Grade 8 · Science · On Level
Free Science Concepts and Evidence worksheet - version 20
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-1NII0EW-N8EZ
What is velocity?A. Force, mass, and acceleration B. They rearrange into new substances C. Speed with direction D. Total mass is conserved
How is mass affected in a closed-system reaction?A. Formation of a new substance B. Repel C. Total mass is conserved D. The number of cycles per unit time
What is evidence of a chemical change?A. Formation of a new substance B. The number of cycles per unit time C. Total mass is conserved D. They rearrange into new substances
What happens to atoms during a chemical reaction?A. They rearrange into new substances B. The number of cycles per unit time C. Conduction D. Force, mass, and acceleration
What is a wave's frequency?A. Conduction B. They rearrange into new substances C. The number of cycles per unit time D. Repel
What does Newton's second law relate?A. They rearrange into new substances B. Speed with direction C. The number of cycles per unit time D. Force, mass, and acceleration
What do like electric charges do?A. Repel B. Speed with direction C. Force, mass, and acceleration D. Total mass is conserved
What transfers thermal energy by direct contact?A. Total mass is conserved B. Conduction C. Formation of a new substance D. Speed with direction
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 20
- What is velocity?Speed with direction
- How is mass affected in a closed-system reaction?Total mass is conserved
- What is evidence of a chemical change?Formation of a new substance
- 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 does Newton's second law relate?Force, mass, and acceleration
- What do like electric charges do?Repel
- 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.