Science Oly. Quiz #2

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Test your knowledge with Division B quiz stuff today! Made by a fellow Sci. Oly. Student.

---Meteorology - Composition and evolution of the Earth's atmosphere---

2. What first name or nickname would you like us to use?

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2. ---Meteorology - Composition and evolution of Earth's atmosphere--- Was 'Early Earth's' atmospheric composition different or the same as ours today?

Different

Same

Unknown by scientists

Earths early atmosphere's composition was mostly H2, He.

Explanation

Earths early atmosphere's composition was mostly H2, He.

3. The gasses make up our atmosphere. What are they?

Carbon Dioxide (78%), Nitrogen (21%), Oxygen (0.03%), Other (the rest)

Oxygen (78%), Nitrogen (21%), Carbon Dioxide (0.03%), Other (the rest)

Nitrogen (78%), Oxygen (21%), Carbon Dioxide (0.03%), Other (the rest)

Carbon Dioxide (78%), Oxygen (21%), Nitrogen (0.03%), Other (the rest)

Oxygen (78%), Carbon Dioxide (21%), Nitrogen (0.03%), Other (the rest)

Nitrogen (78%), Carbon Dioxide (21%), Oxygen (0.03%), Other (the rest)

4. Iron (Fe) is a very abundant element in the earth's crust so much is released by the chemical disintegration of minerals contained in rocks.

True

False

5. What caused the Earth's Oceans to form?

Certain gasses in the atmosphere began to become heavier and began to fall towards the earth, turning into water.

Water first was brought here by a meteor that struck Earth, and then it began to build up.

Huge glacial deposits that existed long ago melted as ice ages began to go away.

6. The gasses in the First Atmosphere in Earth were H2 and He. Why did it change?

They were lost into space.

They changed into the current gasses.

They simply disappeared.

Unknown by Scientists.

7. Oxygen was dominating the atmosphere of early Earth so photosynthesis would have created a net gain of oxygen first in the ocean and later in the atmosphere. Eventually with less oxygen in the atmosphere respiration would have balanced photosynthesis except when burial removed the organic material from the oxygenated water or air. Before oxygen could thin out in the atmosphere it must have oxidized reduced ions in seawater.

True

False

8. Why were they lost into space?

A meteor struck the Earth around the time the gasses disappeared, resulting in them being literally 'blown' off the Earth.

Earth's gravity is not strong enough to hold lighter gases

The aliens came and took them away.

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