The document discusses the water cycle and its importance. It explains that water exists as solid, liquid, and gas and provides examples. It notes that water is recycled through evaporation from bodies of water, condensation in clouds, precipitation as rain or snow, and accumulation back in bodies of water. The constant movement of water through this cycle is known as the water cycle. It discusses how floods can occur if too much rain falls and droughts if not enough rain falls.

1. The Water Cycle
A look into the water cycle
and its importance to the
natural world around us.

2. What is Water?
• Water is made out of
two parts:
– Hydrogen
– Oxygen
That is why water is called
H₂O

3. Waters States
• Water can exist
as either a:
–Solid
–Liquid
–Gas
• Examples:
• In what ways do we see water?

4. Where does water come from?
Salt water - Oceans
Fresh water –
Lakes, Rivers, Streams

5. How old is my water?
• How old do you think your water is?
– 1 day old
– 10 days old
– 100 days old
– Millions of years old

6. Your water is millions of years old!
• It is the same water that the dinosaurs drank
• The same water knights on the battle field
drank
• The same water that your great great great
grandparents drank

7. How can my water be that old?
• The amount of water on earth never changes
• It is always being recycled through the
– WATER CYCLE

8. What is the Water Cycle?
The water cycle shows the
constant movement of water
on, above, and below the
surface of Earth.
The water cycle has 4 steps:
1. Evaporation
2. Condensation
3. Precipitation
4. Accumulation

9. Step 1
• Evaporation
– When sun heats
up water in rivers
or lakes or the
ocean and turns it
into vapor or
steam

10. Step 2
• Condensation
– The water steam gets
colder as it rises in the
air and changes back
into a liquid

11. Step 3
• Precipitation
- Precipitation happens
when so much water is in
the air that air cannot
hold it anymore
- The clouds get heavy and
water falls back to the
earth

12. Step 4
• Collection
– When water falls back
to the earth as
precipitation it may go
back in to:
• Oceans
• Lakes
• Rivers
• Or it can soak into the
earth and become part
of the ground water.

13. Then the water moves through the
cycle all over again!
What are the 4 steps ?
1. Evaporation
2. Condensation
3. Precipitation
4. Collection

14. The Magic School Bus: Wet All Over!

15. The Many Adventures of Drippy The
Raindrop

16. What happens if it rains
too much?

17. BREAKING NEWS ALERT
• London gets 73
millimeters of rain in
less than 24 hrs
• London is predicted to
get 50 more millimeters
in the next 48 hours
FLOOD WATCH IN AFFECT

18. What is a flood and how do they
happen?
• Floods happen when areas that collect water
overflow
• Floods happen in low lying areas, as water
usually flows down hill

20. What happens if it doesn’t rain
at all?

21. Droughts
• Droughts are what occur when it does not rain
at all or when it rains but not for long enough
• Droughts make areas look similar to deserts if
they occur for long enough