Year 9 Science · Unit 4 · Lesson 5
Apply Worksheet
Learning Goals
True or False? Fix the false ones
Circle T or F for each statement. If the statement is false, rewrite it correctly on the line below.
A claim on its own, with no evidence attached, is already a complete conclusion.
Correct it:
Evidence is the specific data from an investigation, such as actual measurements.
Correct it:
Reasoning is the part of a conclusion that explains how the evidence supports the claim.
Correct it:
After testing one plant type once, it is fine to conclude that all plants behave the same way.
Correct it:
Investigation data
A class tested how the temperature of water affects how quickly a fizzing tablet fully dissolves. Everything else (tablet brand, water volume, stirring) was kept the same. They recorded the dissolving time at four temperatures.
| Water temperature (°C) | 10 | 20 | 30 | 40 |
|---|---|---|---|---|
| Time to fully dissolve (s) | 95 | 72 | 54 | 38 |
(a) Write a claim that answers the question "Does water temperature affect how quickly the tablet dissolves?"
(b) Write the evidence from the table that supports your claim. Quote at least two numbers with their units.
(c) Write the reasoning that links your evidence to your claim. Explain how the numbers show the pattern.
1. Using the table, would it be fair to conclude "this tablet dissolves instantly in hot water above 60°C"? Explain why or why not.
2. A student wrote: "The tablet dissolved well." Explain why this is not strong evidence, and rewrite it as proper evidence using the data.
Wrap Up
In one sentence, what was the main idea of this lesson?