Chemical Processes in Earth and Life Systems

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Science
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Hard
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15 questions
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1.
FLASHCARD QUESTION
Front
What biological process is responsible for introducing free oxygen to Earth’s atmosphere?
Back
Photosynthesis is the biological process that introduced free oxygen to Earth’s atmosphere.
2.
FLASHCARD QUESTION
Front
Why is it believed that life on Earth evolved in the oceans before appearing on land?
Back
Ocean water offered protection against harmful radiation until an atmosphere could form.
3.
FLASHCARD QUESTION
Front
What explains the buildup of free oxygen in Earth's atmosphere around two billion years ago?
Back
Photosynthetic organisms became more common on Earth.
Tags
NGSS.HS-LS2-5
4.
FLASHCARD QUESTION
Front
What positive impact did the weathering of rocks have on Earth's lifeforms?
Back
The weathering of rocks increased, producing soil and minerals that better supported life.
Tags
NGSS.MS-LS2-3
NGSS.MS-LS2-4
5.
FLASHCARD QUESTION
Front
How does the development of the Earth's surface relate to the development of life on Earth?
Back
The changing surface of the Earth determined what kinds of organisms could exist.
Tags
NGSS.HS-ESS2-7
6.
FLASHCARD QUESTION
Front
Define photosynthesis.
Back
Photosynthesis is the process by which green plants and some other organisms use sunlight to synthesize foods with the help of chlorophyll.
Tags
NGSS.HS-LS1-5
NGSS.HS-LS2-5
7.
FLASHCARD QUESTION
Front
What is the significance of unicellular life in Earth's history?
Back
Unicellular life was crucial for the oxygenation of the atmosphere through photosynthesis.
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