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Formation of the Solar System Flashcards | StudBud
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Formation of the Solar System
Formation of the Solar System
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Questions
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1
The time it takes for one half of a sample of material to decay is called its...
absorption time
half life
decay rate
2
What is the heliocentric model of the universe?
Moon at the center, sun orbits it.
Sun at the center, planets orbit it.
Earth at the center, sun orbits it.
3
Why would a scientist use Uranium radiometric dating instead of Carbon-14 radiometric dating?
if the sample is really old.
if the sample is found on earth
If there is not much sample left to test
4
Why isn’t the earth covered in impact craters caused by meteorites like the moon is?
Because plate tectonics has “recycled” old earth.
Because they hit the oceans more often
Because they don’t hit earth as often as they hit the moon.
5
How did our moon form?
When a meteorite hit early earth.
In the same way Earth did.
When a piece of earth just fell off.
6
A sample of 100 grams has a half-life of 20 years. How many grams are left after 2 half lives?
50
100
25
7
The “clumping up” of debris that forms planets is called...
disaggregation
Great Clumping
accretion
8
Earth has three main layers that formed after it cooled. The middle layer is called the...
Crust
Core
Mantle
9
After the earth began to cool, how did the elements differentiate?
Heavy elements stayed in crust and light went to mantle.
Light elements stayed in crust and heavy sank to core.
Light elements stayed in crust & heavy went to mantle.
10
Which model of our solar system is true?
heliocentric model
geocentric model
11
What causes the biggest impact crater from a meteorite?
angle of impact
tragectory
size
12
How did a meteorite impact cause a massive extinction event 65 million years ago?
impact knocked earth off its tilt & caused climate change.
The fireball it produced burned everything.
The effect of the impact caused the sky to go dark.
13
Early earth was...
icy
covered in water
molten
14
How do scientists know how old the Sun, Earth and Moon are?
Radiometric dating of Earth and Moon rock
Absolute dating of the surface of the Sun
Relative dating of Earth rock
15
What formed our star, the sun?
A supernova collision
a Red Giant
a nebula
16
What elements are in Earth’s core today?
Iron and Carbon
Helium and Nickel
Iron and Nickel
17
How do scientists think water formed on Earth?
From meteorites carrying drops of water and salt.
From the outgassing of the molten earth.
From the elements that were present on early earth.
18
Atoms become radioactive when they...
have too many or too few protons
have too many or too few electrons
have too many or too few neutrons
19
Radiometric dating of rock analyzes the decay of ____________ to determine the age of rock.
electrons
stable atoms
isotopes
20
Carbon-14 decays into Nitrogen-14. This is called a ____ isotope decaying into a ___ isotope.
mother, daughter
father, son
parent, daughter
