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Warm Up, October 24 th , 2013 1) Why does water stick to itself? Why does water stick to most other things? 2) What do you think the term ‘surface tension’ means (as it relates to water)? 3) Write the molecular formula for water and draw a water molecule. 4) Why is water special (other than ‘it supports life’)

Warm Up, October 24 th , 2013

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Warm Up, October 24 th , 2013. Why does water stick to itself? Why does water stick to most other things? What do you think the term ‘surface tension’ means (as it relates to water)? Write the molecular formula for water and draw a water molecule. - PowerPoint PPT Presentation

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Page 1: Warm Up, October 24 th , 2013

Warm Up, October 24th, 20131) Why does water stick to itself? Why does

water stick to most other things?2) What do you think the term ‘surface

tension’ means (as it relates to water)?3) Write the molecular formula for water and

draw a water molecule.4) Why is water special (other than ‘it

supports life’)

Page 2: Warm Up, October 24 th , 2013

Pumpkin, Day ???

Page 3: Warm Up, October 24 th , 2013

Pre-Assessment – Water 2Then Graphing old Pre and Post Water 1

Page 4: Warm Up, October 24 th , 2013

GRAPHING SUCCESS (EXAMPLE)

Earth 1 Earth 2 Water 1 Water 20

2

4

6

8

10

12

14

16

Pre-AssessPost-Assess

Page 5: Warm Up, October 24 th , 2013

The Strange and Wonderful Mr. WaterWater is an interesting, very unique, and required material in your every day life.

But what makes water so great, you ask?

Page 8: Warm Up, October 24 th , 2013

1. It DISSOLVES most stuff…eventually —UNIVERSAL SOLVENT

2. It occurs NATURALLY in ALL 3 STATES of matter.

3. It’s NECESSARY for LIFE!

The Strange and Wonderful Mr. Water

Page 9: Warm Up, October 24 th , 2013

It’s NECESSARY for LIFE!

The Strange and Wonderful Mr. Water

Page 10: Warm Up, October 24 th , 2013

1. It DISSOLVES most stuff…eventually —UNIVERSAL SOLVENT

2. It occurs NATURALLY in ALL 3 STATES of matter.

3. It’s NECESSARY for LIFE!4. Its SOLID form (ice) is LESS DENSE than its LIQUID form.

Why? Yeah I know that, but why?

The Strange and Wonderful Mr. Water

Page 11: Warm Up, October 24 th , 2013

Short Chemistry Detour

So here’s a standard water molecule

OHH

Whose molecular formula is H2O

Page 12: Warm Up, October 24 th , 2013

Short Chemistry Detour

This same water molecule had a positive side and a negative side.

OHH

Page 14: Warm Up, October 24 th , 2013

So, like magnets, and the Earth;

water has two poles.

Page 15: Warm Up, October 24 th , 2013

Short Chemistry DetourSo based on that knowledge, how is water molecule

1 going to react to water molecule 2?

12

Page 16: Warm Up, October 24 th , 2013

Short Chemistry DetourThe negative end is going to attract the positive

end and vice versa.

1

2

Because of this, we say water has polarity.

THEY ACT LIKE TINY MAGNETS.

Page 17: Warm Up, October 24 th , 2013

Short Chemistry DetourNow, because water molecules act like tiny

magnets, very unique situations occur.

ADHESION COHESION

Adhesion, from adhere, verb - meaning: ‘stick

fast to (a surface or substance).’

Cohesion, containing prefix

co, - meaning: ‘together or

jointly’

Page 18: Warm Up, October 24 th , 2013

Short Chemistry DetourNow, because water molecules act like tiny

magnets, very unique situations occur.

ADHESION COHESION

Water will stick to other stuff

and defy gravity.

Water will also stick to itself!

(polarity)

Page 20: Warm Up, October 24 th , 2013

Short Chemistry DetourNow, because water molecules act like tiny

magnets, very unique situations occur.

COHESION

Water will also stick to itself!

(polarity)

Think people cooperating!

Page 22: Warm Up, October 24 th , 2013

Short Chemistry DetourNow, because water molecules act like tiny

magnets, very unique situations occur.

This random bug can balance

on water, can you do the

same with an ordinary staple?

Do you even lift?