Choosing the Right Word for the Science Report
Students are writing a one-paragraph report on an experiment in which bean seeds were grown in light and in darkness. A draft contains these word choices:
- "The seeds in the dark grew very big." (the data show they grew tall and pale, but weak)
- "The light made the plants healthy." (the data show they were greener and sturdier)
- "The dark plants were kind of weird."
- "We used a lot of seeds." (the method section says 20 seeds per group) The teacher's vocabulary goal is precision: students should replace vague intensifiers and informal judgments with words that match the data. Two students protest that "very big" and "kind of weird" are not wrong, just less formal. The teacher must decide how to respond and how to grade the vocabulary strand.
1. For each of the four underlined choices, explain why it is imprecise in this report and propose a replacement.
Read the worked answer
"Very big" is imprecise because it does not say which dimension changed. The data show increased height but weak stems, so "big" could mean tall, thick, or heavy. Replacement: "grew taller but had weak, pale stems."
"Healthy" is an interpretation rather than an observation. The data describe color and sturdiness, not health. Replacement: "produced greener, sturdier plants."
"Kind of weird" is an informal judgment with no observable referent. Replacement: state what was observed, for example "were pale and had thin stems."
"A lot of" is vague when an exact count exists. Replacement: "20 seeds per group."
In each case the replacement is better because a reader could check it against the data. The students are right that the originals are not grammatically wrong; the problem is that they are not verifiable, which is the standard for a report.
2. Respond to the students' protest that the original words are 'not wrong, just less formal.'
Read the worked answer
Acknowledge the part they got right: the words are grammatical, and in a text message or a story, "very big" and "kind of weird" would be fine. The issue is not formality but function. A report's job is to let another person check what you saw. "Very big" does not tell the reader what to measure; "kind of weird" does not tell the reader what to look for.
A useful comparison: if a classmate read only "the dark plants were kind of weird," could they repeat the observation and get the same result? No. If they read "the dark plants were pale with thin stems," they could check. That test, not a rule about formal versus informal, is what makes the revision necessary.
This framing avoids telling students their everyday language is bad, which invites resistance, and instead gives them a purpose-based reason to revise.
3. Propose how the vocabulary strand should be scored within a 20-point report grade.
Read the worked answer
Allocate 5 of the 20 points to vocabulary precision, with three components: (1) 2 points for replacing vague quantity words with exact figures where the method provides them; (2) 2 points for using observable descriptors instead of judgments in the results section; (3) 1 point for consistent use of the same term for the same thing (for example, not switching between "dark group" and "no-light plants").
The remaining 15 points cover content accuracy, organization, and mechanics, so vocabulary does not overwhelm the grade. This split reflects the actual goal: the report is primarily a science task, and vocabulary is judged by whether it makes the observations checkable. A student who writes "very big" loses at most 1 point under component 2, which is proportionate, while a student who invents a number not in the data should lose the full 2 points under component 1, because that is a factual error rather than a style choice.