Grade 8 · Science · Building Confidence
Free Science Concepts and Evidence worksheet - version 18
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-CQ1FRV-1751
What is velocity?A. Speed with direction B. Force, mass, and acceleration C. Formation of a new substance D. Total mass is conserved
What is evidence of a chemical change?A. Repel B. Conduction C. Speed with direction D. Formation of a new substance
What does Newton's second law relate?A. Force, mass, and acceleration B. They rearrange into new substances C. Speed with direction D. Conduction
How is mass affected in a closed-system reaction?A. Total mass is conserved B. Formation of a new substance C. Conduction D. Force, mass, and acceleration
What transfers thermal energy by direct contact?A. Conduction B. Repel C. The number of cycles per unit time D. Formation of a new substance
What is a wave's frequency?A. The number of cycles per unit time B. Total mass is conserved C. Speed with direction D. Repel
What do like electric charges do?A. Speed with direction B. Force, mass, and acceleration C. Repel D. They rearrange into new substances
What happens to atoms during a chemical reaction?A. Force, mass, and acceleration B. Speed with direction C. Conduction D. They rearrange into new substances
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 18
- What is velocity?Speed with direction
- What is evidence of a chemical change?Formation of a new substance
- What does Newton's second law relate?Force, mass, and acceleration
- How is mass affected in a closed-system reaction?Total mass is conserved
- 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
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.