Today Thursday 9/10/15 you will…1. Explain why the special properties of water

make it essential for life.

You need 2. ISN 3. Something to write with 4. Unit 1 learning goals (Blue paper)

• Glue page on to ISN page 16 and complete

• ISN page 17 – Title Macromolecule Unit

Honors IBIS Trip

• Tomorrow meet in Mrs. Zona’s Room 1st period.

• Make sure you bring your lunch and a change of clothes

• Your cell phones will be taken when you arrive and locked in an office

• Dress appropriately or you will not go!!!

Did you know?Koala and humans are the only

animals with unique fingerprints.

Koalas sleep up to 18 hours a day

Koalas don’t normally need to drink as they get all the

moisture they need from the gumleaves. However, they can drink if necessary, such as in times of drought when the

leaves may not contain sufficient moisture

Did you know wet koalas are super creepy?

What do you notice about the H2O molecule(s) below?

Polarity makes water a special molecule!!

Solute=

https://www.youtube.com/watch?v=ASLUY2U1M-8

Polarity1. H2O atoms - opposite

charges attracted like magnets “sticky”

2. Why do we care?– The Polarity, the

Stickiness Gives water its other properties….

- -+ +

- - + +

The oxygen end has a - chargeThe hydrogen end has a + charge.Universal

Solvent

Capillary Action

Surface Tension

High Specific Heat

Density

Cohesion

Adhesion

Polarity

Water is an excellent SolventEx. Kool-aid

Solute + Solvent = Solution

Kool-aid Mix + Water = Oh Yeah!Universal Solvent

Capillary Action

Surface Tension

High Specific Heat

Density

Cohesion

Adhesion

Polarity

material added to the liquid that will dissolve (The smaller amount)

Liquid that items are added to (The Larger amount)

Liquid that all materials are distributed equally

Water is…

The Universal Solvent

Weak H bonds allow it to bond with other sub…. So it DISSOLVES STUFF!

Water is attracted to itself

++- +

+-

++-Universal

Solvent

Capillary Action

Surface Tension

High Specific Heat

Density

Cohesion

Adhesion

Polarity

Cohesion is the attraction of

molecules of the same

substance

Cohesion A. Sticking to itself!

B. Water attracted to other water “sticky” Droplets

C. Why do we care?– Keeps water/blood

together as it moves through plant/blood vessels

Universal Solvent

Capillary Action

Surface Tension

High Specific Heat

Density

Cohesion

Adhesion

Polarity

Water attraction (cohesion) forms

a thin ‘skin’ barrier on surface.

Cohesion at work

Attraction of water to other materials

Ex. Water sticking to a glass, Water droplets on a car, water droplets on a window or wall

Universal Solvent

Capillary Action

Surface Tension

High Specific Heat

Density

Cohesion

Adhesion

Polarity

This is how water moves up plant’s stems!

Universal Solvent

Capillary Action

Surface Tension

High Specific Heat

Density

Cohesion

Adhesion

Polarity Adhesion and cohesion together

cause water to move against gravity

Universal Solvent

Capillary Action

Surface Tension

High specific Heat

Density

Cohesion

Adhesion

Polarity1. Water EXPANDS upon

freezing 2. making it less dense 3. so it FLOATS!

Universal Solvent

Capillary Action

Surface Tension

High specific Heat

Density

Cohesion

Adhesion

Energy Storage

Hydrogen Bond

Water…• Absorbs heat slowly• Retains heat / Energy Longer• maintains temp. of Earth • maintains temp. of Organisms

Homeostasis

High Specific Heat:High Heat Capacity

A. Water absorbs a lot of

heat before it is

affected

A. Why do we care?– HOMEOSTASIS!!!

maintaining internal stability/balance

– Maintains temp. of earth

Importance of Specific Heat capacity

1.Helps in regulating temperatures in a pond:

2.This same concept can be expanded to a world-wide scale. A. Oceans & lakes help regulate the temperature ranges…

1) Water near cities, take longer to heat up & longer to cool, so cities near the oceans will tend to have less change & less extreme temps than inland

2) Midwest states, such as Nebraska, will have colder winters & hotter summers than cities on coast!

A. Fish stay “happy” because the heat capacity means the temp. of the pond will stay relatively the same from day to night.

Properties of Water

Video ClipGreat Review of Water Properties

https://www.youtube.com/watch?v=aVmU3CLxvgU

Water Quiz - Question 1

1. Name The property:I washed my car yesterday. When I finished rinsing it off, it still looked wet and there were all these droplets of water stuck to my car. Even on the windshield that is sloped.

Water Quiz - Question 2

3. Water is considered ___________ because it has a positive and negative end.

Water Quiz - Question 3

4. When water is attracted to itself, like forming a droplet.

Water Quiz - Question 4

5. A solution is made of what two items

__________ + ____________ = solution

Water Quiz - Question 5

7. What property is described?I saw a bug walking across the water! He didn’t sink through, and it looked like the water bent underneath it.

Water Quiz - Question 6

8. Areas of land along a large lake or an ocean, seem cooler than other areas near them. What property of water proves this to be true?

Water Quiz - Question 7

9. What type of bonding occurs between hydrogen atoms and other types of atoms?

Water Quiz - Question 8

10. What property of water is described?I put blue food coloring in my vase of roses. 2 days later my roses turned purple!