WorksheetsOcean Floor Tectonic Plates
Total questions: 20
Worksheet time: 25mins
Name
Class
Date
1.
Fossils of a dinosaur have been found in both southern Africa and South America but nowhere else. What does this mean?
a)
The fossils evolved into different organisms.
b)
The climate changed and became much colder.
c)
In the past, Africa and South America were part of the same continent.
d)
In the future, Africa and South America will be part of the same continent.
2.
Sea-floor spreading states that new ocean crust is being formed constantly. Which of the following is also true?
a)
The oceans are constantly getting bigger.
b)
The amount of land on earth is constantly increasing.
c)
The amount of land on earth remains the same due to subduction.
d)
When the size of the crust reaches a certain amount, sea-floor spreading will stop.
3.
Which of the following objects best represents the movement that occurs during sea-floor spreading?
a)
Elevator
b)
Conveyor belt
c)
Rollercoaster
d)
Hot air balloon
4.
Climate change over time is evidence to support the theory of continental drift. Which example below supports this evidence?
a)
Pangaea broke apart causing an ice age.
b)
Antarctica drifted farther from the equator causing its climate to cool.
c)
North America drifted farther from the equator causing its climate to heat up.
d)
Over time the equator gradually became warmer and the poles became colder.
5.
What process is occurring at Z?
a)
Convection currents
b)
Subduction
c)
Two plates moving apart
d)
New ocean floor forming
6.
Why does the ocean floor sink beneath the continent at Z?
a)
The ocean floor is less dense than the continent.
b)
The ocean floor is more dense than the continent.
c)
The ocean floor is moving faster than the continent.
d)
The ocean floor is moving slower than the continent.
7.
How do Mid-Ocean Ridges support both the idea of continental drift and the theory of plate tectonics?
a)
Oceanic lithosphere is destroyed at mid-ocean ridges.
b)
New crust forms at mid-ocean ridges.
c)
Tectonic plates collide at mid-ocean ridges.
d)
The crust at mid-ocean ridges is old oceanic lithosphere.
8.
Compare the process that occurs at a mid-ocean ridge to the process that occurs at a deep ocean trench?
a)
Older rock is formed at the mid-ocean ridge and newer rock is subducted at a deep ocean trench.
b)
New rock is being created at a mid-ocean ridge and old rock is being subducted at a deep ocean trench.
c)
Old rock returns to the mantle at the mid-ocean ridge and volcanoes are created at a deep ocean trench.
d)
Rocks move towards each other at a mid-ocean ridge and move away from each other at a deep ocean trench
9.
Which piece of evidence did Wegener NOT use to support his theory of continental drift?
a)
Climate
b)
Sea-floor spreading
c)
Continents’ shape
d)
Plant and animal fossils
10.
What is the name for the process where new ocean floor is constantly being created AND recycled?
a)
Plate Tectonics
b)
Subduction
c)
Convection currents
d)
Sea floor spreading
11.
What is the name for the process where new ocean floor is constantly being created AND recycled?
a)
Plate Tectonics
b)
Subduction
c)
Convection currents
d)
Sea floor spreading
12.
Which of the following did Alfred Wegener propose?
a)
There is a mid-ocean ridge creating new ocean floor.
b)
Sea-floor spreading is causing the continents to drift.
c)
Convection currents are causing our continents to drift.
d)
All continents were once joined together as one and have since drifted apart.
13.
What do convergent (oceanic and continental) form?
a)
Volcanoes, subduction, and trenches
b)
Mountains
c)
MOR
d)
Rift Valley
14.
What is Pangaea?
a)
an icy sheet which covered many continents
b)
fossil of a fern found on many continents
c)
a mountain belt connecting many continents
d)
a super continent that contained all the continents
15.
Why were some scientists skeptical about the theory of continental drift?
a)
they found evidence of colder climates in areas that are warm today
b)
they did not know what caused similar rock formations on different continents
c)
they did not know what forces caused the continents to move
d)
they found fossils of several organisms on different continents
16.
What type of plate is thicker?
a)
continental
b)
oceanic
17.
What is it called when two oceanic plates move apart and new crust is formed?
a)
crustal integrating
b)
sea-floor spreading
18.
A hypothesis that originally proposed that the continents had once been joined to form a single supercontinent
a)
Pangaea
b)
Subduction
c)
Continental Drift
d)
Sea Floor Spreading
19.
In the mantle provide the basic driving forces for plate motion.
a)
Slab-Pull
b)
Divergent Current
c)
Convection Current
d)
Ridge-push
20.
A long Chain of mountains extending the length of the ocean ?
a)
Mid-Ocean Ridge
b)
Pangaea
c)
Rift Valley
d)
Deep Ocean trench
100 %
![FINAL EXAMS | [HARD] Grammar Practice Quiz](https://cf.quizizz.com/image/image-loader.svg)
