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24 Cards in this Set
- Front
- Back
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In what two ways can matter change?
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1) physical change
2) chemical change |
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How does a physical change differ from a chemical change?
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A physical change makes matter look or feel different. Chemical changes create new substances.
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Physical change or chemical change?
Water freezing into ice. |
physical change
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Physical change or chemical change?
Water boiling into steam. |
physical change
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Physical change or chemical change?
Burning wood. |
chemical change
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Physical change or chemical change?
photosynthesis |
chemical change
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Physical change or chemical change?
baking a cake |
chemical change
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Physical change or chemical change?
burning gasoline for fuel |
chemical change
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Physical change or chemical change?
rust |
chemical change
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Out of the four original elements, which one was used to create chemical change?
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fire
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the tiniest most basic unit of an element that still has all the properties of that element
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atom
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a substance made of just one type of atom
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chemical element
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a long, spiral-shaped molecule inside the body's cell that controls which traits are passed along from partents to children
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DNA (deoxyribonucleic acid)
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a tiny bit of matter made up of two or more atoms
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molecule
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a substance made from two or more elements that have been chemically combined
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compound
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Which is a compound an why?
water or oxygen gas |
Atoms of the same element can link up to form a molecule, like oxygen gas. Oxygen gas is not a compound because no chemical change has occured. It is still pure oxygen.
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True or False? If false, explain why.
Combining different elements is a chemical change. |
true
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Calcium produces what color flame when burned?
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orangey-red
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Copper produces what color flame when burned?
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emerald green
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Sodium produces what color flame when burned?
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yellow
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Potassium produces what color flame when burned?
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purple
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Which subatomic particle allows you to tell elements apart?
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protons
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What is another term for describing the number of protons and element has?
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atomic number
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True or False? If false, explain why.
A mixture is a chemical change. |
A mixture is a physical change. Atoms do not join together to make new substances.
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