science test #2 Flashcards
1
Q
matter
A
anything that has mass and takes up space
2
Q
substance
A
a single kind of matter that is pure
3
Q
element
A
a pure substance that cannot be broken into any other substance by chemical or physical means
4
Q
atom
A
an extremely small amount of a thing or quality
5
Q
molecule
A
are formed when when groups of two or more atoms are created
6
Q
compound
A
a thing that is composed of two or more separate elements
7
Q
mixture
A
are not pure substances
8
Q
mass
A
the amount of matter in an object
9
Q
A
10
Q
the law of conservation of matter
A
11
Q
energy
A
the ability to do work or cause change
12
Q
kinetic energy
A
energy of moving things
13
Q
potential energy
A
energy that is stored in an object because of its position
14
Q
A
15
Q
physical change
A
