It is an instrument that is used to measure temperature.
Thermometer
It is a blanket or air that wraps around the planet.
Atmosphere
It is when water changes from liquid to gas :
Evaporation
It is how much water vapor is in the atmosphere.
Humidity
It is the movement of water on Earth :
Water Cycle
It is an instrument used to measure air pressure
Barometer
The process when the liquid water is leaving the clouds ?
Precipitation