Grade 8 · Science · Challenge
Free Science Concepts and Evidence worksheet - version 3
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.
Science Concepts and Evidence
Grade 8 · Stretch challenge · 8 questions · Version PG-150ERAP-1QWR
What is evidence of a chemical change?A. Formation of a new substance B. Total mass is conserved C. Repel D. Conduction
What do like electric charges do?A. Speed with direction B. Conduction C. Force, mass, and acceleration D. Repel
What is a wave's frequency?A. Conduction B. The number of cycles per unit time C. Repel D. Total mass is conserved
What does Newton's second law relate?A. Repel B. Formation of a new substance C. They rearrange into new substances D. Force, mass, and acceleration
How is mass affected in a closed-system reaction?A. Total mass is conserved B. They rearrange into new substances C. Speed with direction D. Force, mass, and acceleration
What happens to atoms during a chemical reaction?A. Total mass is conserved B. Formation of a new substance C. Repel D. They rearrange into new substances
What transfers thermal energy by direct contact?A. Conduction B. Total mass is conserved C. Formation of a new substance D. Repel
What is velocity?A. Force, mass, and acceleration B. They rearrange into new substances C. Speed with direction D. Total mass is conserved
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 3
- What is evidence of a chemical change?Formation of a new substance
- What do like electric charges do?Repel
- What is a wave's frequency?The number of cycles per unit time
- What does Newton's second law relate?Force, mass, and acceleration
- How is mass affected in a closed-system reaction?Total mass is conserved
- What happens to atoms during a chemical reaction?They rearrange into new substances
- What transfers thermal energy by direct contact?Conduction
- 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.