Water has several unique physical properties that are important for life. Its high specific heat means water can absorb large amounts of heat without a large temperature change, allowing bodies of water to moderate temperatures. Water also has a density maximum at 4°C, causing it to expand upon freezing which is unusual for liquids. Additionally, water has a high surface tension and solvent properties, enabling organisms to float, insects to walk on water, and allowing for the dissolution of many substances important for biological functions. These combined physical properties make water well-suited for life.

1. 2/16 A/B Day
LEQ: What physical properties of water
make it unique?
1. What disease do we associate with insulin and
glucose?
2. What disease do we associate with high
cholesterol?
3. What is one risk of using chemicals for agriculture?
Take a look at the following chemical reaction:
6CO2 + 6H2O  C6H12O6 + 6O2
4. List the reactants.
5. List the products.

2. Track your progress!
-1 = 96 -9 = 64 -17 = 32
-2 = 92 -10 = 60 -18 = 28
-3 = 88 -11 = 56 -19 = 24
-4 = 84 -12 = 52 -20 = 20
-5 = 80 -13 = 48 -21 = 16
-6 = 76 -14 = 44 -22 = 12
-7 = 72 -15 = 40 -23 = 8
-8 = 68 -16 = 36 -24 = 4

3. Let’s Review!

4. WHAT’S THAT?!

5. Let’s Review: UNSCRAMBLE!
Protons =
Electrons =
Neutrons =

6. The Periodic Table: List if ingredients use
to make EVERYTHING on Earth

7. Atomic #
=
7 # of protons
in the
nucleus
N
Nitrogen
Atomic Mass =
# of protons 14
and neutrons

9. NORMAL NITROGEN
Protons: 7
Neutrons: 7
Electrons: 7
Protons: 7
Neutrons: 7
Electrons: 8
NITROGEN ION

10. Physical Properties of Water
Density
Solubility
Surface
Tension
Buoyancy
Specific
Heat

11. Colder water = denser water
The “skin” that covers
The upward water’s surface
push of water
molecules on a
substance Water is the
universal
Water heats solvent!
and cools very
slowly!

12. Physical Properties of Water
Density Colder water =
denser water
Solubility Water is the
universal solvent!
Surface The “skin” that covers
the surface of water
Tension
The upward push of
Buoyancy water molecules on a
substance
Specific Water heats and
cools very slowly!
Heat

14. Physical Properties of Water
Density Colder water =
denser water
Solubility Water is the
universal solvent!
Surface The “skin” that covers
the surface of water
Tension
The upward push of
Buoyancy water molecules on a
substance
Specific Water heats and
cools very slowly!
Heat

15. Demos!
1. Surface Tension
2. Buoyancy
3. Solubility
4. Density
5. Specific Heat

16. Number your paper 1-10 (skip 1 line)
1. This shows __________ because……….
(density, solubility, specific
heat, surface tension,
buoyancy)

17. Number your paper 1-10 (do not skip lines)
1. Water molecules push up on a surf board,
causing it to float on the surface of the water.
2. Water striders can “walk” or glide on top of
water because of this property.
3. Even in the middle of a hot summer day,
water stays cool because of this property.
4. You can easily dissolve salt into water
because of this property.
5. Warmer water rises up to the surface
because of this property.

18. 6. Water molecules push up on speed boats, causing
them to float on the surface.
7. Ammonia is a difficult chemical to dissolve, but it
is easily soluble in water because of this property.
8. Even in the middle of winter, lakes and ponds stay
warm enough for fish to live in them because of this
property.
9. You can rest a paper clip on the top of a glass of
water because of this property.
10. Colder water sinks down to the bottom of a glass
because of this property.

19. Show me what you know!

20. Use your notes and your new knowledge from
the lab yesterday to add on to your water
bubble map!
Physical
Properties
WATER

21. Summarizer:
In 4-6 sentences, write a
paragraph to describe what
physical properties of water
make it unique!