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Changes that do not form a new substance and are reversible are

• phases

• physical changes

• chemical changes

Changes in which one or more new substance is formed are called

• phases of matter

• chemical changes

• physical changes

Physical changes are

• Non-reversible

• Reversible

The formation of the compound molecule salt (NaCl) is a

• physical change

• chemical change

• change in state of matter

Cutting wood is what type of change?

• Physical

• Chemical

Burning wood is what type of change?

• Physical

• Chemical

Chewing food is what type of change?

• Physical

• Chemical

Rust is a form of oxidation. This is what type of change?

• Physcial

• Chemical

Is glass breaking a chemical or phyiscal change?

• chemical
• physical

Is a a rusting bicycle a chemical or physical change?

• chemcial
• physical