Grade 8 · Science · Challenge
Free Science Concepts and Evidence worksheet - version 2
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-14QF5LQ-1QWR
What is a wave's frequency?A. Speed with direction B. Formation of a new substance C. Force, mass, and acceleration D. The number of cycles per unit time
What transfers thermal energy by direct contact?A. Formation of a new substance B. Total mass is conserved C. Conduction D. Repel
What is evidence of a chemical change?A. Formation of a new substance B. Total mass is conserved C. They rearrange into new substances D. Speed with direction
What does Newton's second law relate?A. Speed with direction B. Force, mass, and acceleration C. They rearrange into new substances D. Conduction
How is mass affected in a closed-system reaction?A. Formation of a new substance B. Total mass is conserved C. Speed with direction D. Force, mass, and acceleration
What is velocity?A. Total mass is conserved B. Force, mass, and acceleration C. They rearrange into new substances D. Speed with direction
What do like electric charges do?A. Repel B. Force, mass, and acceleration C. Speed with direction D. Conduction
What happens to atoms during a chemical reaction?A. Force, mass, and acceleration B. Speed with direction C. Repel D. They rearrange into new substances
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 2
- What is a wave's frequency?The number of cycles per unit time
- What transfers thermal energy by direct contact?Conduction
- What is evidence of a chemical change?Formation of a new substance
- What does Newton's second law relate?Force, mass, and acceleration
- How is mass affected in a closed-system reaction?Total mass is conserved
- What is velocity?Speed with direction
- What do like electric charges do?Repel
- What happens to atoms during a chemical reaction?They rearrange into new substances
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.