States of Matter---
Solids---definite shape and mass and volume
Liquids---definite mass and volume, takes on the shape of its container
Gasses---does have a definite mass, no definite volume or shape

· physical and chemical changes
· melting, freezing
· water cycle---evaporation,

 precipitation, condensation
· heat energy causes state changes
· mass and volume
· properties
· mixtures

Unifying concepts and processes in science
· parts and wholes

Science and technology
Materials science---different things are made of different materials because they have different properties

Science in personal and social perspective:
Clear communication is an essential part of doing science. It enables scientists to inform others about their work, expose their ideas to criticism by other scientists, and stay informed about scientific discoveries around the world