Grade 8 · Science · Building Confidence
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 · Building confidence · 8 questions · Version PG-CG1U2W-1751
What does Newton's second law relate?A. They rearrange into new substances B. Total mass is conserved C. Force, mass, and acceleration D. Speed with direction
What is velocity?A. Total mass is conserved B. Conduction C. Speed with direction D. They rearrange into new substances
What is evidence of a chemical change?A. Conduction B. Speed with direction C. The number of cycles per unit time D. Formation of a new substance
How is mass affected in a closed-system reaction?A. Total mass is conserved B. Speed with direction C. The number of cycles per unit time D. They rearrange into new substances
What is a wave's frequency?A. Force, mass, and acceleration B. Conduction C. Total mass is conserved D. The number of cycles per unit time
What do like electric charges do?A. They rearrange into new substances B. Force, mass, and acceleration C. Repel D. Conduction
What happens to atoms during a chemical reaction?A. The number of cycles per unit time B. Force, mass, and acceleration C. Total mass is conserved D. They rearrange into new substances
What transfers thermal energy by direct contact?A. Conduction B. They rearrange into new substances C. Repel D. Formation of a new substance
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 does Newton's second law relate?Force, mass, and acceleration
- What is velocity?Speed with direction
- 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
- What do like electric charges do?Repel
- What happens to atoms during a chemical reaction?They rearrange into new substances
- What transfers thermal energy by direct contact?Conduction
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.