Grade 8 · Science · On Level
Free Science Concepts and Evidence worksheet - version 17
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-LIC4HE-N8EZ
What happens to atoms during a chemical reaction?A. Speed with direction B. They rearrange into new substances C. Force, mass, and acceleration D. Formation of a new substance
What do like electric charges do?A. Conduction B. Formation of a new substance C. Total mass is conserved D. Repel
What is a wave's frequency?A. The number of cycles per unit time B. Conduction C. Total mass is conserved D. Formation of a new substance
What does Newton's second law relate?A. Force, mass, and acceleration B. Total mass is conserved C. Conduction D. Formation of a new substance
What is velocity?A. Speed with direction B. They rearrange into new substances C. Force, mass, and acceleration D. Formation of a new substance
How is mass affected in a closed-system reaction?A. They rearrange into new substances B. Repel C. Conduction D. Total mass is conserved
What transfers thermal energy by direct contact?A. Speed with direction B. Total mass is conserved C. They rearrange into new substances D. Conduction
What is evidence of a chemical change?A. Total mass is conserved B. Formation of a new substance C. Speed with direction 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 17
- What happens to atoms during a chemical reaction?They rearrange into new substances
- What do like electric charges do?Repel
- What is a wave's frequency?The number of cycles per unit time
- What does Newton's second law relate?Force, mass, and acceleration
- What is velocity?Speed with direction
- How is mass affected in a closed-system reaction?Total mass is conserved
- 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.