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