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Earth's History
Earth's History
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A review of the major events in the geologic history of Earth.
Flashcards
24 cards
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Practice quiz
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Questions
24
Answers
1
After this time mammals became the dominant organisms on Earth.
65 mya
530 mya
2.5 bya
250 mya
2
About 300 mya this happened
the last ice age started
The supercontinent Pangea formed
Dinosaurs appeared
The Earth's oceans formed
3
Rodinia began to tear apart about
300 mya
1 bya
650 bya
65 mya
4
We know about the Cambrian Explosion from studying
dinosaur fossils
meteorites
the great extinction 250 mya
fossils from the Burgess Shale
5
A mass extinction killed off 95% of all life about
65 mya
1 bya
700 mya
250 mya
6
The last ice age started about
...
and finished about ...
3.5 bya, 3.3 bya
1 bya, 700 mya
2 mya, 10,000 ya
it is still happening today
7
The dinosaurs went extinct when this happened
a giant meteor hit the Earth and exploded
disease spread among the dinosaurs
the continents flooded
massive global warming
8
The Burgess Shale is
contains fossils of organisms from the Cambrian Explosion
is found in the Canadian Rockies
all of these
a layer of rock
9
2 million years ago this started
the last ice age
the formation of a new supercontinent
global warming
the extinction of the dinosaurs
10
The continents could not form until this happened.
water evaporated
Earth got hotter
the rock basalt formed
the rock granite was formed
11
About 1 billion years ago this happened
The supercontinent Rodinia formed
The Oceans turned from green to blue
The first complex organisms showed up on Earth
The Earth was covered in ice
12
The oxygen produced by the stromatolites caused this to happen
advanced organisms appeared
the oceans turned from green to blue
continents to form
the iron in the oceans reacted with oxygen
13
Life could not survive on land until this happened.
the oceans dried up
the ozone layer formed
the continents came together
the continents split up
14
The worst extinction in the history of Earth happened 250 mya because of
disease spread among the dinosaurs
a giant meteor hit the Earth and exploded
massive global warming
the continents flooded
15
After the mass extinction 250 mya this group of animals took over the Earth.
dinosaurs
mammals
reptiles
amphibians
16
Diamonds
are mostly found in Africa
all of these
form deep underground
are erupted from special volcanoes
17
Stromatolites were producing this substance 2.5 bya.
iron
carbon dioxide
oxygen
water
18
It is thought that the water found on Earth originally came from
other planets
another solar system
the rocks that hit the Earth
stromatolites
19
When Earth cooled off enough about 4 billion years ago this happened
Life got started on Earth
the Earth was covered in ice
the continents formed
the oceans formed from a million years of rain
20
The Earth was almost completely covered with ice about
10,000 years ago
1 bya
700 mya
2 bya
21
The Cambrian Explosion
all of these
was a time when thousands of new species were appearing
started 540 mya
was an explosion of life
22
The continents could not form till this happened first
the ozone layer formed
the rock granite was produced
all of these
erosion stopped
23
Continents first started to show up about
65 mya
4.5 bya
300 mya
3.5 bya
24
After the extinction that killed the dinosaurs what group of animals took over the Earth?
Insects
Amphibians
Birds
mammals
