Grade 8 · Science · Building Confidence
Free Science Concepts and Evidence worksheet - version 7
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 · Building confidence · 8 questions · Version PG-PWM6PZ-1751
What is a wave's frequency?A. Speed with direction B. They rearrange into new substances C. The number of cycles per unit time D. Total mass is conserved
What happens to atoms during a chemical reaction?A. The number of cycles per unit time B. Conduction C. They rearrange into new substances D. Total mass is conserved
What is evidence of a chemical change?A. They rearrange into new substances B. The number of cycles per unit time C. Conduction D. Formation of a new substance
How is mass affected in a closed-system reaction?A. Force, mass, and acceleration B. The number of cycles per unit time C. Speed with direction D. Total mass is conserved
What transfers thermal energy by direct contact?A. Total mass is conserved B. The number of cycles per unit time C. Conduction D. Formation of a new substance
What do like electric charges do?A. Formation of a new substance B. Speed with direction C. They rearrange into new substances D. Repel
What is velocity?A. Formation of a new substance B. Repel C. Speed with direction D. Force, mass, and acceleration
What does Newton's second law relate?A. Repel B. The number of cycles per unit time C. Total mass is conserved D. Force, mass, and acceleration
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 7
- 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 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 transfers thermal energy by direct contact?Conduction
- What do like electric charges do?Repel
- What is velocity?Speed with direction
- 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.