Grade 8 · Science · Challenge
Free Science Concepts and Evidence worksheet - version 1
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-14GFJWR-1QWR
What is velocity?A. Speed with direction B. They rearrange into new substances C. Conduction D. Force, mass, and acceleration
What transfers thermal energy by direct contact?A. Conduction B. Formation of a new substance C. Total mass is conserved D. Repel
What is a wave's frequency?A. Speed with direction B. The number of cycles per unit time C. They rearrange into new substances D. Formation of a new substance
What do like electric charges do?A. They rearrange into new substances B. Repel C. Speed with direction D. Conduction
What happens to atoms during a chemical reaction?A. Force, mass, and acceleration B. Speed with direction C. Total mass is conserved D. They rearrange into new substances
How is mass affected in a closed-system reaction?A. Conduction B. Repel C. Total mass is conserved D. The number of cycles per unit time
What is evidence of a chemical change?A. Total mass is conserved B. They rearrange into new substances C. The number of cycles per unit time D. Formation of a new substance
What does Newton's second law relate?A. Repel B. They rearrange into new substances C. Total mass is conserved D. Force, mass, and acceleration
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 1
- What is velocity?Speed with direction
- What transfers thermal energy by direct contact?Conduction
- What is a wave's frequency?The number of cycles per unit time
- What do like electric charges do?Repel
- What happens to atoms during a chemical reaction?They rearrange into new substances
- How is mass affected in a closed-system reaction?Total mass is conserved
- What is evidence of a chemical change?Formation of a new substance
- What does Newton's second law relate?Force, mass, and acceleration
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.