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15 Cards in this Set
- Front
- Back
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What is a proton?
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positive charge found in a nucleus
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What is a neutron?
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no charge found in a nucleus
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What is an electron?
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negative charge found outside the nucleus
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What is a solid?
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something that is hard to change its shape; molecules are packed tight together
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What is a liquid?
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something that moves easily and takes the shape of its container; molecules move a little, and can move around each other
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What is a gas?
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molecules are moving freely; takes the shape of its container; can be put into a smaller container
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What is plasma?
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most common form of matter; makes up 99% of the visible universe, very vibrant colors; found in stars, lightening, and neon lights
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What is matter?
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Makes up all things; made of atoms; can be a solid, gas, liquid, or plasma
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What does the word brittle mean?
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a solid that can be broken easily
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What does the word ductile mean?
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something that is capable of being molded or shaped
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What is a physical change?
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a change can reversed; the substance is not changed.
Example:cutting your hair, tearing up paper |
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What is a chemical change?
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a change that cannot be reversed easily if at all; when a new substance is made.
Example: burning paper |
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What is an exothermic reaction?
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a reaction that releases energy and gives off heat
Example:lighting a firecracker |
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What is an endothermic reaction?
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a reaction that that absorbs (takes in) energy or heat
Example: cooking pancakes |
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What does the Law of Conservation of Mass say?
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mass cannot be gained or lost in a chemical reaction
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