Grade 8 · Science · Challenge
Free Science Concepts and Evidence worksheet - version 7
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-164D62L-1QWR
How is mass affected in a closed-system reaction?A. Speed with direction B. They rearrange into new substances C. The number of cycles per unit time D. Total mass is conserved
What is a wave's frequency?A. The number of cycles per unit time B. Formation of a new substance C. Conduction D. Speed with direction
What do like electric charges do?A. Speed with direction B. They rearrange into new substances C. Conduction D. Repel
What transfers thermal energy by direct contact?A. Conduction B. They rearrange into new substances C. Speed with direction D. Repel
What is velocity?A. Repel B. Force, mass, and acceleration C. Speed with direction D. They rearrange into new substances
What does Newton's second law relate?A. Repel B. Total mass is conserved C. Force, mass, and acceleration D. They rearrange into new substances
What happens to atoms during a chemical reaction?A. Repel B. They rearrange into new substances C. Speed with direction D. Total mass is conserved
What is evidence of a chemical change?A. Force, mass, and acceleration B. They rearrange into new substances C. Speed with direction D. Formation of a new substance
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 7
- How is mass affected in a closed-system reaction?Total mass is conserved
- What is a wave's frequency?The number of cycles per unit time
- What do like electric charges do?Repel
- What transfers thermal energy by direct contact?Conduction
- What is velocity?Speed with direction
- What does Newton's second law relate?Force, mass, and acceleration
- What happens to atoms during a chemical reaction?They rearrange into new substances
- What is evidence of a chemical change?Formation of a new substance
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.