unit 1 test Flashcards
1
Q
physical property
A
characteristic of a substance that can be observed w/o changing the substance into another substance
2
Q
chemical property
A
characteristic of a substance that describes its ability to change into other substances
3
Q
endothermic reaction
A
reaction in which energy is absorbed
4
Q
exothermic reaction
A
reacting that releases energy in the form of heat
5
Q
chemical equation
A
short, easy way to show a chemical reaction, using symbols instead of words
6
Q
synthesis
A
when 2 or more elements or compounds combine to make a more complex substance
7
Q
decomposition
A
breaks down compounds into simpler products
8
Q
activation energy
A
minimum amount of energy required to start a chemical reaction
9
Q
matter
A
anything that has mass and takes up space
