Water, Water, Water

Where Is Water Found?

• 70% of the Earth is covered by water.

• 97% of all water is found in the oceans

• 2% of all water is found in glaciers and ice caps

• 1% is found in soil water, groundwater, lakes, ponds, rivers, atmosphere, inside plants and animals

Atmosphere- The blanket of gases that surrounds Earth.

Water vapor- Water in a gas state.

The water in the atmosphere is in a gas state.

The Atmosphere

• Most water vapor is found in the troposphere. This is where weather forms.

• More water vapor is found in the air above water than in the air above land.

Underground Water

• Soil water: water that collects in the soil. It is used by plants.

• Groundwater: water that soaks through the soil and underground rocks

The States of Water

• Water comes in three different states: solid (ice), liquid, gas (water vapor).

• A temperature change causes a change in water state.

---------------colder------------------ gas water ice------------warmer-------------------

The States of Water• Water is matter. All matter is

made of small pieces called molecules.

• The molecules in a solid do not move and are packed together tightly.

• Liquid molecules move slowly around each other.

• Gas molecules move fast around each other.

A water molecule

Changes in State

• Freeze- the process in which moving particles slow down, lose heat, and change from a liquid to a solid

• Melt- when water particles absorb heat energy and change from a solid to a liquid

Remember this from a few weeks ago? What state of water is found in the photos? What changed? What doesn’t it look like this anymore outside?