Help your students build real understanding of energy in phase changes through ninety questions that move from basic recognition to genuine reasoning about chemistry concepts.

Sample questions include "When ice melts, what happens to the temperature of the water?", "What is the term for the temperature at which a substance changes from liquid to gas?", and "What happens to the energy of water when it boils?"

What's Inside?

• 30 Multiple Choice questions as a separate print ready PDF worksheet
• 30 True or False questions as a separate print ready PDF worksheet
• 30 Short Answer questions as a separate print ready PDF worksheet
• Includes Answer Key with Explanations for all 90 questions
• 6 print ready PDF files, 26 pages in total

Each worksheet reviews the same core ideas from a different angle. Use them across a week or unit so students see the material three times without it ever feeling repetitive.

Ways to Use This Resource

• Homework or review before a test
• Review station before a lab or quiz
• No prep cover lesson for a substitute teacher
• Bell ringers and warm ups during the unit
• Self checking practice, since every answer key includes explanations

This set is part of a complete NGSS aligned chemistry unit. The unit also covers Chemical Energy Basics, Exothermic and Endothermic, Energy Diagrams, Bond Breaking and Forming, Enthalpy Change, and Measuring Energy Transfer, all in the same three worksheet format, so your classroom routine stays familiar while the topic changes.

Suitable for Grade 9-12 chemistry classes, and for NGSS aligned review at any point in the school year. This set is aligned to NGSS standard HS-PS1-4.