Grade 8 · Science · Building Confidence
Free Science Concepts and Evidence worksheet - version 15
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-BC3FB0-1751
How is mass affected in a closed-system reaction?A. Total mass is conserved B. Repel C. Speed with direction D. The number of cycles per unit time
What transfers thermal energy by direct contact?A. Force, mass, and acceleration B. Conduction C. Formation of a new substance D. The number of cycles per unit time
What happens to atoms during a chemical reaction?A. They rearrange into new substances B. Speed with direction C. Force, mass, and acceleration D. Formation of a new substance
What is a wave's frequency?A. Repel B. Formation of a new substance C. Total mass is conserved D. The number of cycles per unit time
What is velocity?A. Speed with direction B. The number of cycles per unit time C. Repel D. Force, mass, and acceleration
What do like electric charges do?A. Conduction B. Speed with direction C. Force, mass, and acceleration D. Repel
What does Newton's second law relate?A. Force, mass, and acceleration B. Repel C. Speed with direction D. They rearrange into new substances
What is evidence of a chemical change?A. Formation of a new substance B. Speed with direction C. Total mass is conserved D. They rearrange into new substances
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 15
- How is mass affected in a closed-system reaction?Total mass is conserved
- What transfers thermal energy by direct contact?Conduction
- 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
- What is velocity?Speed with direction
- What do like electric charges do?Repel
- What does Newton's second law relate?Force, mass, and acceleration
- What is evidence of a chemical change?Formation of a new substance
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.