Grade 8 · Science · Building Confidence
Free Science Concepts and Evidence worksheet - version 5
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-QGLE3X-1751
What happens to atoms during a chemical reaction?A. They rearrange into new substances B. Formation of a new substance C. Speed with direction D. Total mass is conserved
What is a wave's frequency?A. Formation of a new substance B. Repel C. Total mass is conserved D. The number of cycles per unit time
How is mass affected in a closed-system reaction?A. Total mass is conserved B. Force, mass, and acceleration C. Speed with direction D. They rearrange into new substances
What do like electric charges do?A. Force, mass, and acceleration B. Repel C. Speed with direction D. Total mass is conserved
What transfers thermal energy by direct contact?A. Conduction B. Total mass is conserved C. Speed with direction D. The number of cycles per unit time
What is evidence of a chemical change?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. Total mass is conserved B. They rearrange into new substances C. Conduction D. Force, mass, and acceleration
What is velocity?A. Total mass is conserved B. Repel 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 5
- What happens to atoms during a chemical reaction?They rearrange into new substances
- What is a wave's frequency?The number of cycles per unit time
- How is mass affected in a closed-system reaction?Total mass is conserved
- What do like electric charges do?Repel
- 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
- 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.