Grade 8 · Science · On Level
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 · On-level practice · 8 questions · Version PG-U6MLRE-N8EZ
What happens to atoms during a chemical reaction?A. Repel B. They rearrange into new substances C. Total mass is conserved D. Speed with direction
What does Newton's second law relate?A. Force, mass, and acceleration B. Speed with direction C. Conduction D. Repel
What do like electric charges do?A. Repel B. Conduction C. The number of cycles per unit time D. Total mass is conserved
What is velocity?A. Force, mass, and acceleration B. Repel C. They rearrange into new substances D. Speed with direction
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. Force, mass, and acceleration
What is a wave's frequency?A. They rearrange into new substances B. Formation of a new substance C. The number of cycles per unit time D. Total mass is conserved
What transfers thermal energy by direct contact?A. Repel B. They rearrange into new substances C. Force, mass, and acceleration D. Conduction
What is evidence of a chemical change?A. Speed with direction B. Total mass is conserved C. Formation of a new substance 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 4
- 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 do like electric charges do?Repel
- What is velocity?Speed with direction
- 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 transfers thermal energy by direct contact?Conduction
- 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.