1. All the Water on Earth
S6E3b: Relate various atmospheric conditions to stages of the water cycle

2. How is the amount of water on Earth divided up?
3% = Freshwater
97% = Saltwater

3. Is most of the water on Earth freshwater or saltwater?

4. All the Water on Earth Saltwater Freshwater Groundwater
Rivers and Lakes
Ice caps and glaciers
Soil and atmosphere

5. What are 5 Ways You Use Water?

6. Did You Know…
The amount of water on Earth has been the same for eons, however the form and state of water is constantly changing!
The majority of the world’s freshwater is in ice caps at the North and South poles….
So we have to get our water from springs, creeks, streams, rivers, lakes and oceans

7. Two Characteristics of Water
Saltwater is found in oceans
Freshwater is our primary source of drinking water

8. Good to Know! The Sun is the driving force of the Earth’s weather
And the major source of energy which ALSO powers the water cycle is the Sun…but we will get to that tomorrow.

9. Where can we get our hands on this freshwater?
¾ Freshwater is Frozen Solid
in ice caps and glaciers
¼ Freshwater is Liquid underground
A tiny fraction is in lakes & rivers
A smaller fraction is water vapor in the atmosphere

10. So… If we had a water bottle and filled it with 1000mL of water
972 mL would be in saltwater
28mL would be freshwater

11. Then… Out of that 28mL of freshwater
23.5mL would be stuck frozen in ice caps and glaciers!
4mL would be underground
2mL would be in lakes and rivers
1mL would be in the soil and air

12. Water never leaves the Earth
Water never leaves the Earth. It is constantly being cycled through the atmosphere, ocean, and land. This process, known as the water cycle, is driven by energy from the sun. The water cycle is crucial to the existence of life on our planet.

14. The Water Cycle

15. During part of the water cycle, the sun heats up liquid water and changes it to a gas by the process of evaporation. Water that evaporates from Earth’s oceans, lakes, rivers, and moist soil rises up into the atmosphere.

17. The process of evaporation from plants is called transpiration
The process of evaporation from plants is called transpiration. (In other words, it’s like plants sweating.)

19. As water (in the form of gas) rises higher in the atmosphere, it starts to cool and become a liquid again. This process is called condensation. When a large amount of water vapor condenses, it results in the formation of clouds.

20. You Know This! Think of it like when you take a shower
The water is HOT (or warm)
Thinking back to evaporation, we know when the water heats, it turns into a vapor and enters the atmosphere
Once this vapor hits your cooler mirror, it turns into a liquid again

22. When the water in the clouds gets too heavy, the water falls back to the earth. This is called precipitation.

24. When rain falls on the land, some of the water is absorbed into the ground forming pockets of water called groundwater. Most groundwater eventually returns to the ocean. Other precipitation runs directly into streams or rivers. Water that collects in rivers, streams, and oceans is called runoff.

26. Show Me You Understand! Some of you will receive a card.
If you see your part of the water cycle happening, hold your card up and tell the class what it is with a definition.
*Hint: evaporation and condensation happen quickly together*