chem

Element

A pure substance made of only one type of atom.

Compound

A pure substance made of two or more different elements chemically bonded together.

Homogeneous mixture:

A mixture that is uniform throughout; you cannot easily see its different parts. exz, salt

Heterogeneous mixture

A mixture that is not uniform throughout; you can often see its different parts. ex salad

Mixture

A combination of two or more substances that are physically combined, not chemically bonded.

Pure substance

A form of matter that has a fixed composition and uniform properties throughout.

Matter

Anything that has mass and takes up space

Physical Changes

• Tearing paper

Physical Changes

• Dissolving sugar in water

Chemical Changes

Wood burning

Chemical Changes

• An apple turning brown

Homogeneous Mixtures

• Sugar water

Homogeneous Mixtures

• Lemonade

Heterogeneous Mixtures

• Cereal with milk

Heterogeneous Mixtures

Pizza