What major climate event occurred around 50 million years ago?
The Fern That Cooled the Planet

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Science, Geography, Biology
•
11th Grade - University
•
Hard
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5 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Earth's magnetic poles reversed.
Earth shifted from a warm greenhouse state to an ice age.
Earth experienced a massive volcanic eruption.
Earth transitioned from an ice age to a warm period.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What surprising discovery was made in the Arctic sediment cores?
Evidence of ancient human settlements.
Fossilized remains of dinosaurs.
A column of tiny fossilized Azolla ferns.
Traces of extraterrestrial life.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
How did Azolla ferns manage to thrive in the Arctic Ocean?
They were transported by migrating birds.
They adapted to saltwater conditions.
They were protected by a layer of ice.
They grew in a freshwater layer over the saltwater.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What role did Azolla play in reducing atmospheric carbon dioxide?
It increased volcanic activity.
It released oxygen into the atmosphere.
It absorbed carbon dioxide through photosynthesis.
It blocked sunlight from reaching the Earth's surface.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What potential future use is being explored for Azolla?
As a source of renewable energy.
To increase agricultural productivity.
To help cool the planet by reducing greenhouse gases.
As a replacement for fossil fuels.
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