Evaporation
True or False: Gas molecules have a TON of attraction to each other.
False
Ture or false: Molecules in a solid are not random
True
Water molecules like to stay together beacuse?
They are attracted to each other
If you put food coloring in water it eventually spreads through out the water. Why?
Beacuase water molecules move past each other.
What must all matter have? (two things)
Mass and take up space
How random are gas molecules compared to other states of matter?
Very random
When water vapor condenses what change of states takes place?
Gas becomes a liquid.
Why does water become ice when it freezes?
Because the molecules slow down and get closer together as their energy is reduced.
When a thermometer is heated the red liquid moves up the thermometer. Why?
Because the liquid is expanding due to molecules moving faster.
A water molecule is made up of what kind of atoms? (names and numbers)
2 hydrogen and 1 oxygen atoms.
What is the final state of matter in evaporation?
Gas
In the process of condensation, fast moving particles transfer their energy to?
Slower moving particles.
What happens to the water molecules when ice melts to water?
Water molecules speed up and become less attracted.
When you heat a solid what happens to the speed of the molecules?
They move faster.
True or False: In water hydrogen atoms are attracted to oxygen atoms?
True
Do gases have more or less energy than liquids?
More energy than liquids
Cooling water vapor makes it condense faster, why?
The energy of the vapor decreases.
In which state of matter are water molecules the closest together?
Water
When you heat a gas what happens to the space between the molecules?
They get farther apart.
What happens during sublimation?
Solids turn into gases.
What happens to the molecules when they evaporate?
Spread out, gain energy, break off the liquid substance, heat up, move faster
Hot substance to cold substance.
Different liquids freeze at different temperatures. Why?
Different molecules have different levels of attraction.
When a thermometer cools down the red liquid drops. Why?
The molecules are moving slower and getting closer together.
What is it called when a gas directly becomes a solid?
Deposition