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Physical ScienceGrade 5-7

States of Matter Answer Key

Explore the properties of solids, liquids, and gases and how matter changes between states.

Looking for States of Matter answers? This complete answer key provides verified solutions for all student exploration activities and assessment questions in the ExploreLearning States of Matter Gizmo.

100% Free • Step-by-step explanations • Perfect for homework help • Covers all activities • Updated for 2026

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Prior Knowledge Questions

Q1.What are the three common states of matter?

Answer

The three common states of matter are solid, liquid, and gas.

Q2.How are the particles arranged in a solid?

Answer

In a solid, particles are tightly packed in a fixed arrangement and vibrate in place.

Q3.How are the particles arranged in a gas?

Answer

In a gas, particles are far apart and move rapidly in all directions.

Activity A – Phase Changes

Q4.What is melting?

Q5.What is evaporation?

Q6.What is condensation?

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