Grade 8 · Science · Challenge
Free Science Concepts and Evidence worksheet - version 10
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-IQ3QSH-1QWR
What is a wave's frequency?A. The number of cycles per unit time B. They rearrange into new substances C. Total mass is conserved D. Speed with direction
What do like electric charges do?A. Repel B. They rearrange into new substances C. The number of cycles per unit time D. Total mass is conserved
What does Newton's second law relate?A. Repel B. Force, mass, and acceleration C. They rearrange into new substances D. Conduction
What is evidence of a chemical change?A. Speed with direction B. Formation of a new substance C. Repel D. They rearrange into new substances
How is mass affected in a closed-system reaction?A. Repel B. Formation of a new substance C. Total mass is conserved D. Speed with direction
What happens to atoms during a chemical reaction?A. Repel B. They rearrange into new substances C. The number of cycles per unit time D. Total mass is conserved
What transfers thermal energy by direct contact?A. Speed with direction B. The number of cycles per unit time C. Conduction D. Force, mass, and acceleration
What is velocity?A. They rearrange into new substances B. Formation of a new substance C. Conduction 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 10
- What is a wave's frequency?The number of cycles per unit time
- What do like electric charges do?Repel
- 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 happens to atoms during a chemical reaction?They rearrange into new substances
- What transfers thermal energy by direct contact?Conduction
- What is velocity?Speed with direction
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.