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Chemistry A > C9 : Life > Flashcards

C9 : Life Flashcards

1
Q

When did life first begin to appear

A

3.4 billion years ago

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2
Q

What simple organism carried out photosynthesis and allowed for other life forms to appear

A

Algae which appeared 2.7 billion years ago

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3
Q

How did algae allow for other life forms to appear

A

Algae would carry out photosynthesis and allowed for the oxygen in the atmosphere to increase, this allowed other complex life forms to develop as they could now respire

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4
Q

What’s the word equation for photosynthesis

A

Carbon dioxide + water = glucose + oxygen

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5
Q

What is the word equation for respiration

A

Glucose + oxygen = Carbon dioxide + water

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Chemistry A (25 decks)

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