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Climate change Flashcards

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Biology 101 flashcards
1
Q

When did the first ice age happen

A

2 billion years ago

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2
Q

What happened in the relatively hot periods of times?

A

In the hot times there were no ice even on the poles.

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3
Q

When did the snowball ice incident take place?

A

650 million years ago

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4
Q

What is the snowball ice

A

The snowball ice is when the earth was covered by ice and snow

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5
Q

What is slush

A

Slush is melting ice.

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6
Q

How did the earth look 650 million years ago

A

The continents at that time were not at the same position as they are today but they were all joined together.

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7
Q

When did the first asteroid collide?

A

470 million years ago

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8
Q

What was the result of this asteroid collision?

A

The result of this was that the dust blocked the sun’s rays which triggered another ice age.The Earth became colder and the ice spread to the poles and the sea levels fell.

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9
Q

when did the Chicxulub hit earth?

A

The Chicxulub hit earth 67 million years ago.

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10
Q

What was the result of the Chicxulub hitting earth?

A

-Dinosaurs went extinct
-Devestation rained
-The result where it hit(Mexico) was as large as 100 million atomic bombs
-there was rock thrown to the whole earth which resulted in Hurricanes and tsunamis.
-Because of the dust being thrown into the atmosphere the sunlight was blocked so the plants could not photosynthesis.

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11
Q

How much percent of species went extinct

A

about 75% or up to three-quarters.

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12
Q

How many different asteroids are known to exist.

A

175

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13
Q

Smaller asteroids are called

A

meteoroids.

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14
Q

When meteoroids enter earth they are called?

A

meteors

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15
Q

another name for Meteors

A

Shooting stars

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16
Q

Why do people call Meteors shooting stars?

A

because they look like stars moving very fast in the sky.

17
Q

Are Meteors any harm?

A

No, they are mostly no harm as they burn in the atmosphere because of the rising temperatures of friction.

18
Q

Are Meteors any harm?

A

No, they are mostly no harm as they burn in the atmosphere because of the rising temperatures of friction.

19
Q

What happens if a Meteor does hit earth?

A

It creates shock waves.

20
Q

in ______ a meteor exploded over __________ and shattered __________

A

2013, Russia, Windows.

21
Q

But if Meteors do collide with Earth they are called?

A

Meteorites

22
Q

How many meteorites are found on earth’s surface each year?

A

about 500

23
Q

What do scientists look for when assessing the possible risks a huge object can have on earth?

A

-the mass and diameter
-The closest possible approach to earth

24
Q

How many kilometers away did the 2006 DP14 pass from Earth?

A

2,400,000km

25
Q

If 2006 DP14 collided with Earth what would happen?

A

an explosion equivalent to 20 million tonnes of explosives would happen.

26
Q

For how long was our earth stable

A

for the last 2000 years

27
Q

Why is our temperature increasing?

A

Because there is too much Carbon Dioxide in the air which traps heat.

28
Q

What happens if there is too much energy in the atmosphere

A

Hurricanes and Cyclones take place and extreme weather conditions.

29
Q

What happened with the Tropical Cyclone of Idai?

A

The tropical Cyclone of Idai hot South Africa. It was part of the worst storms and killed up to 1300 people.
Severe floods also took place.

30
Q

The changing climate makes it hard to?

A

Predict rain fall. Rains come late, or don’t come, or come very heavy.

31
Q

Monsoons are welcome but why not in 2019 and after.

A

It’s because in 2019 and in later years Monsoon weather lead to tons of floods in the southern part of Asia

32
Q

Droughts lead to?

A

Forest fires.

33
Q

Why do sea levels rise?

A

-Sea levels rise because Earth’s temperature increases which makes expands water because Water expands with heat.
-The melting glaciers add extra water to the oceans.

33
Q

Why do sea levels rise?

A

-Sea levels rise because Earth’s temperature increases which makes expands water because Water expands with heat.
-The melting glaciers add extra water to the oceans.

34
Q

What is the rate of sea levels rising?

A

3mm per year.

35
Q

How many people are risks for floods?

A

600 million

36
Q

Many ___________ are built on the coast.

A

Megacities

37
Q

Examples of mega cities?

A

Shangai, Mumbai, LA

38
Q

Results of climate change?

A

-Unpredictable rain
-Rising sea levels
-Extreme weather events

Science (16 decks)

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