Which explains why oxygen did not accumulate in the atmosphere right away?

Oxygen reacted with iron in the oceans

What is the best description of Earth's conditions as it first formed?

Hot surface covered with cooling magma.

The order of the layers from the inside of the Earth outwards is:

inner core, outer core, mantle, crust

What effect did stellar (solar) winds have on early planetary development?

They pushed hydrogen and helium to the outer planets

What affect did oxygen in the atmosphere have on Earth's climate?

Cooled because oxygen reduced methane in the air

Which of these is NOT an effect of having a moon?

The Earth spins the opposite direction

Geologists know when oxygen was first released into the oceans because...

Bands of red iron were first found

studbud

NCHS Earth Formation Unit 2 Review

20 termsStudBud Administration461 plays

Formation of Planet & Solar System

Flashcards20 cardsFPractice quizPHost liveL

Questions 20

Answers

1
Which of the following elements is dominant in Earth's crust?
Magnesium
Nickel
Iron
Silicon
2
Which explains why oxygen did not accumulate in the atmosphere right away?
Carbon dioxide reacted with oxygen
Cyanobacteria used oxygen for photosynthesis.
Oxygen reacted with iron in the oceans
Fish consumed all the oxygen at first
3
What is the best description of Earth's conditions as it first formed?
Cold and rocky with no life.
Rock particles heating so much that nuclear fusion began.
Water covered surface with some single-celled organisms.
Hot surface covered with cooling magma.
4
Earth separated into layers based on composition and density in which Eon?
Proterozoic Eon
Archean Eon
Phanerozoic Eon
Hadean Eon
5
(T) -OR- (F): The average pressure of Earth's layers increases from the crust to the core.
FALSE
TRUE
6
Stellar winds blew away (H) and (He) surrounding Earth - what composed Earth's atmosphere next?
Steam, Carbon Dioxide, Methane
Methane and Oxygen
Ozone
Oxygen-rich from plant photosynthesis
7
The order of the layers from the inside of the Earth outwards is:
outer core, inner core, mantle, crust
inner core, outer core, crust, mantle
inner core, outer core, mantle, crust
mantle, inner core, outer core, crust
8
Which gases were dominant in the Earth's first (primordial) atmosphere?
water vapor and oxygen
water vapor, methane and carbon dioxide
hydrogen and helium
oxygen and nitrogen
9
This is Earth's thinnest layer:
Crust
Core
Mantle
10
What effect did stellar (solar) winds have on early planetary development?
They pushed hydrogen and helium to the outer planets
They prevented accretion from occurring
They caused inner planets to spin slower.
They pushed heavy elements, like iron, to the outer planets.
11
During this Eon, oxygen began building in the atmosphere:
Proterozoic
Hadeon
Archean
Phanerozoic
12
The hottest layer of the Earth is the....
core
mantle
crust
atmosphere
13
What affect did oxygen in the atmosphere have on Earth's climate?
Cooled because oxygen reduced methane in the air
Warmed because cyanobacteria increased carbon dioxide
Cooled because oxygen absorbs energy
Warmed because oxygen is a greenhouse gas
14
Which of these is NOT an effect of having a moon?
The Earth was tilted on its axis
Heat was added during impact that created moon
less wobble on Earth's tilt
The Earth spins the opposite direction
15
This caused gases & dust to collide and build up while gravity pulled them into bigger clumps.
radioactive decay
bombardment
gravitational contraction
accretion
16
Which of the following is NOT a reason for the Hadean Eon being so hot?
bombardment
fusion
radioactive decay
gravitational contraction
17
An object is most likely to sink in water if __________.
it has large volume
it has high density
it has low density
it has large mass
18
Geologists know when oxygen was first released into the oceans because...
The first bacteria were found
The oldest layers of iron were found
Bands of red iron were first found
The first trees with green leaves were found
19
Oil floats on water. The most accurate reason for this is __________.
Oil is less dense than water.
Oil and water are anti-magnetic.
Water is heavier than oil.
Oil does not float on water.
20
The crust of the Earth is the ____ dense because it is made of _______.
most, iron and nickel
least, silicon and oxygen
least, iron and nickel
most, silicon and oxygen

NCHS Earth Formation Unit 2 Review Flashcards | StudBud