Grade 8 · Science · Challenge
Free Science Concepts and Evidence worksheet - version 19
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-G87BJQ-1QWR
What do like electric charges do?A. Speed with direction B. They rearrange into new substances C. Total mass is conserved D. Repel
What does Newton's second law relate?A. Conduction B. Force, mass, and acceleration C. Speed with direction D. The number of cycles per unit time
What transfers thermal energy by direct contact?A. Formation of a new substance B. Force, mass, and acceleration C. They rearrange into new substances D. Conduction
How is mass affected in a closed-system reaction?A. They rearrange into new substances B. Speed with direction C. Force, mass, and acceleration D. Total mass is conserved
What is a wave's frequency?A. The number of cycles per unit time B. Repel C. Conduction D. They rearrange into new substances
What is velocity?A. Force, mass, and acceleration B. Speed with direction C. The number of cycles per unit time D. Repel
What happens to atoms during a chemical reaction?A. Conduction B. Total mass is conserved C. Repel D. They rearrange into new substances
What is evidence of a chemical change?A. They rearrange into new substances B. Formation of a new substance 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 19
- What do like electric charges do?Repel
- What does Newton's second law relate?Force, mass, and acceleration
- What transfers thermal energy by direct contact?Conduction
- 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 is velocity?Speed with direction
- 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.