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22 Cards in this Set

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  • Back
Photosynthesis
uses energy form the sun

takes place in green plants
A reaction in which energy is absorbed is called
endothermic
A shiny bar of iron is an example of iron (before or after) a chemical reaction.
after
This is a reactant involved in the burning of paper and the formation of rust.
oxygen
The combining of a base and an acid will result in the formation of a _____ plus water.
salt
Before fireworks are lighted, the substances in the fireworks have a chemical (kinetic or potential) energy.
potential
This is a reaction in which energy is released
exothermic reaction
________ change during a chemical change.
chemical properties
What evidence shows that exploding fireworks is a chemical reaction?
light, noise, heat
_______ do not change in a reaction.
catalyst
During an endothermic reaction, you must (keep supplying energy or release energy) to continue the reaction.
keep supplying energy
Light, heat, and sound are all
forms of energy
An example of a chemical reaction is (baking a cake or melting ice).
baking a cake
When you exhale into limewater using a straw, _____ shows that there was a chemical reaction.
cloudiness
acid
sour taste

reacts with metal

contains oxygen
This slows down a reaction.
inhibitor
This is a common reactant in process like rusting and fruit spoilage.
oxygen
Any substance which slows down a chemical reaction is called
an inhibitor
The new substance formed from a chemical reaction are called
product
When two electrical probes are placed in a beaker of water, the water separates into hydrogen and oxygen. What is the reactant?
water
bases
sour taste

feels slippery

contains hydroxides
Why is hydrogen peroxide kept in a brown bottle?
it breaks down in the presence of light