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Quarter 1: Earth and Life Science > Lesson 1: History of Earth > Flashcards

Lesson 1: History of Earth Flashcards

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Biology 101 flashcards
1
Q

4.5 billion years ago

A

Dense Cloud of Interstellar Gas and Dust

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2
Q

4.5 billion years ago

What happened to the dense cloud of interstellar gas and dust?

A

It collapsed into a swirling disc of matter that got hotter and hotter until such two element fuse together

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3
Q

4.5 billion years ago

What was formed from the dense cloud of interstellar gas and dust

A

Sun and solar system

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4
Q

4.5 billion years ago

Sun is formed by:

A

fusing hydrogen and helium

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5
Q

4.5 billion years ago

How were planets formed 4.5 billion years ago?

A

All matters begin to clump together as a seedling of planets and moons.

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6
Q

4.5 billion years ago

How were inner planets formed?

A

Rock material closer to the sun formed the inner planets like Mars and Earth

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7
Q

4.5 billion years ago

What is in the farthest region from the sun?

A

The coldest region that is mostly made of ice, liquid, and gases

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8
Q

4.5 billion years ago

What was the first Earth called?

A

Baby Earth

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9
Q

4.5 billion years ago

What is Baby Earth composed of?

A

Active volcanoes that spews out gases like hydrogen sulfide, methane, and CO2 which formed the first atmosphere

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10
Q

3.8 billion years ago

A

Hot or Young Earth

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11
Q

3,8 billion years ago

Why is it called the Hot or Young Earth

A

There were no oceans and all water existed as gas

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12
Q

3.7 billion years ago

A

Water World Earth

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13
Q

3,7 billion years ago

Why was it called the Water World Earth?

A

The planet cooled down enough to condensate the gas to become water/liquid. The first ocean was formed

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14
Q

3,7 billion years ago

What was the first life/organism?

A

Microscopic organism life appeared due to H20/water

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15
Q

3.3 billion years ago

A

The first continent emerged from the ocean

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16
Q

3.3 billion years ago

What were the first continent called?

A

Cratons

17
Q

2.4 billion years ago

A

Ice Age of Earth

18
Q

2.4 billion years ago

What was the first photosynthesizer?

A

Cyanobacteria became the first photosynthesizer that give out oxygen

19
Q

2.4 billion years ago

Why was it called the Ice Age of Earth?

A

Oxygen from the photosynthesizers gives lower levels of carbon dioxide. That makes it icy cold.

20
Q

1.1 billion years ago

A

Rodinia and Pannotia

21
Q

1.1 billion years ago

What was the first supercontinent called?

A

Rodinia

22
Q

1.1 billion years ago

What was the second supercontinent called?

A

Pannotia

23
Q

1.1 billion years ago

What caused supercontinents to emerge?

A

As the atmosphere changes, it makes continents break up and reassemble.

24
Q

250 million years ago

What occured 250 million years ago?

A

Pangaea

Quarter 1: Earth and Life Science (13 decks)

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