Grade 8 · Science · Building Confidence
Free Science Concepts and Evidence worksheet - version 4
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-Q6LSEY-1751
What is evidence of a chemical change?A. Formation of a new substance B. Speed with direction C. Total mass is conserved D. They rearrange into new substances
What is velocity?A. The number of cycles per unit time B. Speed with direction C. Repel D. Total mass is conserved
How is mass affected in a closed-system reaction?A. Repel B. The number of cycles per unit time C. Formation of a new substance D. Total mass is conserved
What do like electric charges do?A. Repel B. The number of cycles per unit time C. Speed with direction D. Force, mass, and acceleration
What is a wave's frequency?A. Total mass is conserved B. The number of cycles per unit time C. They rearrange into new substances D. Speed with direction
What transfers thermal energy by direct contact?A. Conduction B. Force, mass, and acceleration C. Speed with direction D. The number of cycles per unit time
What does Newton's second law relate?A. Force, mass, and acceleration B. Speed with direction C. Formation of a new substance D. They rearrange into new substances
What happens to atoms during a chemical reaction?A. Total mass is conserved B. Repel C. They rearrange into new substances 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 4
- What is evidence of a chemical change?Formation of a new substance
- What is velocity?Speed with direction
- How is mass affected in a closed-system reaction?Total mass is conserved
- What do like electric charges do?Repel
- What is a wave's frequency?The number of cycles per unit time
- What transfers thermal energy by direct contact?Conduction
- What does Newton's second law relate?Force, mass, and acceleration
- What happens to atoms during a chemical reaction?They rearrange into new substances
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.