Answer:
Gas- Examples of gases include air, water vapor, and helium. A gas is a state of matter that has no fixed volume or shape. ... A gas may be either a pure substance.
Rain- Rain is condensed moisture from the atmosphere that drops on the Earth as water. An example of rain is drops of water that fall from the sky. To fall in drops of water from the clouds. To release rain.
Fog- Frequency: The definition of a fog is a mist of water vapor that is low to the ground, a mist of another liquid, or a state of confusion or blurred vision. An example of a fog is the cool gray cloud that covers San Francisco. An example of a fog is the little cloud of insect spray over a corn field.