Water

Water for Life

Water

States of Water

• Water can occur in three states.

• solid, liquid, and gas

Solid Water

• Ice is frozen water.

• The particles in ice are closely packed together.

• Freezing is the process by which liquid water is transformed into ice.

• Water freezes at 0 degrees Celsius or 32 degrees Fahrenheit.

Liquid Water

• Water ( is a transparent fluid which forms the world's streams, lakes, oceans and rain, and is the major constituent of the fluids of organisms.

• The chemical formula of water is H2O.

• A water molecule contains two (2) Hydrogen (H) atoms one oxygen (O) atom.

• Water boils at 100 degrees Celsius or 212 degrees Fahrenheit.

Water as a Gas

• Vapor is water in gas form.

• Water vapor is always present in the air.

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Water can Change States

• Boiling is the action of bringing a liquid to the temperature at which it bubbles and turns to vapor.

• Evaporation is a process where liquids change to a gas or vapor. Water changes to a vapor or steam from the energy created when molecules bounce into one another because they're heated up.

Water can Change states (part2)

• Condensation is the process where water vapor becomes liquid. It is the reverse of evaporation, where liquid water becomes a vapor. 

• Examples of Condensation: Having a cold soda on a hot day, the can "sweats." Water molecules in the air as a vapor hit the colder surface of the can and turn into liquid water.

Water is Life

• All living organisms need water to live.

• Some types of water are:

• • Freshwater or naturally occurring water.

• • Saltwater water containing large amounts of salt.

• • Ground water is water from rain that flows on the surface and collects underground.

The End

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