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thief
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25
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gold
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rocket
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banana
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15
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What are Reactants and Products?
Substances that are combined to form products in a chemical reaction is Reactant.The result of substances being combined is a Product
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What does a Catalyst do in a Chemical Reaction?
A catalyst helps the chemical reaction happen faster, but it does not become a part of the new substance.
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Name Properties you can test before and after a reaction
Magnetism, flammability, electricity, density, and odor
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How is Physical Change different from Chemical Change?
In a physical change, no new substances are formed. In a chemical change, new substances are formed.
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What happens to Atoms in a Reaction? Do some Disappear?
They are Rearranged
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What are Atoms?
The smallest particle of matter made up of protons, neutrons, and electrons.
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thief
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star
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shark
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thief
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eraser
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rocket
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gift
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baam
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What are Molecules?
More than one atom combined to form a substance (e.g., oxygen â O2).
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How do you know a Chemical reaction has happened?
If a new substance is formed, it has different properties.
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Give an Example of a Chemical Change
Steel wool burning, which causes the iron to combine with oxygen and form iron oxide.
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boom
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gift
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fairy
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banana
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In the Steel Wool Expt, how do you know a chemical reaction has taken place?
By testing the properties before and after the reaction.
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