Grade 8 · Science · Challenge
Free Science Concepts and Evidence worksheet - version 12
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-I64JEJ-1QWR
What happens to atoms during a chemical reaction?A. Force, mass, and acceleration B. The number of cycles per unit time C. Conduction D. They rearrange into new substances
What is evidence of a chemical change?A. Formation of a new substance B. They rearrange into new substances C. Conduction D. Speed with direction
What transfers thermal energy by direct contact?A. Force, mass, and acceleration B. The number of cycles per unit time C. Conduction D. Total mass is conserved
What do like electric charges do?A. Repel B. Conduction C. Total mass is conserved D. Formation of a new substance
What is velocity?A. The number of cycles per unit time B. Repel C. Conduction D. Speed with direction
How is mass affected in a closed-system reaction?A. They rearrange into new substances B. Speed with direction C. Conduction D. Total mass is conserved
What is a wave's frequency?A. Force, mass, and acceleration B. The number of cycles per unit time C. Repel D. Speed with direction
What does Newton's second law relate?A. Force, mass, and acceleration B. Conduction C. The number of cycles per unit time 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 12
- What happens to atoms during a chemical reaction?They rearrange into new substances
- What is evidence of a chemical change?Formation of a new substance
- What transfers thermal energy by direct contact?Conduction
- What do like electric charges do?Repel
- What is velocity?Speed with direction
- How is mass affected in a closed-system reaction?Total mass is conserved
- What is a wave's frequency?The number of cycles per unit time
- 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.