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Earth's Layers
Earth's Layers
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Florida 7th Grade Earth's Layers, Earth's Systems, Earth's Landforms.
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1
Which best explains why landforms are not permanent?
Gravity pulls on landforms molding them to spherical shape.
Landforms are shaped by erosion and uplift.
Once created landforms do not change.
Earth’s magnetic field compresses the surface.
2
Earth believed to be in the shape of a flat disk, scientists know is really shaped like a_____.
pentagon
sphere
elliptical
square
3
Which layer of Earth is the most dense?
inner core
outer core
crust
mantle
4
The crust and uppermost mantle make up Earth's ____.
asthenosphere
core
lithosphere
continents
5
Earth’s core is mostly made of which metal?
iron
gold
nickel
aluminum
6
Find the density of an object that has a volume of 20 cm3 and a mass of 56 g.
2.8 g/cm3
4.3 g/cm3
1.7 g/cm3
3.8 g/cm3
7
Which belongs to Earth’s geosphere?
mountains
foxes
oceans
carbon dioxide
8
Flat, raised areas of land
mountains
plataeus
basins
plains
9
What is C?
biosphere
hydrosphere
geosphere
atmosphere
10
All organisms on Earth and the environments in which they live.
geosphere
biosphere
cryosphere
hydrosphere
11
Largest layer of Earth
mantle
core
asthenosphere
lithosphere
12
Which is NOT a way scientists have been able to study Earth’s interior?
measuring earthquake wavestraveling through Earth’s surface
digging deep wells into Earth’s core
gathering samples from the liquid outer core
weigh rocks found near the outer core determining densities
13
Large, flat areas of land
plains
basins
plateaus
mountains
14
The partially molten layer of Earth's mantle
lithosphere
asthenosphere
uppermost mantle
lower mantle
15
An example of a raised, flat area is/are the ____.
Appalachian Mountains
Coastal Plains
Grand Tetons
Colorado Plateau
16
Describe a plain.
High elevation, low relief
Low elevation, low relief
High elevation, high relief
Low elevation, high relief
17
Contrast lithosphere and asthenosphere
lithospher is rigid, asthenosphere is semimolton and flows
lithosphere is above the crust, asthenosphere is below
lithosphere is cooler to say than asthensphere
litosphere is liquid, asthenosphere is solid
18
More than 70 percent of Earth is covered in water. Why is water considered a scarce resource?
Most water is in the water cycle and cannot be drank
Most water is frozen
Most water is in the atmosphere
Most water is in the oceans and too salty to drink
19
Which of these does NOT explain how mountains can form?
a force from inside Earth which causes an uplift of rocks
a build up of lava on the ocean floor
a force causing rocks to fold on top of each other
sediments deposited by water or wind
20
What is A?
atmosphere
geosphere
biosphere
hydrosphere
21
The rigid outer shell of Earth
atmosphere
geosphere
mantle
crust
22
Scientists believe the deeper into the geosphere _____.
temperature and pressure both increase
temperature increases as pressure decreases
temperature decreases as pressure increases
temperature and pressure both decrease
23
Plates of the lithosphere float on the ____.
asthenosphere
core
lower mantle
crust
24
Alignment of iron minerals in rocks when formed shows Earth's ____ has reversed in the past.
gravity
core
asthenosphere
magnetic field
25
Glaciers are part of Earth’s _____.
outer core
atmosphere
mantle
hydrosphere
26
What is a nebula?
a giant explosion
a sun
a star
a cloud of dust, gas, and ice
27
What does the minus sign in front an elevation signify?
That is in the Southern Hermpishpere
That it is found below sea level
That it is near the equator
It is subtracting the parts below water from above water
28
The water in Earth's oceans, seas, lakes, rivers, and glaciers
hydrosphere
geosphere
atmosphere
biosphere
29
Outermost layer of Earth
lithosphere
mantle
crust
asthenosphere
30
Which layer best represents the inner core ?
3
4
2
1
31
Which of the following would best describe a mountain?
high elevation, low relief
low elevation, high relief
low elevation, low relief
high elevation, high relief
32
Which is the correct formula to find density?
D = m x V
D = m – V
D = m + V
D = m/V
33
What happens to the force of gravity when the distance between two objects decreases?
no attraction
it stays the same
it increases
it decreases
34
Which statement is true?
The solar system was formed from a cloud called biosphere.
The hydrosphere smoothed out the irregular bumps.
Earth was formed prior to the Sun.
The most dense materials collected together form the core.
35
Which is an example of a landform with a low relief and a high elevation?
Atlantic Coastal Plains
Interior Plains
Appalachian Mountains
Ozark Plateau
36
Which is a layer NOT found in Earth’s mantle?
crust
asthenosphere
upper mantle
lithosphere
37
Where on Earth are the longest mountain ranges located?
lower parts of Antarctica
the western United States and Mexico
on the Continental crust
near the centers of the oceans
38
Which term is used to describe the shape of a geographic area?
elevation
landform
relief
topography
39
Why are plains the best landforms for growing crops or grazing animals?
Plains is most abundant. to grow crops and cattle.
Plains have a low elevation, easier to lead animals to them.
Soil found in plains is rich in deposits, plants grow well.
Plains have a high relief so more precipitation is there.
40
The more dense an object _____.
the stronger the gravitational force
the weaker the gravitational force
the less affect it has on the magnetic field
the more round the object
41
Which helped the newly formed Earth become a sphere in shape?
heat
gravity
density
the magnetic field
42
Use the map to answer the question. Which statement below is correct?
Most of Africa is located on top of a plateau.
Given enough time, all plateaus eventually become mountains.
Most common landform found on Earth’s surface are plains.
Mountains are only found near Earth’s equator.
43
Which statement is NOT true about Earth’s magnetic field?
It has reversed directions many times in Earth’s past.
Protects Earth from cosmic rays and particles from the Sun.
It originates in Earth’s core.
Its strength has remained the same throughout history.
44
How is this bar magnet representative of Earth’s magnetic field?
They cure bone stiffness
They have uncharged particles
They both attract metal so astroids hit Earth
They both have have opposite poles
45
Which term is used to explain how high or low a landform is above or below sea level?
slope
feature
elevation
topography
46
Which objects does the force of gravity pull together?
all objects
metal objects
stars
dust
47
All of the following are part of Earth’s biosphere EXCEPT _____.
oak tree
wolves
carbon dioxide
bacteria
48
The blanket of gases that surround Earth
hydrosphere
geosphere
atmosphere
biosphere
49
What is D?
geosphere
biosphere
atmosphere
hydrosphere
50
Differences in ____ cause hot, plasticlike rock in asthenosphere rise toward Earth's surface.
composition
weight
density
magnetism
51
The different layers formed on Earth are due to the differences in _____ of the materials.
the density
the volume
the climate
the mass
52
Which of Earth’s systems makes up all the living organisms found on Earth?
hydrosphere
atmosphere
geosphere
biosphere
53
Many landforms are found both Earth’s surface the ocean floor. Which cannot be found on both?
mountain
canyon
plateau
peninsula
54
What is B?
atmosphere
biosphere
hydrosphere
geosphere
55
How long ago do scientists believe our solar system formed?
4.6 billion years ago
6.4 billion years ago
3.4 billion years ago
5.3 billion years ago
