How Can matter change state?
Give 1 example of a physical change
Sharpened pencil, because it changes without changining the element inside
a gas-what is an example? are the particle close to each other?- they do 2 things-evaporate and what?
air!-That is an example, they condense into a liquid. they are far away frome eachother.
the temp at what a substance freezes is its...
freezing point
The 3 states of matter
Solid, Liquid, Gas
Sublimation=what
Solid into gas
boiling point of water
100oc
What will happpen if you put an icecube on the counter overnight? HINT:(it changes into one thing first, then something else)
It melts, Then turns into a gas
if a solid gains enogh heat-what happens to the particles?
the particles start moving fast to stay together.
last question but in farenhight.
212oc
What happens to a particles when they become a solid- What shape?- what state?
They clump together - a square-freezing
just befor freezing-water particles do what?
move farther apart and line up in a solid arrangment.
thermal expansion is...
the increase in an object's volume due to change in heat.
What happens to paricles when they turn into a liquid-what movement, do they melt-yes or no-from what-what? Do thay lose temp-yes or no?
yes, they melt from a solid-liquid-they lose heat, go a little bit away from eachother
melting point of water?
0oc
Thermal contraction is...
the decrease in an object's volume due to change of heat