CK-12 Foundation
Ck 12: Physical Science: Freezing
[Free Registration/Login may be required to access all resource tools.] Explains what happens to matter when it freezes and the definition of freezing point.
TeachEngineering
Teach Engineering: Engineering for the Earth
Young students are introduced to the complex systems of the Earth through numerous lessons on its natural resources, processes, weather, climate and landforms. Key earth science topics include rocks, soils and minerals, water and natural...