Grade 8 · Science · Building Confidence
Free Science Concepts and Evidence worksheet - version 10
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-AI4M83-1751
What is a wave's frequency?A. Conduction B. The number of cycles per unit time C. Force, mass, and acceleration D. Speed with direction
What transfers thermal energy by direct contact?A. Conduction B. Speed with direction C. The number of cycles per unit time D. Force, mass, and acceleration
What happens to atoms during a chemical reaction?A. Force, mass, and acceleration B. Total mass is conserved C. The number of cycles per unit time D. They rearrange into new substances
How is mass affected in a closed-system reaction?A. Total mass is conserved B. Formation of a new substance C. The number of cycles per unit time D. Repel
What is velocity?A. Repel B. Total mass is conserved C. They rearrange into new substances D. Speed with direction
What do like electric charges do?A. Formation of a new substance B. They rearrange into new substances C. Speed with direction D. Repel
What is evidence of a chemical change?A. Conduction B. The number of cycles per unit time C. Speed with direction D. Formation of a new substance
What does Newton's second law relate?A. Force, mass, and acceleration B. Formation of a new substance C. The number of cycles per unit time D. Repel
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 10
- What is a wave's frequency?The number of cycles per unit time
- What transfers thermal energy by direct contact?Conduction
- What happens to atoms during a chemical reaction?They rearrange into new substances
- 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 is evidence of a chemical change?Formation of a new substance
- 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.