Claim, Evidence, Reasoning (CER) Practice

Claim, Evidence, Reasoning (CER) Practice

Read each scenario carefully. For each question, identify the Claim, provide relevant Evidence, and explain your Reasoning.

Scenario: Two identical plants were grown in different conditions. Plant A received sunlight for 8 hours a day, while Plant B received sunlight for 4 hours a day. Both plants received the same amount of water and soil. After two weeks, Plant A was significantly taller and had more leaves than Plant B.

1. Claim: What factor is most responsible for the difference in plant growth?

2. Evidence: What data from the scenario supports your claim?

3. Reasoning: Explain how your evidence supports your claim, using scientific principles.

Scenario: A student mixed two clear liquids, Liquid X and Liquid Y, in a beaker. After mixing, the solution turned cloudy and a white solid settled at the bottom. The temperature of the beaker also increased.

4. Which of the following is the best claim for what occurred in the beaker?

5. Provide evidence from the scenario to support your claim for question 4.

6. Provide reasoning to connect your evidence to your claim for question 4.

Scenario: A scientist observed a specific type of plant that produces seeds with small, hook-like structures. These seeds are often found attached to the fur of animals that pass through the plant's habitat.

7. Claim: How are the seeds of this plant primarily dispersed?

8. Evidence: What observations support your claim?

9. Reasoning: Explain how the seed's structure and animal interaction lead to its dispersal.