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BW PSLE Social Studies study materials
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BW PSLE Social Studies practice questions

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Question 1Geography and the Environment

Which of these is a natural resource that cannot be replaced once it is used up?

  1. Sunlight
  2. Wind
  3. Rainwater
  4. Coal Correct answer.

Explanation

Coal is a fossil fuel formed over millions of years, so the amount stored in the ground is fixed and is used up faster than it forms. Wind, sunlight and rainwater are continually renewed by natural cycles. This is why coal is called a non-renewable resource.

Question 2Geography and the Environment

Which activity is the main cause of deforestation in tropical countries?

  1. Clearing forest for farmland and timber Correct answer.
  2. Planting trees along roads
  3. Collecting rainwater
  4. Building wind turbines

Explanation

Forests are mostly cleared when land is converted to farmland, cattle pasture or plantations, and when trees are cut for timber. These activities remove large areas of forest permanently. Tree planting and renewable energy projects do not remove forests.

Question 3Geography and the Environment

What is the main reason coastal cities in Southeast Asia flood more often during heavy rain?

  1. The sea is always calm there
  2. Land is low-lying and drains slowly Correct answer.
  3. There are too many hills
  4. The ground is mostly rocky

Explanation

Many coastal cities are built on low, flat land close to sea level, so rainwater drains away slowly and can back up when the sea is high. The combination of low elevation and poor drainage makes flooding more likely. Rocky or hilly terrain would actually help water drain away faster.

Question 4Geography and the Environment

Which of these describes the climate of a place?

  1. The wind speed this morning
  2. The temperature at noon yesterday
  3. The average weather pattern over many years Correct answer.
  4. The weather in a place today

Explanation

Climate is the long-term average pattern of weather in a place, usually measured over thirty years or more. Weather, by contrast, is the condition of the atmosphere at a particular time. A single day's temperature or wind is weather, not climate.

Question 5Geography and the Environment

Which of these is a renewable source of energy?

  1. Petroleum
  2. Diesel
  3. Solar power Correct answer.
  4. Natural gas

Explanation

Solar power comes from sunlight, which is continuously available and is not used up when we generate electricity. Natural gas, petroleum and diesel are fossil fuels with limited supplies. Fossil fuels take millions of years to form, so they are non-renewable.

Question 6Geography and the Environment

What is the main purpose of recycling paper?

  1. To change the colour of paper
  2. To reduce the number of trees cut down Correct answer.
  3. To increase the amount of waste
  4. To make paper heavier

Explanation

Recycling paper turns used paper into new paper products, which reduces the need for fresh wood pulp. Fewer trees then need to be cut down, and less waste goes to landfills. Weight, waste quantity and colour are not the aims of recycling.

Question 7Geography and the Environment

Which of these is an example of water pollution?

  1. Waves breaking on a beach
  2. Factory waste flowing into a river Correct answer.
  3. Clouds forming over the sea
  4. Rain falling into a reservoir

Explanation

Water pollution happens when harmful substances enter a water body and make it unsafe for living things. Untreated factory waste flowing into a river adds chemicals that harm fish and plants. Natural processes such as rainfall, cloud formation and waves do not add pollutants.

Question 8Geography and the Environment

A town near the sea experiences a steady breeze blowing from the sea toward the land during the day. What causes this?

  1. The Moon pulls the air toward the land
  2. The sea is always warmer than the land
  3. The wind always blows from east to west
  4. The land heats up faster than the sea during the day Correct answer.

Explanation

During the day the land warms faster than the sea, so air above the land rises and cooler air from the sea moves in to replace it. This creates a sea breeze. The Moon affects tides, not daily coastal breezes.

Question 9Geography and the Environment

A country has a large population and a small amount of farmland. Which problem is most likely?

  1. Too much food being wasted
  2. Too few people to work in factories
  3. A shortage of housing in rural areas
  4. Difficulty producing enough food for its people Correct answer.

Explanation

When farmland is limited but the population is large, the land cannot produce enough food to feed everyone. The country may then need to import food. The other options do not follow from having many people and little farmland.

Question 10Geography and the Environment

Why do many large cities in Southeast Asia face traffic congestion?

  1. Buses are not allowed in cities
  2. Population and cars grow faster than roads Correct answer.
  3. Roads are closed every afternoon
  4. Most people live in rural villages

Explanation

Rapid population growth and rising car ownership increase the number of vehicles on the road. When road building and public transport cannot keep pace, congestion results. The other options describe situations that do not describe most cities.

Question 11Geography and the Environment

Which of these best explains why the greenhouse effect has increased in recent decades?

  1. The Earth has moved closer to the Sun
  2. The Moon has become brighter
  3. More greenhouse gases have been released by human activity Correct answer.
  4. The oceans have stopped moving

Explanation

Burning fossil fuels and clearing forests release extra carbon dioxide and other greenhouse gases. These gases trap more heat in the atmosphere, strengthening the greenhouse effect. The Earth's distance from the Sun and the Moon's brightness have not changed in a way that explains this.

Question 12Geography and the Environment

A farmer plants the same crop in the same field every year. Which result is most likely?

  1. The field will become a forest
  2. Soil nutrients will be depleted Correct answer.
  3. The soil will become richer
  4. The crop will need no water

Explanation

Growing the same crop repeatedly takes the same nutrients from the soil each season, so those nutrients are used up faster than they are replaced. Farmers often rotate crops or add fertiliser to restore soil fertility. The other results do not follow from this practice.

Question 13Geography and the Environment

Why is a mangrove forest valuable along a tropical coast?

  1. It blocks all shipping
  2. It produces drinking water
  3. It protects the coast from erosion and waves Correct answer.
  4. It stops rainfall

Explanation

Mangrove roots slow down waves and hold soil in place, reducing coastal erosion and protecting the land behind them. They also provide habitats for fish and other wildlife. They do not block all shipping, produce drinking water or stop rain.

Question 14Geography and the Environment

A city wants to reduce the amount of waste sent to landfills. Which action would most directly achieve this?

  1. Importing more goods
  2. Building more landfills
  3. Burning all waste in the open
  4. Encouraging reuse and recycling Correct answer.

Explanation

Reusing items and recycling materials keeps them out of landfills, so less waste needs to be buried. Building more landfills adds capacity rather than reducing waste, and open burning causes air pollution. Importing more goods would likely increase waste.

Question 15Geography and the Environment

Which of these is the best example of a non-renewable resource being used?

  1. Burning coal in a power station Correct answer.
  2. Using a water wheel in a river
  3. Using a solar panel on a roof
  4. Collecting rainwater in a tank

Explanation

Coal is a fossil fuel that formed over millions of years and cannot be replaced quickly, so burning it uses up a non-renewable resource. Solar panels, water wheels and rainwater collection all rely on sources that are naturally renewed.

Question 16Geography and the Environment

Two towns are at the same latitude, but one is on the coast and the other is far inland. Which difference is most likely?

  1. The coastal town has no seasons
  2. The coastal town has a smaller temperature range Correct answer.
  3. The inland town has no rainfall
  4. The inland town is always colder at noon

Explanation

The sea warms and cools more slowly than land, so coastal places tend to have milder summers and winters. This gives a smaller temperature range than inland places at the same latitude. Inland places still have seasons and can receive rain.

Question 17Geography and the Environment

What is the main reason some countries build desalination plants?

  1. To reduce the amount of water available
  2. To increase rainfall
  3. To turn seawater into fresh water Correct answer.
  4. To cool the ocean

Explanation

Desalination removes salt from seawater so that it can be used for drinking or farming. Countries with little fresh water, such as some in the Middle East, rely on it. It does not increase rainfall or cool the ocean, and it adds to rather than reduces water supply.

Question 18Geography and the Environment

A country builds a dam across a major river. Which change is most likely downstream of the dam?

  1. Higher rainfall in the delta
  2. Stronger tides in the delta
  3. More sediment reaching the delta
  4. Less sediment reaching the delta Correct answer.

Explanation

A dam traps sediment that would otherwise be carried downstream by the river. As a result, less sediment reaches the delta, which can cause the delta to shrink or erode. Dams do not change rainfall or tides in the delta.

Question 19Geography and the Environment

Which of these best describes sustainable development?

  1. Meeting present needs without harming future generations Correct answer.
  2. Building only in cities
  3. Using all resources as quickly as possible
  4. Stopping all economic activity

Explanation

Sustainable development balances economic growth, social needs and environmental protection so that resources remain available for future generations. It does not mean stopping all activity, and it is not limited to cities. Using resources as fast as possible is the opposite of sustainability.

Question 20Geography and the Environment

Which of these is the most likely effect of rising sea levels on low-lying island nations?

  1. Colder average temperatures
  2. Greater risk of coastal flooding Correct answer.
  3. Fewer storms in the region
  4. More land becoming available for farming

Explanation

When sea levels rise, low-lying coastal land is more easily flooded, especially during storms and high tides. Some island nations may lose land or need to relocate people. Rising seas do not create farmland or reduce storms.

Question 21Geography and the Environment

A region has heavy rainfall for several months followed by a dry season. How does this pattern most likely affect local rivers?

  1. Rivers dry up completely in the wet season
  2. River flow is high in the wet season and low in the dry season Correct answer.
  3. River flow stays exactly the same all year
  4. Rivers flow backwards in the dry season

Explanation

Rivers are fed by rainfall, so their flow rises during the wet season and falls in the dry season. This seasonal pattern can cause floods in the wet months and water shortages later. Rivers do not normally dry up during heavy rain or flow backwards.

Question 22Geography and the Environment

Which combination of factors would most likely make a place have a hot and dry desert climate?

  1. High latitude and cold ocean currents
  2. Mountain tops with snow
  3. Low pressure, coastal location and heavy rain
  4. High pressure, inland location and little rainfall Correct answer.

Explanation

Deserts often form where sinking air under high pressure keeps skies clear and rain scarce, and an inland location far from moist ocean winds adds to the dryness. These conditions together create hot, dry climates. Low pressure and heavy rain, cold high latitudes or snowy peaks produce very different climates.

Question 23Geography and the Environment

A coastal city builds a sea wall and also restores mangroves along its shore. Why is this combined approach more effective than a sea wall alone?

  1. Mangroves make the sea wall stronger
  2. The wall increases the height of the tides
  3. Mangroves stop all rain from falling
  4. The wall blocks waves while mangroves absorb energy and reduce erosion Correct answer.

Explanation

A sea wall provides a hard barrier against waves, while mangroves act as a natural buffer that absorbs wave energy and holds soil in place. Together they protect the coast at different levels of risk and also provide habitat. Mangroves do not strengthen the wall itself, and neither feature controls rain or tides.

Question 24Geography and the Environment

A government wants to reduce air pollution in a crowded city. Which policy would most directly reduce pollution from vehicles?

  1. Expanding public transport and cycling routes Correct answer.
  2. Encouraging more people to drive alone
  3. Removing all bus services
  4. Lowering the price of petrol

Explanation

Expanding public transport and cycling routes gives people alternatives to private cars, so fewer vehicles emit pollutants. Lowering fuel prices and encouraging solo driving would increase car use. Removing bus services would force more people into cars.

Question 25Geography and the Environment

Why can clearing a steep hillside of trees increase the risk of landslides during heavy rain?

  1. Trees normally block rivers
  2. Trees make the rain heavier
  3. Cleared land attracts more sunlight
  4. Tree roots no longer hold the soil together Correct answer.

Explanation

Tree roots bind soil and rock, helping to keep the slope stable. When trees are removed, rainwater soaks into loose soil more easily and the slope can give way. Trees do not control how heavy rain is, and sunlight or river blocking does not explain landslides.

Question 26Geography and the Environment

Which of these is a renewable resource?

  1. Coal
  2. Petroleum
  3. Solar energy Correct answer.
  4. Natural gas

Explanation

Renewable resources are naturally replenished on a human timescale. Solar energy is continuously supplied by the sun and will not run out, unlike fossil fuels such as coal, natural gas, and petroleum, which took millions of years to form.

Question 27Geography and the Environment

What is the main cause of soil erosion on farmland?

  1. Planting cover crops
  2. Terracing slopes
  3. Building windbreaks
  4. Removing vegetation Correct answer.

Explanation

Vegetation protects soil by holding it in place with roots and reducing the impact of rain and wind. When vegetation is removed, soil is exposed and can be washed or blown away more easily. The other practices help prevent erosion.

Question 28Geography and the Environment

Which of these is a natural cause of climate change?

  1. Deforestation
  2. Burning fossil fuels
  3. Volcanic eruptions Correct answer.
  4. Industrial emissions

Explanation

Volcanic eruptions release gases and particles that can temporarily affect climate. The other options are human activities that release greenhouse gases and are major drivers of recent climate change.

Question 29Geography and the Environment

What is the primary source of energy that drives the water cycle?

  1. The sun Correct answer.
  2. The moon
  3. Geothermal heat
  4. Wind

Explanation

The sun provides the heat that causes water to evaporate from oceans, lakes, and soil. This evaporation is the first step in the water cycle, which then leads to condensation, precipitation, and collection.

Question 30Geography and the Environment

Which of these is a way to conserve water at home?

  1. Watering the garden at noon
  2. Taking long showers
  3. Leaving taps running
  4. Fixing leaky pipes Correct answer.

Explanation

Fixing leaky pipes stops water from being wasted continuously. Long showers, running taps, and watering at noon (when evaporation is high) all use water inefficiently.

Question 31Geography and the Environment

Which of these is a non-renewable resource?

  1. Timber
  2. Coal Correct answer.
  3. Wind
  4. Sunlight

Explanation

Coal is a fossil fuel that took millions of years to form and is being used much faster than it is replenished. Wind, sunlight, and timber (when managed sustainably) are renewable.

Question 32Geography and the Environment

What is the main reason for the formation of acid rain?

  1. High winds
  2. Pollutants from burning fossil fuels Correct answer.
  3. Volcanic ash
  4. Excessive sunlight

Explanation

Acid rain forms when sulfur dioxide and nitrogen oxides, released mainly by burning fossil fuels, react with water vapor in the atmosphere to form acids. These acids then fall to the ground in rain, snow, or fog.

Question 33Geography and the Environment

Which of these is a benefit of planting trees in a city?

  1. They decrease biodiversity
  2. They increase air pollution
  3. They cause more flooding
  4. They reduce the urban heat island effect Correct answer.

Explanation

Trees provide shade and release water vapor through transpiration, which cools the air. They also absorb pollutants and improve air quality, helping to reduce the urban heat island effect.

Question 34Geography and the Environment

A country experiences frequent earthquakes. Which of these is the most likely reason?

  1. It has a hot climate
  2. It is densely populated
  3. It has many rivers
  4. It is located near a tectonic plate boundary Correct answer.

Explanation

Earthquakes are most common near tectonic plate boundaries where plates collide, separate, or slide past each other, causing stress to build up and release. Climate, rivers, and population density do not directly cause earthquakes.

Question 35Geography and the Environment

Why do coastal areas often have milder temperatures than inland areas at the same latitude?

  1. Coastal areas have more mountains
  2. Coastal areas receive more rainfall
  3. The ocean heats and cools more slowly than land Correct answer.
  4. Inland areas are closer to the sun

Explanation

Water has a higher heat capacity than land, so it absorbs and releases heat more slowly. This moderates coastal temperatures, keeping them cooler in summer and warmer in winter compared to inland areas.

Question 36Geography and the Environment

A city wants to reduce its contribution to climate change. Which action would be most effective?

  1. Increasing deforestation
  2. Building more coal power plants
  3. Switching to renewable energy sources Correct answer.
  4. Encouraging car use

Explanation

Switching to renewable energy sources such as solar and wind reduces the burning of fossil fuels and the release of greenhouse gases. This directly lowers the city's carbon footprint.

Question 37Geography and the Environment

Why is it important to protect wetlands?

  1. They are good for building factories
  2. They provide habitats and filter water Correct answer.
  3. They increase flooding
  4. They use up groundwater

Explanation

Wetlands support high biodiversity, act as natural filters that improve water quality, and absorb floodwaters. They also store carbon, making them valuable for both people and wildlife.

Question 38Geography and the Environment

What is the main reason for the formation of deserts?

  1. Lack of moisture Correct answer.
  2. Cold temperatures
  3. Excessive vegetation
  4. High population density

Explanation

Deserts are defined by their dryness, receiving very little precipitation. This lack of moisture limits plant growth and creates arid conditions, regardless of temperature.

Question 39Geography and the Environment

A farmer wants to reduce soil erosion on a sloping field. Which method would be most effective?

  1. Increasing the use of chemical fertilizers
  2. Leaving the field bare
  3. Terracing the slope Correct answer.
  4. Planting crops in rows up and down the slope

Explanation

Terracing creates level steps on a slope, which slows down water runoff and allows water to soak into the soil, reducing erosion. The other options either increase erosion or do not address it.

Question 40Geography and the Environment

Why do some rivers have a lower water level in summer?

  1. Higher evaporation and lower rainfall Correct answer.
  2. Melting snow
  3. Increased rainfall
  4. Less water use by plants

Explanation

In summer, higher temperatures increase evaporation from rivers and soil, and many regions receive less rainfall. This combination reduces river flow and lowers water levels.

Question 41Geography and the Environment

Which of these is a consequence of deforestation?

  1. Reduced soil erosion
  2. Increased greenhouse gases Correct answer.
  3. Increased biodiversity
  4. More stable water cycles

Explanation

Deforestation reduces the number of trees that absorb carbon dioxide, and burning or decomposing trees releases stored carbon. This increases the concentration of greenhouse gases in the atmosphere.

Question 42Geography and the Environment

What is the main purpose of a water treatment plant?

  1. To remove pollutants from water Correct answer.
  2. To increase water pollution
  3. To generate electricity
  4. To store water for irrigation

Explanation

Water treatment plants clean water by removing contaminants such as bacteria, chemicals, and debris, making it safe for drinking or for release into the environment.

Question 43Geography and the Environment

Which of these best explains why some areas have a rain shadow?

  1. Mountains block moist air, causing dryness on the leeward side Correct answer.
  2. Cold ocean currents cause evaporation
  3. Cities generate more heat
  4. Warm air rises and cools

Explanation

When moist air is forced over a mountain range, it cools and releases precipitation on the windward side. As the air descends on the leeward side, it warms and dries, creating a rain shadow with little rainfall.

Question 44Geography and the Environment

Why is it important to reduce, reuse, and recycle waste?

  1. To conserve resources and reduce pollution Correct answer.
  2. To increase landfill space
  3. To use more energy
  4. To create more waste

Explanation

Reducing, reusing, and recycling waste conserves natural resources, saves energy, and reduces pollution and the amount of waste sent to landfills. These practices support sustainable living.

Question 45Geography and the Environment

A small island nation is concerned about rising sea levels. Which adaptation strategy would best protect its coastal communities?

  1. Encouraging construction on beaches
  2. Increasing greenhouse gas emissions
  3. Removing coastal vegetation
  4. Building sea walls and restoring mangroves Correct answer.

Explanation

Sea walls provide a physical barrier against waves and storm surges, while mangroves absorb wave energy and stabilize shorelines. Together they form a more resilient coastal defense.

Question 46Geography and the Environment

Which of these is a likely effect of a prolonged drought on a region?

  1. More hydroelectric power
  2. Lower food prices
  3. Increased crop yields
  4. Water shortages Correct answer.

Explanation

A drought reduces water availability in rivers, reservoirs, and groundwater, leading to water shortages for drinking, agriculture, and industry. It can also cause crop failures and higher food prices.

Question 47Geography and the Environment

Why does urbanization often lead to increased flooding?

  1. Impermeable surfaces replace soil Correct answer.
  2. Rainfall decreases
  3. More green spaces are created
  4. More trees are planted

Explanation

Urban development covers soil with concrete and asphalt, which are impermeable and prevent water from soaking into the ground. This increases surface runoff, which can overwhelm drainage systems and cause flooding.

Question 48Geography and the Environment

Which of these best explains the formation of a hurricane?

  1. Cold, dry air over land
  2. Warm ocean water and moist air Correct answer.
  3. High mountains
  4. Cold ocean currents

Explanation

Hurricanes form over warm ocean waters (typically above 26°C) where moist air rises, condenses, and releases latent heat. This energy fuels the storm, while the Coriolis effect causes it to rotate.

Question 49Geography and the Environment

A country wants to reduce its carbon footprint. Which policy would be most effective?

  1. Investing in public transportation Correct answer.
  2. Increasing coal exports
  3. Subsidizing fossil fuel industries
  4. Encouraging deforestation

Explanation

Investing in public transportation reduces the number of private vehicles on the road, lowering emissions from fossil fuel combustion. This directly decreases a country's carbon footprint.

Question 50Geography and the Environment

Why is biodiversity important for an ecosystem?

  1. It decreases ecosystem services
  2. It increases resilience to environmental changes Correct answer.
  3. It reduces the number of species
  4. It makes ecosystems less stable

Explanation

High biodiversity means many different species with varied roles, which makes an ecosystem more resilient to disturbances such as disease, climate change, or natural disasters. If one species is affected, others can help maintain ecosystem functions.