Grade 8 · Science · Challenge
Free Science Concepts and Evidence worksheet - version 15
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-JK2JVE-1QWR
What happens to atoms during a chemical reaction?A. They rearrange into new substances B. Speed with direction C. The number of cycles per unit time D. Force, mass, and acceleration
What does Newton's second law relate?A. Force, mass, and acceleration B. Total mass is conserved C. They rearrange into new substances D. Speed with direction
What do like electric charges do?A. Force, mass, and acceleration B. Repel C. Conduction D. Speed with direction
What transfers thermal energy by direct contact?A. Conduction B. Speed with direction C. They rearrange into new substances D. Formation of a new substance
What is evidence of a chemical change?A. Formation of a new substance B. Conduction C. Repel D. The number of cycles per unit time
What is velocity?A. They rearrange into new substances B. Repel C. The number of cycles per unit time D. Speed with direction
What is a wave's frequency?A. They rearrange into new substances B. Speed with direction C. The number of cycles per unit time D. Conduction
How is mass affected in a closed-system reaction?A. Conduction B. Force, mass, and acceleration C. The number of cycles per unit time 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 15
- What happens to atoms during a chemical reaction?They rearrange into new substances
- What does Newton's second law relate?Force, mass, and acceleration
- What do like electric charges do?Repel
- What transfers thermal energy by direct contact?Conduction
- What is evidence of a chemical change?Formation of a new substance
- What is velocity?Speed with direction
- What is a wave's frequency?The number of cycles per unit time
- How is mass affected in a closed-system reaction?Total mass is conserved
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.