1. Intro to Earth’s waters
Hydrosphere
Intro to Earth’s waters

2. What is the hydrosphere?
The hydrosphere is ALL of the water on Earth
Obvious Examples: Oceans, lakes, rivers, streams, creeks, seas, ponds, swamps/wetlands
Not So Obvious Examples: clouds, underground reservoirs, glaciers, icebergs water in your body, water within plants

3. Water Distribution on Earth
Open your books to C10
About how much of the Earth is covered by water?

4. Salt Water
Salt water is water that contains dissolved salts and other minerals
Example – ocean

5. Fresh Water
Fresh water is water that is not salty and has little or no taste, color, or smell
Examples – river, lakes, icebergs

6. Salt Water vs Fresh Water: The Facts!
97% is salt water
3% is fresh water
So…out of all the fresh water, 70% is actually frozen or polluted.
That leaves us with 30% that is free flowing or usable.
BUT only 1% of that is safe enough to drink!

7. Water: Where Does It Come From?
The Water Cycle

8. Evaporation
When water changes from a liquid to a gas (water vapor)
What makes the
water evaporate?

9. Condensation
When water changes from a gas (water vapor) to a liquid
Give me an
example of
condensation…

10. Precipitation
When water falls from clouds
What are forms
of precipitation?

11. Run-off/Accumulation
When water moves from one location to another (run-off)
and gathers there (accumulation)
What else can the
water do?

12. Transpiration
Water vapor coming from trees and plants

13. Percolation
Water soaking down into the ground through the soil

14. Questions???

15. What makes water so unique?
Use page NC-21 in the back of the book to fill in the “Properties of Water” chart.
Fill in the “Student Input” boxes ONLY, we will do the “Teacher Input” together.
Once you finish, work on your EOG Review Booklet.

16. Polarity explains a lot!
Oxygen = negative pole Hydrogen = positive pole Water is attracted to itself and other things like a magnet!!
Why do the elements in water have a charge?

17. Cohesion
Because water is polar, it sticks to itself!!

18. Adhesion
Again, because water is polar it sticks to OTHER things too!!

19. Density…you already know this!
Water is less dense as a solid than a liquid…that’s why ice cubes float!

20. Buoyancy
Water’s ability to push back on objects allow them to float! (Has to do with surface area)

21. Specific Heat Water has a really high specific heat
It takes a long time for water to heat up or cool down

22. Universal Solvent
Water can dissolve more substances than anything else!
Remember, the solvent does the dissolving and the solute is what dissolves!

23. Homework
Work on your EOG Review Booklet – first check point coming soon!