Oceans and Our Atmosphere

When did oceans form on Earth?

• After the appearance of life

• Early in Earth's history

• During the dinosaur era

• At the beginning of the human era

What was one of the sources of water for the formation of oceans?

• Gases from the sun

• Liquid water from underground reservoirs

• Gases (water vapor) from volcanoes

• Water imported by humans

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Which process contributed to the accumulation of water on Earth's surface?

• Photosynthesis

• Condensation of water vapor

• Evaporation from oceans

• Absorption by plants

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How did the cooling of Earth affect ocean formation?

• It caused water to freeze

• It allowed water vapor to condense into liquid

• It increased volcanic activity

• It led to the formation of glaciers

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1. The Earth's oceans and atmosphere were formed from water and gases found in

• space rocks

• plants

• space

• oceans

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1. The Earth's ocean and atmosphere were formed from water and gases found in space rocks, where were the water and other gases trapped once Earth was a large molten rock with a solid crust?

• in the magma inside Earth

• in the plants

• in space

• in the oceans

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NGSS.MS-ESS2-4

According to scientists, the Earth's surface water mass percentage is approximately 0.023% of the planet's total mass, this can also be written as 230ppm. Scientists found space rocks with concentrations from 500 to 12,000ppm of water. Based on the space rocks found, what can we canclude?

• There’s very little water in space rocks to have filled the Earth’s oceans.

• There’s plenty of water in space rocks to have filled the Earth’s oceans.

• There is some water in space rocks, but not enough to have filled the Earth's oceans.

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1. When Earth (our giant space rock) cooled on the surface and formed a solid crust, it trapped the water and other gases in the magma/molten rock beneath its surface. How were the water and other gases released?

• The water leaked out of the soft soils on the surface of Earth.

• 1. Volcanoes released and continue to release water vapor and gases from the interior of the Earth. 

• 1. Volcanoes stopped water vapor and gases from leaving the interior of the Earth. 

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NGSS.MS-ESS2-4

What kinds of gases released from volcanoes created the early atmosphere?

• Water vapor (H2O gas)

• carbon dioxide (CO2)

• sulfur dioxide (SO2) and hydrogen sulfide (H2S)

• chlorine (Cl)

Volcanoes released more of these two gases as the early atmosphere formed:

• Water vapor (H2O gas)

• carbon dioxide (CO2)

• sulfur dioxide (SO2) and hydrogen sulfide (H2S)

• chlorine (Cl)