thur chem phy change exit

Is burning wood a chemical or physical change?

• chemical
• physical

Which is a physical change?

• burning match 
• vinegar in baking soda 
• melting butter
• cooking an egg

ALL Elements and ALL Compounds are

• able to be broken down

• Chemical Formulas

• Chemical Symbols

• Pure Substances

Answer explanation

Elements and compounds are pure substances because each is composed (made of) of one type of atom for elements (pure) and one type of molecule for compounds such as H20 (water) or NaCl (Salt)--pure salt or pure water.

What kind of change is breaking a window?

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What kind of change is frying an egg?

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What kind of change is a melting popsicle?

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What kind of change is exploding fireworks?

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What kind of change is baking a cake?

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What kind of change is metal rusting?

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What kind of change is freezing water into ice cubes?

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