WorksheetsContinental Drift and Seafloor Spreading
Total questions: 19
Worksheet time: 10mins
Wegener's idea of Continental Drift was rejected by geologists because _________.
He used too many pieces of evidence to support the idea.
It is impossible to predict what Earth looked like millions of years ago.
He couldn't explain HOW or WHY the continents moved.
They were afraid of the new idea.
Underwater mountain ranges are called ____________.
deep sea trenches
mid-ocean ridges
seafloor spreading
continental drift
The OLDEST rocks on the seafloor are located?
Closest to the mid-ocean ridge
Farthest from the mid-ocean ridge
The YOUNGEST rocks on the seafloor are located?
Closest to the mid-ocean ridge
Farthest from the mid-ocean ridge
What theory states that the continents were once part of a super continent called Pangaea and have moved slowly to their current locations over hundreds of millions of years.
Oceanic wandering
Land-form Evidence
Continental Drift
Fossil Distribution
What types of evidence did Wegener use to support the theory of Continental Drift? (Select ALL answer that are correct)
evidence from land features
evidence from animal fossils
evidence from ancient climates
evidence from plant fossils
evidence from human remains
Who suggested the theory of seafloor spreading?
Harry Hess
Alfred Wegener
Albert Einstein
Mrs. Moskowitz
According to Wegener, the continents used to be joined together as one supercontinent known as:
South Africa
Eurasia
Gonwandaland
Pangaea
How long did it take the continents to move from Pangaea into their current position?
Hundreds of years
Thousands of years
Millions of years
Who is the person credited with developing the theory of continental drift?
Harry Hess
Mrs. Moskowitz
Albert Einstein
Alfred Wegener
What is this a picture of?
Eurasia
Pangaea
Laurasia
Gonwandaland
The youngest seafloor crust is located...
Farthest from the mid-ocean ridges
Closest to the mid ocean ridges
Nearest the continents
On the land
The process of new seafloor forming when magma rises at the mid-ocean ridges and solidifies, pushing older rock away is called _____.
Seafloor Spreading
Continental Drift
Select all the TRUE statements about seafloor spreading
The oldest rocks are located closest to the mid-ocean ridges.
Seafloor spreading explains how mid-ocean ridges are formed.
Seafloor spreading explains how the continents moved apart.
New seafloor is formed at mid-ocean ridges.
What are TWO pieces of evidence for Seafloor Spreading
Youngest rocks are located closest to mid-ocean ridges
Similar animal fossils are found on continents separated by oceans.
It is very hot in the United States in the summer.
Older rocks are further away from mid-ocean ridges
At the Mid-Ocean Ridges you can find:
deep sea trenches
the oldest crust
the newest crust
The image shows a diagram of the ocean floor near a mid-ocean ridge. Where would the oldest rock be found?
L
M
N
O
True or false: The tectonic plates will never stop moving
True
False
Convection currents in the _________ pull the seafloor apart.
crust
mantle
core
