1. Water
8th Grade Science

2. Warm-Up
Q). List as many words or phrases that come to your head when you think of the word hydrosphere

3. The hydrosphere is all of Earth’s water
The hydrosphere is all of Earth’s water. (This includes water vapor in the air and in living things.)
Hydrosphere – Water on Earth
Lithosphere – Land on Earth
Atmosphere – Air on Earth
Biosphere – Plants/Animals (Life) on Earth

4. The _____________is all of Earth’s _________
The _____________is all of Earth’s _________. (This includes water _____________ in the air and in __________________ things.)
Hydrosphere – Water on Earth
Lithosphere – Land on Earth
Atmosphere – Air on Earth
Biosphere – Plants/Animals (Life) on Earth

6. 6 Billion Kilometers Away
Image of Earth
6 Billion Kilometers Away
Voyager Space Probe 1990

7. Earth is known as the blue planet as it has a blue glow from space.
This blue is from all of the water on our planet.

8. Water is critical for our planet. List some uses:

9. Water Usage.
Copyright © 2010 Ryan P. Murphy

10. Survival / Health
Copyright © 2010 Ryan P. Murphy

11. Household
Copyright © 2010 Ryan P. Murphy

12. Recreational
Copyright © 2010 Ryan P. Murphy

13. Industrial
Copyright © 2010 Ryan P. Murphy

14. Transportation
Copyright © 2010 Ryan P. Murphy

15. Agricultural
Copyright © 2010 Ryan P. Murphy

16. Water use varies country to country.

17. Some places don’t have easy access to an ample supply of fresh water…
Do you ever waste water? How might you value and use water differently if this was your daily reality?

18. What % of the earth is covered with water?
Copyright © 2010 Ryan P. Murphy

19. Soil Moisture Rivers and Lakes In living things
Remember, water is located in….
In the air (water vapor)
Soil Moisture
Rivers and Lakes
Oceans
Clouds are Water
In living things
Underground
Ice Caps are Glaciers
Copyright © 2010 Ryan P. Murphy

20. Ice Caps and __________
Remember, water is located in….
In the air (water vapor)
_______ Moisture
Rivers and Lakes
Oceans
_______ are Water
In living things
______________
Ice Caps and __________
Copyright © 2010 Ryan P. Murphy

21. Close to 71% of the earth is covered with water!
That’s over 2/3rds of our planet!!

22. Close to _______ of the earth is covered with water!
That’s over ________ of our planet!!

23. Water’s importance Water is vital for every organism on the planet.
Water mainly exists as a liquid on Earth.
Water is the only
substance found in all
three states on Earth.

24. Water’s importance
Water is vital for every _____________ on the planet.
Water mainly exists as a __________on Earth.
Water is the ______
substance found in all
________ _________
on Earth.

25. O 1 molecule of water is made up of 2 hydrogen atoms
STRUCTURE OF WATER H H O
1 molecule of water is
made up of 2 hydrogen atoms
bonded with 1 oxygen atom

26. O 1 molecule of water is made up of __ __________ atoms
STRUCTURE OF WATER H H O
Chemical Formula:_______
1 molecule of water is
made up of __ __________ atoms
bonded with __ ____________ atom.

27. CHEMICAL FORMULA
H2O = RIGHT
H2O = WRONG
2HO = WRONG

28. What is a molecule?
A molecule is a group of atoms bonded together.

29. H H O STRUCTURE OF WATER The bond that forms water
is a covalent bond because electrons are shared between both atoms.

30. The bond that forms water
STRUCTURE OF WATER H H O
The bond that forms water
is a ___________ bond because electrons are ___________between both atoms.

31. O H
1 molecule of water

32. A LOT OF MOLECULES OF WATERH O H O H O H O H O H O H O H O H
A LOT OF MOLECULES
OF WATER O H O H O H O H O H O H O H O H O H

33. Millions of molecules of water make up 1 raindrop!

34. A water molecule is POLAR
This means that it has electrically charged areas.
There are opposite charges on opposite sides of the molecule
One side is positive and one side is negative.
Also called a polar substance or polar compound. _ +
DURACELL

35. A water molecule is POLAR
This means that it has electrically ____________ areas.
There are ______________ charges on opposite sides of the molecule
One side is positive and one side is _____________.
Also called a ___________ substance or polar compound. (Just think of the north and south poles being at opposite ends of the planet.) _ +
DURACELL

36. NON-POLAR SUBSTANCES
Non-polar substances do not have charged ends because charges are equally distributed.

37. NON-POLAR SUBSTANCES
Non-polar substances ___ _____have charged ends because charges are _______ distributed.

38. POLAR MOLECULE
The positive hydrogen ends of 1 molecule are attracted to the negative oxygen end of another molecule. O H O H

39. POLAR MOLECULE
The ____________ ____________ ends of 1 molecule are ______________ to the _____________ _____________ end of another molecule. O H O H +

40. + + O H - -

41. + + O H - O H

42. + + O H O H O H

43. O H + + O H O H O H

44. O H O H + O H O H O H

45. Polarity drives other properties!
Universal Solvent (
Cohesion
Adhesion
Surface tension
Capillary Action
And others.

46. Mini Labs
You will be conducting a series of labs today in order to determine what properties are taking place and how these properties are at work.

47. States of Matter
Water can take the form of a solid, liquid or gas on our planet.
Water exists mainly as a liquid on Earth.

48. Group Activity
Work with your group to develop an explanation for the following question.
Write it down and draw a picture to help you explain.
Be ready to share your ideas with the class.

49. If this is true, why does ice (a solid) float in water (a liquid).
Almost all solid substances are more dense than when they are in liquid form.
If this is true, why does ice (a solid) float in water (a liquid).

50. Watch the movie to find out! “The Chemistry of Ice”
Watch the movie to find out!
“The Chemistry of Ice”

51. Testing water’s polarity…
See if you can use water’s polarity to “bend water” with a balloon.

52. HW
“Amazing Properties of Matter” worksheet

53. Warm-Up: 4/7/16
Q). Water’s nickname is “Universal Solvent.” Why?

54. Polarity drives other properties!
Universal Solvent (
Cohesion
Adhesion
Surface tension
Capillary Action