Even though water on our closed system never

Even though water on our “closed system” never leaves, we need to be very careful with the H 2 O we have.

Make 3 different sized circles in your notes. THE TOP CIRCLE SHOULD BE BIGGEST. Below that, a smaller circle… Below that, a smallest circle…

Sort of like this.

Water on Earth.

title YOUR TOP BIG pie chart: What percent of our planet is covered in water?

WHAT % of EARTH is COVERED in H 2 O? Water on Earth.

Make this your FIRST big pie chart. Don’t forget to label your pie chart!

See anything wrong with these percents?

should be a decimal points.

Distribute large graduated cylinders. What do these cylinders measure? A. area B. depth C. volume D. mass

Distribute large graduated cylinders. What do these cylinders measure? A. area B. depth C. volume D. mass

Fill the cylinder up to 970 m. L. How close are we to filling the cylinder to 1000 m. L? A. 970% B. 97% C. 9. 7% D. . 97%

Fill the cylinder up to 970 m. L. How close are we to filling the cylinder to 1000 m. L? A. 970% B. 97% C. 9. 7% D. . 97%

What am I contaminating (ruining) your water with? A. Sugar (C 6 H 12 O 6) B. Salt (Na. Cl)

What am I contaminating (ruining) your water with? A. Sugar (C 6 H 12 O 6) B. Salt (Na. Cl)

So, of all water that covers about 70. 9% of Earth, 97% is mixed with SALT (Na. Cl)

WHAT % of EARTH is COVERED in H 2 O? Water on Earth.

Water on Earth. WHAT % of EARTH is COVERED in H 2 O? What % of EARTH’s H 2 O is FRESHWATER?

What % of ALL Earth’s water is FRESH water? 97% SALT water

What % of ALL Earth’s water is FRESH water? 97% SALT water 2% +1%= 3%

Only 3% of Earth’s total water is FRESH water? 3 97% SALT water = 1 + 2 H S RE F %

but MOST of this 3% FRESHWATER NOT AVAILABLE for us to use? WHY? 3 97% SALT water = 1 + 2 H S E R F %

illustrate with cylinders…

But WHY is 2/3 rds of this tiny amount of freshwater UNAVAILBLE for us to use? 2/3 rds of this FRESHWATER are ICE/GLACIERS at POLES-UNAVAILBLE! F % 3 H S RE 97% salt water

So then, how much of all Earth’s total water is us to use? available for get tiny graduated cylinders…

What % of Earth’s water is available for US to drink & agriculture (farms)? <1%!!!!! <1% freshwater, available for us.

Why is LESS than 1% of our H 2 O usable? POLLUTION

Hard water has too much Ca & Mg!

Water on Earth. WHAT % of EARTH is COVERED in H 2 O? What % of EARTH’s H 2 O is FRESHWATER? What % of FRESHWATER is AVAILABLE/USABLE?

Of our 3% freshwater, What percent of total freshwater is available/usable?

Do all of us get most of our freshwater from lakes or groundwater?

Do all of us get most of our AVAILABLE freshwater from lakes or groundwater?

Water on Earth. WHAT % of EARTH is COVERED in H 2 O? What % of EARTH’s H 2 O is FRESHWATER? What % of FRESHWATER is AVAILABLE/USABLE?

clean-up cylinders…. finish pie charts for

ticket out the door

1. Is there more freshwater than salt water?

1. Is there more freshwater than SALT WATER?

2. Is most our freshwater solid, liquid or gas?

2. Is most our freshwater SOLID, liquid or gas? It’s ICE baby! It’s SOLID!!!!

3. Do we get more freshwater from lakes or wells? careful…

3. Do we get more freshwater from lakes or wells? careful…

How lucky are we to be living near so much surface freshwater?

4. Is there more freshwater in rivers or our air? tiered Q…

4. Is there more freshwater in rivers or our AIR? Our atmosphere is over a mile thick and very humid in some places. Rivers are thin hairline crevasses on Earth’s 30% crust where water flows very quickly from mountains out to salty sea!

What’s missing?

What’s missing? frozen at poles

Does this check out?

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STOP! Do next slide after doing mineral lab!

Do next when we get to cells!