Grade 8 · Science · Challenge
Free Science Concepts and Evidence worksheet - version 13
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 · Stretch challenge · 8 questions · Version PG-HW4XPK-1QWR
How is mass affected in a closed-system reaction?A. Total mass is conserved B. They rearrange into new substances C. Speed with direction D. Force, mass, and acceleration
What do like electric charges do?A. Repel B. They rearrange into new substances C. Speed with direction D. Force, mass, and acceleration
What transfers thermal energy by direct contact?A. Conduction B. Total mass is conserved C. Formation of a new substance D. Repel
What happens to atoms during a chemical reaction?A. Conduction B. Repel C. The number of cycles per unit time D. They rearrange into new substances
What is a wave's frequency?A. The number of cycles per unit time B. Repel C. Force, mass, and acceleration D. Speed with direction
What is velocity?A. Formation of a new substance B. Speed with direction C. Force, mass, and acceleration D. They rearrange into new substances
What is evidence of a chemical change?A. They rearrange into new substances B. The number of cycles per unit time C. Total mass is conserved D. Formation of a new substance
What does Newton's second law relate?A. Speed with direction B. Conduction C. They rearrange into new substances 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 13
- How is mass affected in a closed-system reaction?Total mass is conserved
- What do like electric charges do?Repel
- What transfers thermal energy by direct contact?Conduction
- 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 does Newton's second law relate?Force, mass, and acceleration
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.