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4th grade science

helps students discover materials science and the secrets of everyday stuff. Find out what happens when you heat silicon, iron, or carbon. Learn how materials science helps fight cancer, make buildings safer, improve equipment and the environment. Activities in the 60-page teachers guide challenge students to examine their material world in a different way -- through the eyes of materials scientists

A clear description of liquids suitable for young students.

Describes chemical and physical changes

This webpage offers diagrams and information on several different types of magnets.

Provides information in Spanish on the laws of the universe, covering the topics of light, gravity and sound.