Grade 8 · Science · Challenge
Free Science Concepts and Evidence worksheet - version 5
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-15KDYON-1QWR
What is a wave's frequency?A. Conduction B. Formation of a new substance C. Repel D. The number of cycles per unit time
What happens to atoms during a chemical reaction?A. They rearrange into new substances B. Repel C. The number of cycles per unit time D. Formation of a new substance
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. Speed with direction
What is evidence of a chemical change?A. Total mass is conserved B. Repel C. Speed with direction D. Formation of a new substance
How is mass affected in a closed-system reaction?A. Conduction B. Speed with direction C. They rearrange into new substances D. Total mass is conserved
What do like electric charges do?A. Formation of a new substance B. Speed with direction C. Repel D. The number of cycles per unit time
What is velocity?A. Formation of a new substance B. They rearrange into new substances C. Force, mass, and acceleration D. Speed with direction
What transfers thermal energy by direct contact?A. The number of cycles per unit time B. Conduction C. They rearrange into new substances D. Formation of a new substance
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 5
- What is a wave's frequency?The number of cycles per unit time
- 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 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 is velocity?Speed with direction
- 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.