Grade 8 · Science · Challenge
Free Science Concepts and Evidence worksheet - version 18
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-GI6X8P-1QWR
What is velocity?A. Speed with direction B. They rearrange into new substances C. Total mass is conserved D. Force, mass, and acceleration
What transfers thermal energy by direct contact?A. Speed with direction B. Total mass is conserved C. The number of cycles per unit time D. Conduction
What happens to atoms during a chemical reaction?A. Repel B. Formation of a new substance C. Total mass is conserved D. They rearrange into new substances
What do like electric charges do?A. Total mass is conserved B. They rearrange into new substances C. Repel D. Speed with direction
What does Newton's second law relate?A. Formation of a new substance B. They rearrange into new substances C. Total mass is conserved D. Force, mass, and acceleration
What is evidence of a chemical change?A. Formation of a new substance B. The number of cycles per unit time C. Force, mass, and acceleration D. Speed with direction
How is mass affected in a closed-system reaction?A. Total mass is conserved B. They rearrange into new substances C. Force, mass, and acceleration D. Speed with direction
What is a wave's frequency?A. Total mass is conserved B. Repel C. The number of cycles per unit time D. They rearrange into new substances
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 18
- What is velocity?Speed with direction
- What transfers thermal energy by direct contact?Conduction
- What happens to atoms during a chemical reaction?They rearrange into new substances
- What do like electric charges do?Repel
- What does Newton's second law relate?Force, mass, and acceleration
- What is evidence of a chemical change?Formation of a new substance
- 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
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.