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Unit 4: Formation of the Earth/Solar System Flashcards | StudBud
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Unit 4: Formation of the Earth/Solar System
Unit 4: Formation of the Earth/Solar System
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Answers
1
The core of Earth is made of...
carbon
iron
uranium
lead
2
Cratons are about ___ million years old.
20
180
280
2500
3
True or False: When a continental plate and oceanic plate converge, a deep ocean trench and volcanic arc are formed.
true
false
4
Zircon crystal is good for finding ___
hydrogen
carbon
uranium
nitrogen
5
Continental crust first formed when one area of the mantle ___ and became solid.
heated
boiled
cooled
released
6
The time it takes a radioactive isotope to decay to half its original amount.
50% life
Uranium 238
half-note
half-life
7
At convergent boundaries, crust is ___.
recycled
created
8
The oldest crust on Earth is found ...
in cratons.
surrounding craters.
under Mt. Everest.
In the middle of the oceans.
9
Which plates are older?
Oceanic
Continental
10
Gravity pulled the gas and dust in a circle around the Sun forming a(n) ___ .
nebula
fusion
accretion disk
planet
11
The following can be found in an accretion disk:
Gas
Dust
Ice
All of the above
12
In radiometric dating, the parent isotope is...
unstable
stable
radioactive and unstable
radioactive
13
Two oceanic tectonic plates move ___ each other, creating a ___ plate boundary.
move away from, divergent
towards, convergent
move away from, convergent
towards, divergent
14
The cloud of dust and gas that would form our Sun is called a...
stellar nebula
astroid belt
accretion disk
oort cloud
15
Uranium 238 decays into...
Nitrogen
Carbon
Lead
Uranium 235
16
About 4.6 billion years ago, our solar system was...
a cloud of dust and gas
fully formed
non-existent.
full of proto-planets
17
Proto- means
large
old/late
young/early
small
18
A parent istope decays into...
none of the above.
a son isotope
a child isotope
a daughter isotope
19
Oceanic and continental plates move ___ each other, creating a ___ plate boundary.
towards, convergent
towards, divergent
move away from, divergent
move away from, convergent
20
Seafloor spreading originates...
at transform boundaries.
at convergent boundaries.
at mid-ocean ridges.
21
At divergent boundaries, crust is ___.
created
recycled
22
The proto-planet which is thought to have crashed into proto-Earth…
Phobos
Thor
Deimos
Theia
23
Objects in the solar system are all around ____ years old.
4.5 billion
25 million
4.5 million
14 billion
24
The force(s) that pulls matter together...
Fussion
Gravity
Gravity & Electrostatic
Electrostatic
25
The formation of all of the planets, moons and asteroids of the solar system occurred
Over a billion years
at the same time as the Sun.
at approximately the same time
26
The smaller chunks that did not form ___ became smaller objects in the solar system like moons, asteroids, and meteors.
dust
planets
rock
helium
27
The movement of the plates called ___ makes the recycling of the crust possible.
accretion theory
bombardment
plate tectonics
asteroid impact
28
The most widely accepted theory of the Moon’s origin:
Co-formation Theory (formed at same time)
Capture theory (roped in by Earth’s gravity)
Fission theory (Earth spun fast and cast off Moon)
Collision theory (object collided with Earth)
29
Solar winds...
Red and Yellow
Are charged particles
Strip planets of their atomospheres
provide a gentle breeze
30
True or False: Mid-ocean ridges are the locations of the oldest oceanic crust.
True
False
