Grade 8 · Science · On Level
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 · On-level practice · 8 questions · Version PG-KYCX3G-N8EZ
What happens to atoms during a chemical reaction?A. Total mass is conserved B. They rearrange into new substances C. Speed with direction D. Force, mass, and acceleration
What is a wave's frequency?A. Repel B. Total mass is conserved C. They rearrange into new substances D. The number of cycles per unit time
What is velocity?A. Speed with direction B. They rearrange into new substances C. Force, mass, and acceleration D. The number of cycles per unit time
What is evidence of a chemical change?A. Repel B. They rearrange into new substances C. The number of cycles per unit time D. Formation of a new substance
What do like electric charges do?A. The number of cycles per unit time B. Speed with direction C. Total mass is conserved D. Repel
What does Newton's second law relate?A. Force, mass, and acceleration B. The number of cycles per unit time C. Repel D. Speed with direction
How is mass affected in a closed-system reaction?A. Speed with direction B. Total mass is conserved C. Formation of a new substance D. They rearrange into new substances
What transfers thermal energy by direct contact?A. Conduction B. Speed with direction C. Repel 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 15
- What happens to atoms during a chemical reaction?They rearrange into new substances
- What is a wave's frequency?The number of cycles per unit time
- What is velocity?Speed with direction
- What is evidence of a chemical change?Formation of a new substance
- What do like electric charges do?Repel
- 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
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.