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Grade 8 · Science · Building Confidence

Free Science Concepts and Evidence worksheet - version 12

Grade 8 science practice based on published U.S. learning expectations, with reproducible original variations. This printable version includes 8 grade-appropriate questions and a separate answer sheet.

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Science Concepts and Evidence

Grade 8 · Building confidence · 8 questions · Version PG-B23TM1-1751

1.

What is a wave's frequency?A. The number of cycles per unit time B. They rearrange into new substances C. Speed with direction D. Conduction

2.

What happens to atoms during a chemical reaction?A. They rearrange into new substances B. Force, mass, and acceleration C. Conduction D. Repel

3.

What does Newton's second law relate?A. Force, mass, and acceleration B. Repel C. The number of cycles per unit time D. Conduction

4.

What is evidence of a chemical change?A. Total mass is conserved B. Speed with direction C. Repel D. Formation of a new substance

5.

How is mass affected in a closed-system reaction?A. The number of cycles per unit time B. Speed with direction C. Repel D. Total mass is conserved

6.

What do like electric charges do?A. Repel B. The number of cycles per unit time C. Conduction D. They rearrange into new substances

7.

What transfers thermal energy by direct contact?A. Conduction B. Repel C. Force, mass, and acceleration D. Formation of a new substance

8.

What is velocity?A. They rearrange into new substances B. Force, mass, and acceleration C. Speed with direction D. Total mass is conserved

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Answers and teaching notes

Use the answers to check the work after the learner finishes. For writing prompts, the guide describes what a strong response should include.

Show answers for version 12
  1. What is a wave's frequency?The number of cycles per unit time
  2. What happens to atoms during a chemical reaction?They rearrange into new substances
  3. What does Newton's second law relate?Force, mass, and acceleration
  4. What is evidence of a chemical change?Formation of a new substance
  5. How is mass affected in a closed-system reaction?Total mass is conserved
  6. What do like electric charges do?Repel
  7. What transfers thermal energy by direct contact?Conduction
  8. What is velocity?Speed with direction

Worked example

Read the direction, identify the assessed skill, solve or cite evidence, and check the response.

Common mistake

Using a memorized procedure without checking what the question asks.

Helpful hint

Name the standard skill before answering.