Elementary (K–5)
Science
Science: States of Matter: Easy Practice
Free states of matter practice for elementary physical science. Review solids, liquids, and gases plus melting, freezing, evaporation, and condensation. Build confidence with foundational questions. Review key vocabulary and core skills before moving to harder sets.
Easy Level Guide
Build confidence with foundational questions. Review key vocabulary and core skills before moving to harder sets.
Properties of Solids, Liquids, and Gases
Solids have a definite shape and volume. Liquids have a definite volume but take the shape of their container. Gases have no definite shape or volume and spread to fill available space. All matter is made of tiny particles in motion.
Particle Model
In solids, particles are packed closely and vibrate in place. In liquids, particles slide past each other. In gases, particles move freely and are far apart. Heating adds energy and makes particles move faster.
Changes of State
Melting changes a solid to a liquid. Freezing changes a liquid to a solid. Evaporation changes a liquid to a gas at the surface. Boiling is rapid evaporation throughout a liquid. Condensation changes a gas to a liquid.
Physical vs Chemical Changes
A change of state is physical because the substance is still the same material. Ice, liquid water, and water vapor are all H₂O. Physical changes can often be reversed. Chemical changes form new substances with different properties.
FAQ
- Does this include the particle model?
- Yes. Explanations reference how particles behave in each state, which supports modern elementary science standards.
- Is plasma covered?
- This pack focuses on solids, liquids, and gases most common in grades 3 through 5 curricula.