechanism (shade reduces solar heating) supports a causal link in this context. Conclusions should stay close to what the data show.

Question 13Pūtaiao 92071 (Kete Manarua / TAPā)

Why is it important for a pūtaiao investigation to consider the mauri of a river alongside chemical measurements?

  1. Mauri captures the holistic wellbeing of the river, including cultural, ecological and spiritual dimensions that numbers alone may miss Correct answer.
  2. Mauri can be measured with a pH meter
  3. Cultural considerations replace the need for scientific data
  4. Chemical measurements are always wrong

Explanation

Mauri refers to the life force and overall wellbeing of a river, encompassing cultural, ecological and spiritual dimensions. A pūtaiao approach recognises that scientific measurements and mauri provide complementary understandings.

Question 14Pūtaiao 92071 (Kete Manarua / TAPā)

An investigation aims to test whether adding native plants to a stream bank reduces erosion. Which of the following is the dependent variable?

  1. The amount of bank erosion measured Correct answer.
  2. The type of soil at the site
  3. The number of native plants added
  4. The slope of the bank

Explanation

The dependent variable is what is measured in response to the change, here the amount of erosion. The number of plants is the independent variable, and soil type and slope are controlled variables.

Question 15Pūtaiao 92071 (Kete Manarua / TAPā)

Two students disagree about whether a stream is healthy. One points to clear water and abundant fish; the other points to high nitrate readings. Which statement best reflects a pūtaiao approach to resolving this?

  1. Both lines of evidence should be considered together, as clear water and fish presence may mask nutrient enrichment Correct answer.
  2. The students should choose the answer that matches their initial hypothesis
  3. The visual observations should be ignored because they are not scientific
  4. The high nitrate reading proves the stream is unhealthy and no other evidence matters

Explanation

Different forms of evidence can point in different directions, and a robust conclusion weighs them together. Clear water and fish may coexist with elevated nutrients, so nutrient data and ecological observations should both inform the judgement.

Question 16Pūtaiao 92071 (Kete Manarua / TAPā)

Which of these sampling methods is most appropriate for estimating the abundance of small ground-dwelling invertebrates in a ngahere?

  1. Pitfall traps set in a grid and checked regularly Correct answer.
  2. Counting birds flying overhead
  3. Measuring the height of the tallest trees
  4. Testing the soil pH at one spot

Explanation

Pitfall traps placed in a grid sample ground-active invertebrates across an area, and regular checking allows abundance to be estimated. The grid reduces bias compared with a single trap.

Question 17Pūtaiao 92071 (Kete Manarua / TAPā)

A student calculates that the mean of five turbidity readings is 30 NTU, but one reading of 90 NTU is much higher than the rest. What is the most appropriate next step?

  1. Replace the high reading with the average of the others
  2. Investigate the high reading to check for a measurement error or a real local event before deciding how to treat it Correct answer.
  3. Report the mean only and ignore the spread
  4. Discard the high reading without comment

Explanation

An outlier should be investigated before it is removed, because it may reflect a real event such as a disturbance or a genuine pollution source. Removing or replacing it without checking would distort the data.

Question 18Pūtaiao 92071 (Kete Manarua / TAPā)

Which statement correctly describes a difference between mātauranga Māori and Western scientific knowledge in the context of environmental monitoring?

  1. Western science has no connection to cultural values
  2. Mātauranga Māori cannot be used to inform environmental decisions
  3. Mātauranga Māori is only concerned with the past
  4. Mātauranga Māori is passed down orally and through practice, while Western science typically reports through written peer-reviewed publications Correct answer.

Explanation

Mātauranga Māori is transmitted through oral tradition, practice and relationships with the whenua, while Western science typically communicates through written, peer-reviewed channels. Both can inform environmental decisions and are dynamic, not confined to the past.

Question 19Pūtaiao 92071 (Kete Manarua / TAPā)

A class wants to compare water clarity at two sites but one site is much deeper and faster-flowing. Which approach best improves the fairness of the comparison?

  1. Sample only the fast-flowing site because it is more interesting
  2. Use a different method at each site to suit the conditions
  3. Take multiple samples at matched depths and positions at both sites and record flow conditions Correct answer.
  4. Compare the sites using only one sample each

Explanation

Matching depth and sampling position, and recording flow, reduces the influence of confounding factors so that differences in clarity can be more confidently linked to the sites. Multiple samples also improve reliability.

Question 20Pūtaiao 92071 (Kete Manarua / TAPā)

A report claims that planting trees along a stream will 'definitely restore all native fish within one year'. Which criticism of this claim is most valid?

  1. It is too cautious about the timescale of ecological change
  2. It uses too many technical terms
  3. It makes an absolute prediction without evidence and ignores the time needed for ecological recovery Correct answer.
  4. It does not mention the species of tree

Explanation

Scientific claims should be proportionate to the evidence and acknowledge uncertainty. Predicting complete restoration within a fixed short time ignores the gradual nature of ecological recovery and the many factors involved.

Question 21Pūtaiao 92071 (Kete Manarua / TAPā)

In a pūtaiao investigation, a rōpū decides to seek guidance from local kaumātua before sampling a culturally significant site. What is the main purpose of this step?

  1. To ensure the investigation respects tikanga and local knowledge associated with the site Correct answer.
  2. To replace the need for scientific measurements
  3. To make the investigation take longer
  4. To obtain equipment for sampling

Explanation

Consulting kaumātua ensures that the investigation follows tikanga and draws on local mātauranga, which is central to a culturally appropriate pūtaiao approach. It complements rather than replaces scientific measurement.

Question 22Pūtaiao 92071 (Kete Manarua / TAPā)

A student argues that because two variables are correlated, one must cause the other. Which scenario best shows the flaw in this reasoning?

  1. Ice cream sales and drowning deaths both rise in summer because of hot weather Correct answer.
  2. Increased rainfall leads to higher stream flow
  3. Lower temperatures increase dissolved oxygen in water
  4. Adding fertiliser increases plant growth in a controlled trial

Explanation

A correlation can arise from a third confounding variable. Ice cream sales and drownings both increase in summer because hot weather drives both, so neither causes the other.

Question 23Pūtaiao 92071 (Kete Manarua / TAPā)

A monitoring programme finds that a stream's invertebrate community is dominated by pollution-tolerant taxa such as worms and midge larvae, with few mayflies or stoneflies. What is the most reasonable interpretation?

  1. The result is meaningless because worms are not invertebrates
  2. The community composition suggests organic pollution or low oxygen, since sensitive taxa are absent Correct answer.
  3. The stream is in excellent health because invertebrates are abundant
  4. The stream must be too cold for any invertebrates

Explanation

Macroinvertebrate taxa differ in their tolerance to pollution and low oxygen. Dominance by tolerant taxa and the absence of sensitive mayflies and stoneflies indicate degraded conditions, even if total numbers are high.

Question 24Pūtaiao 92071 (Kete Manarua / TAPā)

Two groups monitor the same stream. Group A samples only at the outflow below a farm; Group B samples at the outflow and at an upstream reference site. Which statement best explains why Group B's design is stronger?

  1. Group B can compare impacted and reference conditions, helping separate human impact from natural variation Correct answer.
  2. Group A's data are invalid because they were collected below a farm
  3. Group B collects more samples, so their data are automatically accurate
  4. Group B's design removes the need for repeated sampling

Explanation

A reference site provides a baseline against which the impacted site can be compared, helping to distinguish human impacts from natural background variation. This is a stronger design than sampling a single potentially impacted location.

Question 25Pūtaiao 92071 (Kete Manarua / TAPā)

A pūtaiao report concludes that a stream's mauri has been degraded. Which combination of evidence would most strongly support this conclusion?

  1. A rise in water temperature recorded once in summer
  2. Loss of sensitive macroinvertebrate taxa, reduced clarity, and kaitiaki observations of changed flow and diminished fish presence Correct answer.
  3. A decrease in the number of visitors to the stream
  4. A single high turbidity reading taken after heavy rain

Explanation

Mauri encompasses the holistic wellbeing of the river, so evidence from multiple dimensions (ecological indicators, water quality and cultural observations) gives the strongest support. A single reading or unrelated measure is insufficient.

Question 26Pūtaiao 92071 (Kete Manarua / TAPā)

In a pūtaiao investigation of a local awa, a rōpū records water temperature, flow rate and the number of mayfly larvae at each site. Which term best describes the number of mayfly larvae in this study?

  1. The dependent variable Correct answer.
  2. The independent variable
  3. The sampling error
  4. A controlled variable

Explanation

The dependent variable is the quantity measured as the outcome of the investigation, and here the mayfly count is what the rōpū records to compare sites. The independent variable is what the investigators deliberately choose or vary, such as site location, while controlled variables are kept constant.

Question 27Pūtaiao 92071 (Kete Manarua / TAPā)

A kairangahau measures the water clarity of an awa at the same site, same depth and same time of day on five consecutive days. Why does repeating the measurement in this way strengthen the investigation?

  1. It guarantees that the measurements are accurate
  2. It reduces the influence of one-off fluctuations and shows whether the pattern is consistent Correct answer.
  3. It removes the need for a control site
  4. It proves that clarity is caused by land use

Explanation

Repeated measurements under matched conditions show whether a result is stable or simply a one-off fluctuation, which supports the reliability of the data. Repetition improves confidence in the pattern but does not by itself guarantee accuracy or establish causation.

Question 28Pūtaiao 92071 (Kete Manarua / TAPā)

Which statement best describes the purpose of a hypothesis in a pūtaiao investigation?

  1. A final conclusion written after all data are analysed
  2. A summary of what other researchers have published
  3. A list of the equipment needed for fieldwork
  4. A testable prediction that links a proposed explanation to evidence that could support or refute it Correct answer.

Explanation

A hypothesis is a testable prediction or proposed explanation that generates observable evidence capable of supporting or refuting it. It is stated before or early in data collection, not after the analysis is complete.

Question 29Pūtaiao 92071 (Kete Manarua / TAPā)

A rōpū wants to know whether the mauri of a stream has been affected by a new drain. Which action best reflects a pūtaiao approach to this question?

  1. Combine water quality data with observations and knowledge shared by local tangata whenua about the stream Correct answer.
  2. Ignore cultural knowledge because it cannot be graphed
  3. Survey only the students in the class about how the stream looks
  4. Rely only on a single chemical test taken once

Explanation

A pūtaiao approach values both measurable environmental data and mātauranga Māori held by tangata whenua, so combining them gives a fuller picture of the stream's mauri. A single test or a narrow survey cannot capture the state of the awa.

Question 30Pūtaiao 92071 (Kete Manarua / TAPā)

Which of the following is the best example of a qualitative observation in a stream health study?

  1. The stream width was 2.3 metres
  2. The turbidity reading was 45 NTU
  3. The water temperature was 14.5 °C
  4. The water looked cloudy and had a faint oily sheen on the surface Correct answer.

Explanation

Qualitative observations describe qualities perceived by the senses, such as appearance or smell, without assigning a number. Measurements such as NTU, temperature and width are quantitative because they produce numerical values.

Question 31Pūtaiao 92071 (Kete Manarua / TAPā)

A student records that a stream's flow rate is 0.4 m/s and writes the unit after the number. Why is including the unit important in a pūtaiao report?

  1. It proves the result is reliable
  2. It makes the number more precise than it really is
  3. It shows that the measurement was repeated
  4. It tells the reader what quantity was measured and makes the value comparable with other data Correct answer.

Explanation

A unit identifies the physical quantity and scale being used, so a value can be understood and compared with other measurements. Without units the number alone is ambiguous.

Question 32Pūtaiao 92071 (Kete Manarua / TAPā)

A class uses a kick-net to sample macroinvertebrates at a stream site. Which step best protects the health of the awa and the organisms during sampling?

  1. Return the invertebrates to the stream at the same site after identifying and counting them Correct answer.
  2. Keep all specimens in a bucket until the end of the term
  3. Wash the net in detergent before each sample
  4. Sample the same small pool repeatedly until it is empty

Explanation

Returning organisms to the same site after counting minimises harm and keeps the local population intact, which aligns with kaitiakitanga. Detergents, long captivity and exhausting one pool all damage the habitat or the organisms.

Question 33Pūtaiao 92071 (Kete Manarua / TAPā)

Which of these is a primary source of data for a pūtaiao investigation about rubbish in a local reserve?

  1. Counts and photographs the rōpū collected during their own survey of the reserve Correct answer.
  2. A textbook chapter on recycling in general
  3. A friend's opinion shared on social media
  4. A news article about rubbish in a city far away

Explanation

Primary data are collected firsthand by the investigators for their own question, such as their own counts and photographs. Secondary sources and opinions describe other contexts or are not direct evidence about this reserve.

Question 34Pūtaiao 92071 (Kete Manarua / TAPā)

A rōpū measures dissolved oxygen at a stream site three times and gets 8.1, 8.0 and 8.2 mg/L. They then measure at a second site and get 5.5, 5.4 and 5.6 mg/L. What is the most reasonable interpretation?

  1. The first site consistently has higher dissolved oxygen than the second Correct answer.
  2. The two sites have the same dissolved oxygen
  3. The second site must be polluted by sewage
  4. The readings at the first site are unreliable because they vary

Explanation

Both sets of readings are tightly grouped, so the consistent difference between sites is a real pattern in the data. Small variation within each set does not make the readings unreliable.

Question 35Pūtaiao 92071 (Kete Manarua / TAPā)

A student wants to compare invertebrate numbers between a shaded and an unshaded reach of the same stream. Which design best controls the variables?

  1. Sample whichever reach is easiest to access on the day
  2. Sample the shaded reach five times and the unshaded reach once
  3. Sample both reaches on the same day with the same net, same sampling time and similar depth and flow Correct answer.
  4. Sample the shaded reach in winter and the unshaded reach in summer

Explanation

Keeping sampling date, gear, effort and habitat conditions similar means the main difference between reaches is shading, so any difference in invertebrates can be attributed to it. Confounding factors such as season, effort or access would weaken the comparison.

Question 36Pūtaiao 92071 (Kete Manarua / TAPā)

A report states that a stream's turbidity rose sharply after heavy rain. Which explanation best accounts for this observation?

  1. Invertebrates became more active and stirred up the bed
  2. Runoff carried soil and sediment from the catchment into the stream Correct answer.
  3. The stream's temperature increased during the rain
  4. Rainwater is naturally more turbid than stream water

Explanation

Heavy rain increases surface runoff, which transports soil and sediment from the surrounding catchment into waterways and raises turbidity. This is a well-established link between rainfall and sediment input.

Question 37Pūtaiao 92071 (Kete Manarua / TAPā)

A kairangahau records that a stream site has abundant kōura and mayfly larvae. What does this community most likely indicate about the site?

  1. The water is relatively clean and well oxygenated Correct answer.
  2. The water is heavily polluted with nutrients
  3. The site has very high salinity
  4. The stream has stopped flowing

Explanation

Kōura and mayfly larvae are sensitive to pollution and low oxygen, so their abundance suggests clean, well-oxygenated water. Pollution-tolerant species such as worms would dominate a degraded site instead.

Question 38Pūtaiao 92071 (Kete Manarua / TAPā)

A rōpū wants to present the relationship between stream shade and water temperature across ten sites. Which presentation is most suitable?

  1. A single paragraph describing each site in turn
  2. A table listing only the site names
  3. A pie chart of the site names
  4. A scatter graph with shade on the horizontal axis and temperature on the vertical axis Correct answer.

Explanation

A scatter graph displays paired numerical values and makes the relationship between two continuous variables visible. Tables or prose can hold data but do not show the trend as clearly, and a pie chart suits parts of a whole.

Question 39Pūtaiao 92071 (Kete Manarua / TAPā)

During fieldwork, a student notices that a stream bank has slumping soil and exposed roots. Which follow-up measurement would best test whether bank erosion is occurring?

  1. Record the colour of the water
  2. Mark fixed points on the bank and measure how far the bank edge moves over several weeks Correct answer.
  3. Count the number of fish in the stream
  4. Measure the water temperature at midday

Explanation

Measuring the movement of fixed bank markers over time directly quantifies erosion. The other options measure different variables that do not track bank loss.

Question 40Pūtaiao 92071 (Kete Manarua / TAPā)

Two rōpū investigate the same awa. One uses a standard macroinvertebrate index, the other uses a questionnaire asking visitors how clean the water looks. Why might the two groups reach different conclusions?

  1. The stream changed completely between the two studies
  2. They are measuring different things, so each result reflects a different aspect of stream condition Correct answer.
  3. Questionnaires are always more accurate than indices
  4. One group must have made a calculation error

Explanation

An invertebrate index measures ecological condition, while a perception questionnaire measures people's impressions, so the two can legitimately differ. Different methods answer different questions rather than one being automatically wrong.

Question 41Pūtaiao 92071 (Kete Manarua / TAPā)

A student claims that because more rubbish was counted near the bridge, the bridge causes people to litter. Which statement best evaluates this claim?

  1. The claim is valid because correlation always shows causation
  2. The count shows an association, but other factors such as foot traffic or bin placement could explain it Correct answer.
  3. The claim is proven because the count is numerical
  4. The claim is false because litter cannot be counted

Explanation

A correlation between location and litter does not establish causation, because other variables such as visitor numbers or the availability of bins may explain the pattern. Further evidence would be needed to support a causal claim.

Question 42Pūtaiao 92071 (Kete Manarua / TAPā)

A rōpū plans to sample a culturally significant spring. Which action best reflects appropriate engagement before sampling begins?

  1. Consult with local tangata whenua to understand protocols and seek permission Correct answer.
  2. Sample secretly so no one objects
  3. Sample immediately to avoid delays
  4. Publish the site location before consulting anyone

Explanation

Consulting tangata whenua respects cultural protocols and the mauri of the site, and it helps the rōpū design sampling that is acceptable and appropriate. Sampling without consent or consultation can cause harm and breach trust.

Question 43Pūtaiao 92071 (Kete Manarua / TAPā)

A student calculates the mean of four turbidity readings as 25 NTU, but one reading was 70 NTU and the others were close to 10 NTU. What does this pattern suggest?

  1. The mean is wrong because means cannot include high values
  2. The stream is definitely polluted
  3. The high reading may be an outlier that should be checked before it is included Correct answer.
  4. The other three readings should be discarded

Explanation

A single value far from the rest may be an outlier caused by a measurement error or a real event, so it should be checked before deciding whether to include it. Discarding valid data without reason or assuming pollution would be premature.

Question 44Pūtaiao 92071 (Kete Manarua / TAPā)

A monitoring group wants its stream health results to be trusted by the local council. Which action most strengthens the credibility of their data?

  1. Use different methods each month to keep it interesting
  2. Collect samples only when the stream looks clean
  3. Follow a documented method, calibrate instruments and record the date, site and conditions for each sample Correct answer.
  4. Report only the results that match their expectations

Explanation

Documented methods, calibrated instruments and complete metadata make results reproducible and verifiable, which builds trust. Selective sampling or reporting biases the data and undermines credibility.

Question 45Pūtaiao 92071 (Kete Manarua / TAPā)

A group finds that sites with more riparian planting have lower water temperature. Which conclusion is best supported by this evidence?

  1. Riparian planting is the only factor affecting water temperature
  2. Water temperature causes riparian planting to grow
  3. No conclusion can be drawn from field data
  4. Riparian planting is associated with cooler water, though other factors may also contribute Correct answer.

Explanation

The data show an association between planting and cooler water, which is consistent with shade reducing heat input, but observational data cannot rule out other contributing factors. A cautious conclusion reflects the strength of the evidence.

Question 46Pūtaiao 92071 (Kete Manarua / TAPā)

A rōpū wants to know whether a stream's water quality differs above and below a farm discharge. Which sampling plan best addresses this question?

  1. Collect samples from a different stream each week
  2. Collect matched samples upstream and downstream on the same days, using the same methods Correct answer.
  3. Collect one sample downstream only
  4. Collect samples upstream only

Explanation

Comparing matched upstream and downstream samples on the same days isolates the effect of the discharge while controlling for weather and season. Single-site or unrelated sampling cannot support that comparison.

Question 47Pūtaiao 92071 (Kete Manarua / TAPā)

A report claims that a new stormwater pipe caused a decline in native fish. Which additional evidence would most strengthen this causal claim?

  1. An opinion from a resident that fish seem fewer
  2. A photograph of the pipe
  3. A single fish count taken after the pipe was installed
  4. Fish counts from before and after the pipe was installed at the same site, with other conditions documented Correct answer.

Explanation

Before-and-after data from the same site, with other conditions recorded, provide a temporal comparison that supports a causal link. A single post-installation count, a photograph or an opinion lacks the baseline needed for that inference.

Question 48Pūtaiao 92071 (Kete Manarua / TAPā)

A rōpū finds that a stream's invertebrate community is dominated by worm-like taxa and has very few sensitive species. Which interpretation is best supported?

  1. The result cannot be interpreted without fish data
  2. The site is likely degraded, because tolerant taxa dominate where sensitive species cannot survive Correct answer.
  3. The site is pristine, because invertebrates are present
  4. The stream is definitely toxic to all life

Explanation

A community dominated by pollution-tolerant taxa and lacking sensitive species is a recognised signal of degraded conditions. The presence of some invertebrates does not indicate good health, and fish data are not required for this interpretation.

Question 49Pūtaiao 92071 (Kete Manarua / TAPā)

Two groups monitor the same awa. Group A samples only below a farm discharge; Group B samples above and below the discharge on the same days. Which statement best explains why Group B's design gives stronger evidence?

  1. Group B's design removes all measurement error
  2. Group B has a comparison baseline that helps separate the discharge's effect from other variation Correct answer.
  3. Group A's results are invalid because they were collected below a farm
  4. Group A took more samples, so its data must be better

Explanation

Sampling above and below the discharge provides an upstream baseline, so changes can be attributed to the discharge rather than to seasonal or weather variation. Group A's single location lacks that comparison, though its data are not automatically invalid.

Question 50Pūtaiao 92071 (Kete Manarua / TAPā)

In a pūtaiao investigation, a kairangahau uses the Māori concept of kaitiakitanga to guide their fieldwork. What does kaitiakitanga most directly describe in this context?

  1. The method of recording observations in a field notebook
  2. The obligation to care for and protect the environment for future generations Correct answer.
  3. The process of measuring physical and chemical water parameters
  4. The right to harvest any natural resource found within a rohe

Explanation

Kaitiakitanga is the principle of guardianship, describing the responsibility people hold to look after te taiao and pass it on in good health. In a pūtaiao investigation it shapes how a kairangahau treats a site, not which instrument they use.