Claim, Evidence, Reasoning (CER) in Science
A Grade 5 science worksheet focusing on developing Claim, Evidence, and Reasoning skills through various scientific scenarios.
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Claim, Evidence, Reasoning (CER) in Science
Name:
Date:
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Read each scenario carefully. For each scenario, identify the Claim, provide Evidence to support your claim, and explain your Reasoning. Use complete sentences.
Scenario: Two identical plants were placed in different locations. Plant A was placed by a window and watered daily. Plant B was placed in a dark closet and watered daily. After one week, Plant A was tall and green, while Plant B was yellow and wilting.
1. Claim: What do you think caused the difference in plant growth?
2. Evidence: What observations from the scenario support your claim?
3. Reasoning: Explain why your evidence supports your claim using scientific principles.
Scenario: A student placed an ice cube on a metal tray and another identical ice cube on a plastic tray. Both trays were left on a counter at room temperature. The ice cube on the metal tray melted much faster.
4. What is the most likely reason the ice cube on the metal tray melted faster?
Metal is a better insulator than plastic.
Plastic is a better conductor of heat than metal.
Metal conducts heat better than plastic.
The color of the tray affected the melting rate.
5. Which statement is the best evidence for your answer to question 4?
The ice cubes were identical.
Both trays were at room temperature.
The ice cube on the metal tray melted faster.
Some liquids melt faster than others.
Scenario: A scientist observed different types of seeds. Some seeds had parachute-like structures, others were found inside fleshy fruits, and some had hooks that clung to fur.
6. Claim: The different structures of seeds are adaptations for .
7. Evidence: Seeds with parachute-like structures are dispersed by . Seeds in fleshy fruits are dispersed by . Seeds with hooks are dispersed by .
8. Reasoning: These structures help the seeds move away from the parent plant, reducing for resources and increasing the chances of in new locations.
Scenario: A geologist found layers of rock with fossils of ancient marine animals in a desert.
9. Claim: The desert was once covered by an ocean.
True
False
10. Evidence: The presence of marine fossils in the rocky layers supports the claim.
True
False