15.1 Physical 15.1 Physical OceanographyOceanography

Pages 384 - 391Pages 384 - 391

Goal 1Goal 1

Explain how oceans Explain how oceans originatedoriginated

• Water from Water from space…space…– Comets Comets

•Water Water released on released on collisioncollision

• Water from space…Water from space…

– Meteorite evidenceMeteorite evidence

•Contain 0.5% waterContain 0.5% water

•Same as earthSame as earth

• Water from volcanoes…Water from volcanoes…

– Volcanic gas mostly COVolcanic gas mostly CO22 and H and H22OO

Goal 2Goal 2

Discuss the distribution of Discuss the distribution of Earth’s waterEarth’s water

Globe activityGlobe activity

Which hemisphere appears to have Which hemisphere appears to have more water?more water?

• 71% surface area of Earth is ocean71% surface area of Earth is ocean– Mostly in southern hemisphereMostly in southern hemisphere

• 3800 m = average depth3800 m = average depth

Globe activityGlobe activity

What percent of the Earth’s equator is What percent of the Earth’s equator is ocean water, what percent is land?ocean water, what percent is land?

• Earth’s waterEarth’s water

– Oceans = Oceans = 97%97%

– Ice caps = Ice caps = 3%3%

Globe activityGlobe activity

Can you travel through every ocean Can you travel through every ocean without leaving water?without leaving water?

• Major oceansMajor oceans– PacificPacific– AtlanticAtlantic– IndianIndian– ArcticArctic

– AntarcticAntarctic

Globe activityGlobe activity

Find all 5 oceansFind all 5 oceans

• SeasSeas– SmallerSmaller– Partly / mostly landlockedPartly / mostly landlocked– Mediterranean SeaMediterranean Sea– Carribean SeaCarribean Sea– Bering SeaBering Sea

Globe activityGlobe activity

Find more than 5 seasFind more than 5 seas

• Sea IceSea Ice

– Ice floatsIce floats– SeasonalSeasonal

Question 1Question 1

Why does ice float if we learned that Why does ice float if we learned that when a substance is cold, it is when a substance is cold, it is

denser and sinks in relationship to denser and sinks in relationship to its warmer counterpart?its warmer counterpart?

Question 2Question 2

Contrast what is happening to the ice Contrast what is happening to the ice cap in the Arctic and the ice cap in cap in the Arctic and the ice cap in the Antarctic during the month of the Antarctic during the month of December. Do the same thing for December. Do the same thing for

the month of June.the month of June.