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3A Earth Science Unit 7 Review Flashcards | StudBud
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3A Earth Science Unit 7 Review
3A Earth Science Unit 7 Review
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1
Which is wrong about absolute aging?
Carbon-14 is an example
Relies on half life
It is less accurate than realative dating
It is more accurrate than realative dating
2
Which era is known for the diversification of marine animals?
Cenozoic
Paleozoic
Mesozoic
None of the above
3
What is a half-life (in science)?
a video game
waves given off by radioactive material
the amount of time for half a radioactive sample to decay
half of an element
4
Cambrain explosion happened during which era?
Mesozoic
Phanerozoic
Paleozoic
Cenozoic
5
Law of Cross Cutting Relationships states
igneous rocks are older than the rocks they have intruded
Igneous rocks and faults are younger than the rocks they have intruded.
igneous rocks really know how to rock out!
igneous rocks don't exist so they cannot intrude
6
Fossils tell us ______.
about animals that lived in the past
all of these answers
how today's animals are similar to past life
about how the earth has changed
7
How is absolute aging of living things done?
Uranium Dating
Carbon Dating
Relative Dating
True Dating
8
What is absolute aging?
Aging based on number of organisms in the rock
Aging based relationshp to other rocks
Aging based on years since the rock has formed from radioactive decay
Aging based on its location to rock layers
9
Determine the index fossil
C
A
D
B
10
Cyanobacteria added this gas to Earth's atmosphere
O2
H2O
CO2
C6H12O6
11
What happens in a food web if the Sun is blocked?
Just the producers would die.
Just the herbivores would die.
The entire food web would eventually collapse.
Just the carnivores would die.
12
What was a major event that occurred during the Cretaceous period?
The dinosaurs died because of a large asteroid.
The martians came and put Earth into a spaceship.
The Moon came into Earth's orbit.
The dinos. were introduced to Nintendo Labo.
13
The early Earth's atmosphere was lacking:
Carbon Dioxide
Oxygen
Water
Lightning
14
What are the 4 major Earth systems?
bioshphere, atmosphere, hemisphere, cryosphere
cryosphere, exosphere, troposphere, biosphere
hydrosphere, biosphere, geosphere, atmosphere
15
What is uniformitarianism?
The idea all students should wear school uniforms.
The idea the same processes occur now as they always have.
The idea the Earth changes only when catastrophes occur.
A huge word I don't know the meaning of.
16
Law Of Superposition
The age of each layer of rock
The age of rock compared to the age of rock layers
lower rock layer is the oldest,&the higher ones are younger
higher rock layer is the oldest,&the lower ones are younger
17
What aspect of radioactive decay is useful for absolute aging of samples?
speeds up under high pressure
occurs at a constant rate
slows down in very dense samples
changes based on temperature
18
Relative dating tells us
The age of a rock in years
The difference in color between rock
Whether one rock is older or younger than other rocks
Where a rock or came from
19
law of horizontality
rocks are formed with no pattern
rocks are formed diagnoaly
rocks are fromed horizontaly
rocks are formed in a verticle line
20
This era is known as the Age of Reptiles.
Paleozoic
Precambrian
Mesozoic
Cenozoic
21
How does the following cause mass extinction?
lava kills animals
ash blocks out the sun
changes oxygen levels in the ocean
