1. Copy this week’s agenda!
Walk-In
Take out notebook, folder, pencil box and agenda.
Copy this week’s agenda!

2. Walk-in
How do you think scientists know facts about the ocean and its lifeforms?

3. Some Answers
Scientists have dived below the ocean surface to observe and collect samples.
Engineers have created vehicles that can go deep into the ocean to observe.
Researchers at the shoreline have observed waves, shore life and weather.

4. What do we know about the oceans?
Watch this video clip about the oceans, its mysteries and its lifeforms!

5. How do we know all this?!?
The branch of science called…

6. Oceanography

7. Oceanography
Oceanography is the branch of science that studies the ocean, its structures and the ocean floor.

8. Why Study Oceanography?
Oceans comprise (make up) 71% of the Earth’s surface.
Oceans contain 97% of the water on or near the Earth’s surface.
Oceans can be a source of food.
Oceans have a major effect on weather.
They provide resources near the shoreline (food, plants, minerals).

9. Ocean vs Sea
Seas are smaller and usually where land and oceans meet.

10. Exploring the Oceans

11. Exploring the Oceans
Researchers use SUBMERSIBLES (small vehicles that can go under water) to explore the ocean and its floor.
Submersibles have to withstand very high pressure from the water, and very cold temperatures.
They need powerful lights, and a reliable oxygen supply for the researchers.
Submarines are larger, often used by the military.

12. What does a submersible do?
Watch this video clip of “Alvin”, a submersible built in 1964 and named after its creator, Allyn Vine.
Alvin has made more than 4,700 dives for research!