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7th Grade Earth Structure Test Flashcards | StudBud
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7th Grade Earth Structure Test
7th Grade Earth Structure Test
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1
Modern humans have existed for 1 million years.
False
True
2
Describe the structure of the earth's inner core.
Fluid magma
Fluid iron and nickel
Solid silicon
Solid iron
3
The theory about the movement of tectonic plates over time is called...
Pangea
Tectonic Transformation
Continental Drift
Convergent Boundaries
4
What occurs at a divergent plate boundary?
Plates collide
Plates slide
Plates divide
5
Which event occurred earliest in Geologic Time?
Oxygen appears in the earth's atmosphere
Dinosaurs arrive
Modern Humans Arrive
The earliest lifeforms arrive
6
Where do convection currents occur?
Crust
Outer Core
Asthenosphere
Lithosphere
7
FAST CHANGES occur at transform boundaries.
False
True
8
What forms when two pieces of oceanic crust collide?
Island Arc Volcanoes
Mountain Ranges
Basins
Ridges
9
The crust is "rigid".
False
True
10
Continental crust is DENSER than oceanic crust.
False
True
11
Modern humans are relatively "new" in terms of Geologic Time.
False
True
12
Why are cyanobacteria important to human existence?
They were a source of food for early humans.
They provide essential nutrients to our diets.
They infected predators of humans.
They made the atmosphere oxygen-rich.
13
Which of the following is not considered a compositional layer of the earth?
Mantle
Crust
Inner Core
Asthenosphere
14
Pressure decreases as depth into the Earth's center increases.
False
True
15
Why are fossils important?
They give us clues about geologic events.
All of the options!
They can tell us what the ecosystem was like in the past.
They fill in missing gaps of knowledge about the history of life on Earth.
16
The supercontinent that started breaking up 300 m.y.a. is called...
Eusthenopteron
Gaia
Archaen
Pangea
17
What happens at a transform plate boundary?
Plates collide
Plates divide
Plates slide past one another
18
The first life forms on earth were...
Multicellular
Single-celled
19
What happens at a convergent plate boundary?
Plates collide
Plates slide past each other
Plates divide
20
What landforms are created when two continental plates collide?
Trenches
Mountains
Island Arc Volcanoes
Rift Valleys
21
Which event occurred earliest in Geologic Time?
Modern humans arrive
The last Ice Age
Dinosaurs appear
The last major extinction (meteorite)
22
What piece of evidence was not used by Wegener to support his theory?
Fossils
Radioactive Dating
Climate
Landforms
23
In which mechanical layer of earth do the plates exist?
Inner core
Lithosphere
Mesosphere
Asthenosphere
24
The Great Lakes were formed by glaciers BEFORE modern humans arrived.
True
False
25
Continental crust is THICKER than oceanic crust.
True
False
26
What also increases as depth increases towards the Earth's center?
Temperature
Pressure
All options are correct!
Density
27
What happens during subduction?
An oceanic plate falls under a continental plate
A continental plate slides past an oceanic plate
A continental plate falls under another continental plate
A continental plate falls under an oceanic plate
