States of Water
Water is one of the few things that is found in nature as a solid, liquid and a gas
There are three states of matter
Solid, liquid, gas
Solid Water - Ice
When water freezes, it expands or gets bigger.
Molecules vibrate back and forth but do not move to different positions.
Ice floats in water because
it is less dense.
Liquid - Water
molecules move freely so sometimes they
bump into each other.
most things dissolve in water which makes water the universal solvent.
greatest range of temperatures
very cold water to very hot water.
Gas - Water Vapor
molecules move quickly and far apart.
water in a gas state is called water vapor.
When water freezes, does it expands (gets bigger) or contract (get smaller)?
Ice is ____ than liquid water.
This state has the greatest range in temperatures.
True or False: molecules in the liquid state vibrate back and forth but don't move positions.
Water vapor (gas) - molecules move quickly and are far apart.
The Water Cycle
The Sun provides the heat which can make water change from one state to another.
Evaporation - heat from the Sun makes the liquid water molecules move faster and evaporate or change into a gas.
Liquid to a gas.
Condensation - water vapor molecules floating in the air cool down and change back into a liquid (clouds).
Gas to a liquid.
Precipitation - the water drops in the cloud get bigger and bigger (cohesion) until eventually they fall as rain or snow.
Condensation is ____
gas to a liquid
liquid to a gas
gas to a solid
solid to a gas