Grade 8 · Science · Challenge
Free Science Concepts and Evidence worksheet - version 17
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-J03CHG-1QWR
What do like electric charges do?A. Repel B. Total mass is conserved C. Force, mass, and acceleration D. The number of cycles per unit time
What transfers thermal energy by direct contact?A. The number of cycles per unit time B. Speed with direction C. They rearrange into new substances D. Conduction
What is a wave's frequency?A. Formation of a new substance B. The number of cycles per unit time C. They rearrange into new substances D. Speed with direction
What is velocity?A. Total mass is conserved B. They rearrange into new substances C. Conduction D. Speed with direction
What is evidence of a chemical change?A. Formation of a new substance B. Conduction C. Speed with direction D. Force, mass, and acceleration
What happens to atoms during a chemical reaction?A. They rearrange into new substances B. Speed with direction C. Conduction D. Force, mass, and acceleration
What does Newton's second law relate?A. Repel B. They rearrange into new substances C. Conduction D. Force, mass, and acceleration
How is mass affected in a closed-system reaction?A. They rearrange into new substances B. Total mass is conserved C. The number of cycles per unit time 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 17
- What do like electric charges do?Repel
- What transfers thermal energy by direct contact?Conduction
- 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 happens to atoms during a chemical reaction?They rearrange into new substances
- What does Newton's second law relate?Force, mass, and acceleration
- How is mass affected in a closed-system reaction?Total mass is conserved
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.