Grade 8 · Science · Building Confidence
Free Science Concepts and Evidence worksheet - version 16
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 · Building confidence · 8 questions · Version PG-C628DX-1751
What do like electric charges do?A. Total mass is conserved B. Repel C. The number of cycles per unit time D. Force, mass, and acceleration
What is a wave's frequency?A. Speed with direction B. Total mass is conserved C. Force, mass, and acceleration D. The number of cycles per unit time
How is mass affected in a closed-system reaction?A. Total mass is conserved B. Force, mass, and acceleration C. Repel D. The number of cycles per unit time
What transfers thermal energy by direct contact?A. They rearrange into new substances B. Total mass is conserved C. Conduction D. The number of cycles per unit time
What is velocity?A. Speed with direction B. Repel C. Formation of a new substance D. They rearrange into new substances
What happens to atoms during a chemical reaction?A. Conduction B. They rearrange into new substances C. The number of cycles per unit time D. Speed with direction
What does Newton's second law relate?A. Force, mass, and acceleration B. Repel C. The number of cycles per unit time D. They rearrange into new substances
What is evidence of a chemical change?A. The number of cycles per unit time B. Formation of a new substance C. Speed with direction 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 16
- What do like electric charges do?Repel
- 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
- What transfers thermal energy by direct contact?Conduction
- What is velocity?Speed with direction
- 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 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.