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Quarter 1: Earth and Life Science > Lesson 2: History of Earth's Organism > Flashcards

Lesson 2: History of Earth's Organism Flashcards

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Biology 101 flashcards
1
Q

540-485 million years ago

A

Cambrian Period

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2
Q

540-485 million years ago

What were some organisms mentioned in the Cambrian Period?

A

Trilobites and sponges

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3
Q

540-485 million years ago

What did organisms have during this time?

A

Organisms had hard body parts like shells and spines

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4
Q

440 million years ago

A

Ordovician-Silurian Extinction

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5
Q

It was the first mass extinction

A

Ordovician-Silurian Extinction

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6
Q

440 million years ago

What happened during the Ordovician-Silurian Extinction?

A

First mass extinction of organisms like trilobites, brachiopods, graptolites, bryzoans, and jawless fishes

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7
Q

420-350 million years ago

A

Emergence of trees and animals

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8
Q

420-350 million years ago

What changed in the planet?

A

Greeny ecosystem in the land mass of Earth.

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9
Q

250 million years ago

A

Pangaea

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10
Q

250 million years ago

What occured 250 million years ago?

A

Great Dying of Organisms

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11
Q

250 million years ago

What happened in the Great Dying of Organisms?

A

Greatest mass extinction due to greenhouse gases accelerated global warming

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12
Q

240-239 million years ago

A

Dinosaurs appeared

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13
Q

240-239 million years ago

How many years did dinosaurs rule the Earth?

A

150 million years

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14
Q

240-239 million years ago

What were some dinosaurs during this time?

A

Sauropod Argentinosaurus and T.rex

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15
Q

66 million years ago

A

Asteroid and New Mammals

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16
Q

66 million years ago

What did the asteroid do to the dinosaurs?

A

Asteroid wiped out all the dinosaurs

17
Q

66 million years ago

How did the asteroid wipe out the dinosaurs?

A

There was so much debris in the atmosphere that it blocked out the sun which led to climate changes, causing the dinosaurs to die.

18
Q

6 million years ago

A

Sahelanthropus

19
Q

Believed to be the earliest known human that started walking the Earth

A

Sahelanthropus

20
Q

How did the Sahelanthropus walk?

A

On four legs

21
Q

4 million years ago

A

Human starts walking upright

22
Q

1 million years ago

A

Humans develop tools, discover fire, and human interactions

800,000 discovered things which sparks and 15000 human-like went extinct

Quarter 1: Earth and Life Science (13 decks)

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