Gases
This is a gas.
There are empty spaces between the particles of matter that are very large and that can be used to identify a substance because they never change.
the matter always stays the same, expansion and contraction just means the matter is becoming more/less spread out from one another. A change in the state of matter is turning from solid-liquid-gas. The amount of matter always stays the same!
Matter causes a change in state
The state of matter remain unchanged.
The change in which no new kinds of matter are formed but the size, shape or state of the matter may change is known as a physical change.
no physical change does not change matter
no physical change does not change matter
Change of state.
state of matter
The state of matter remain unchanged.
a change in size, shape or the state of matter is a physical change. True for A+.