Earth's Oceans 15.1

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Challenger

First Ship to use sophisticated measuring devices to study the ocean

Water vapor and Carbon Dioxide

Gases emitted by volcanoes contain mostly

Sea Level

Global __________ has risen and fallen by hundreds of meters in response to warm periods and ice ages.

More than 20,000 km

How far does the Atlantic Ocean extend from north to south?

ALMOST 4.6 billon years

How long have oceans on Earth existed?

61 %

How much of the NORTHERN HEMISPHERE is covered by oceans?

81%

How much of the SOUTHERN HEMISPHERE is covered by by oceans?

97%

How much of the WATER found on Earth is contained by the OCEANS?

Oceans

In Earth's early history, water vapor in the atmosphere condensed into the ....

Comet impacts

One possible source of Earth's water

TOPEX/Poseidon

Satellite used to monitor ocean surface temperatures

Oceanography

Scientific study of Earth's oceans

Alvin

Submersible used to study the deep oceans

Pacific

The Earth's largest ocean

SOUTHERN Hemisphere

The Indian Ocean is located mainly in the ....

Atlantic, Pacific, INDIAN

The three major oceans

Ultraviolet Radiation

The total amount of water on Earth stays the same because water molecules in the atmosphere are destroyed by ...

Rising

Today, average global sea level is slowly _________ at a rate of 3 mm per year.

Volcanism

Water is still being added to the Earth's hydrosphere by...

3800 meters

What is the average depth of the oceans?

North of the ARCTIC CIRCLE

Where is the Atlantic Ocean known as the Arctic Ocean?

Because approximately 71% of its surface is covered by oceans

Why is the earth known as the "Blue Planet"?

Tectonic

__________ forces that lift or lower portions of the sea floor also affect sea level.

Frozen Ice Caps

Approximately 3% of Earth's water is located in the _____________ of Greenland and Antarctica, and in rivers, lakes, and underground sources.

SONOR

Device that uses echoes to map features of the ocean floor


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