HOW IS WATER ESSENTIAL TO LIFE?

FACTS ABOUT WATER

• • • • • • • What percent of the planet is water?

How much is fresh water?

Where is most of the fresh water?

25% of the world’s drinking water comes from this lake.

How many oceans are there?

What are the names of the oceans?

What percent of your body is water?

• • • • • • • ~ 75% 3% Icebergs Great Lakes One Atlantic, Pacific, Indian, Arctic, Antarctic ~70%

OCEANS OF OUR PLANET

WHAT DOES THE OCEAN FLOOR LOOK LIKE?

• • • • • Continental shelf : The extended perimeter of each continent Continental Slope : Point of increasing slope at end of continental shelf Trench : Long narrow ditch Ocean Floor : Bottom of ocean Ridge : Underwater mountain range

WHAT ARE HYDROTHERMAL VENTS?

HOW DO WE EXPLORE THE OCEANS?

• • • Sonar: Using sound waves Alvin: First deep sea submersible able to carry passengers (1964) can now dive to 14,764 ft.

Jason Jr: Submersible robot that explored the Titanic