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STUDY GUIDE

Chemical

creates a new substance like burning paper (bonds have to be broken or formed and the chemical formula must change)

What is the difference between chemical and physical changes?

See answer #2

Compound

two or more different types of elements chemically combined

What is the difference between a chemical formula and chemical equation?

Chemical formula-H2O
Chemical equation- H2 + O -> H2O

Mechanical

anything in motion

Electrical

anything plugged in

Chemical

anything burning

Thermal

Heat

Electromagnetic

visible light, infrared, ultraviolet, x-rays...

Nuclear

suns, stars, bombs

Physical

changes only a portion of its properties-tearing paper

Mixture

two or more elements that are not chemically combined

Element

atoms that are exactly alike (H2 is an element)

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