Warm Air and Cold Air
This air is warmer than the air higher up.
What is air near the ground.
When water gains energy and turns into a gas, we call it this process.
What is evaporation?
This force pulls water droplets and ice crystals down.
What is gravity?
Hail forms when water droplets are pushed up to where it is this.
What is cold>?
This type of energy from the sun starts the process of storm formation and all of our weather.
What is radiant energy?
The Sun's radiant energy does this to the ground.
What is warm it up?
This happens when water vapor loses energy, cools, and turns back into liquid in the air.
What is condensation?
When this force is stronger than gravity, particles move up.
What is lift?
Dust, pollen, pollution, and other solids that water vapor can condense onto form clouds.
What is cloud condensation nuclei?
This type of air is less dense and rises.
What is warm air?
This process transfers heat from ground particles to air particles.
What is conduction?
Clouds need this in order for cooling water vapor to condense.
What is cloud condensation nuclei?
The movement of warm air rising and cool air sinking is called this.
What is convection?
As hail goes up, this sticks to it and makes it bigger.
What are water droplets?
This type of air is more dense and sinks.
What is cold air?
When air gets warm, it becomes less dense and does this.
What is rise?
More of this in the air is linked to bigger storms.
What is humidity or water vapor?
Faster updrafts mean hail can do this for longer.
What is stay aloft?
What is convection?
This instrument measures air pressure.
What is a barometer?
Warm air can hold more of this than cold air.
What is water vapor?
This keeps water droplets and ice crystals up in the air.
What is lift or upward air movement?
These are the two ideas for how hail can get big.
What is going up in the cloud or going up and down in the cloud?
Besides, dust, pollen, pollution, over the oceans, this can be cloud condensation nuclei.
What is salt?
The bigger this is, the more air moves up and down.
What is the difference in temperature near the ground compared to higher up?