Liquids have small particles that are loosely clustered together. Liquids volume does not change, but their form takes on the shape of whatever they are in

Solids have small particles that are tightly clustered together. They have the same volume and shape at all times.

Physical Science Standard

NSES Objective for K-4. CONTENT STANDARD B:As a result of the activities ingrades K-4, all students shoulddevelop an understanding of■ Properties of objects and materials■ Position and motion of objects■ Light, heat, electricity, and magnetism

- P.2.5 Organization of Matter and Chemical Interactions - P.2.5 Students will demonstrate an understanding of the properties of matter. The MS Science Framework Objective

Gases have small particles that are not tightly clustered at all.Gases do not have a definite shape or volume.