The water cycle is:
The tendency for water to travel in circles
The constant movement of water from the atmosphere to the earth
       and its return to the atmosphere
The constant movement of water from high areas to low areas
A bicycle that is powered by water

When a puddle in your garden disappears, it:
goes away like magic
only goes up into the clouds
only soaks into the ground
goes up into the clouds and soaks down into the ground

Percolation is important because:
a) plants depend on it for the water they need to grow
b) coffee wouldn't be possible without it
part of our drinking water supply comes from water under the ground
both a) and c)

When liquid water changes into gas, the change is called:
Evaporation
Aeration
Freezing
Melting

The process of water changing from the gas form into the liquid or solid form is called:
Rain
Conductivity
Condensation
Refrigeration

Water returning to earth from the atmosphere is called:
percolation
condensation
precipitation
evaporation

Precipitation can fall to earth in the form of:
rain
snow
hail
any of the above

Precipitation in Irvine is almost always in the form of rain because:
We don't get much precipitation here
It rarely gets cold enough here for the precipitation to turn into a solid form
It rarely gets warm enough in the winter
We live in a semi-arid climate

Transpiration is the process in which:
puddles evaporate into clouds
people breathe in air and exhale carbon dioxide
water vapor moves from living plants into the atmosphere
a new universe is formed

What powers the water cycle?
The sun
The tides
Rainfall
Evaporation

Because the water cycle has existed for millions of years, we are using the same water today that dinosaurs used when they roamed the earth.
True
False