Oceans and Ocean Life

What percent of the ocean's water is salt?

• 1%

• 3.5%

• 97%

• 24%

Which of the following contribute to the saltiness of the ocean?

• runoff from rivers and streams

• living organisms in the ocean

• precipitation

• factories dumping waste in the ocean

How is a hydrothermal vent different from a volcano?

• hydrothermal vents release mineral water and volcanoes release magma

• they are pretty much the same - no differences

• hydrothermal vents make the ocean saltier while volcanoes do not

• hydrothermal vents are much cooler than volcanoes so they don't erupt as much

Where can hydrothermal vents be found?

• only in the Pacific Ocean

• all along the Mid Ocean Ridge

• only near underwater volcanoes

• Anywhere on Earth

Why was the discovery of hydrothermal vents so remarkable?

• They showed us a new life form that we didn't know existed

• They explained how the sea floor was spreading

• They explained how the ocean got salty

• They helped us discover how deep the ocean really is

Tags

NGSS.MS-LS2-3

What is the deepest part of the ocean that we know of?

• Challenger Deep

• Mid Ocean Ridge

• Off the coast of Hawaii

• Sienna Deep

What is the huge, flat area of the ocean floor called?

• seamounts

• trenches

• abyssal plain

• continental shelf

The gradually sloping area at the edge of the ocean is called:

• abyssal plain

• continental slope

• continental shelf

• Galapagos Rift

Which ocean is located at point D?

• Pacific

• Atlantic

• Southern

• Indian

What is the primary source of energy for ocean life?

• Sunlight

• Hydrothermal vents

• Tidal forces

• Underwater volcanoes

Tags

NGSS.MS-LS1-6