Weather and Stars

Vocabulary

cloud

fog

dew

precipitation

water cycle

The Water Cycle

Evaporation Water from oceans and rivers changes to water vapor.

TranspirationPlants release water vapor through their leaves.

Condensation

Water vapor goes back to liquid form.

Precipitation

Water falls back to earth in the form of rain, hail or snow.

CollectionWater comes back to earth’s water reserve.

Dew

It is formed at night when the water vapor in the

air condenses onto any exposed surfaces.

Cloud

Is made of tiny water droplets. A

visible mass of condensed water

vapor floating in the atmosphere,

typically high above the ground.

The Three

Main Types of

Clouds

Cirrus- it is curly, sometimes it looks like silk.

Stratus- the word stratus means ‘to spread out’ in Latin. It forms a layer stretching across the sky.

Cumulus-the word cumulus means

‘a heap’ in Latin. It is thick and puffy, flat bottoms. Shaped like hills.

Cirrus cloud

Stratus cloud

Cumulus cloud

Fog

Fog is cloud near the ground. When the water vapor

near the ground is cooled and condenses into tiny

water droplets, fog is formed.

Precipitation

Is moisture falling from the air to the

ground.

Examples of Precipitation

1. Rain- water falling from the sky when the temperature is above 0 degrees C.

2. Snow- is formed when the temperature is below freezing point of water.

3. Hail- falls in the form of lumps of ice. It happens in summer.