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Seafloor Spreading Homework-Quizizz

Total questions: 35

Worksheet time: 32mins

Name
Class
Date
1.
In the Atlantic ocean, where is the youngest seafloor located?
a)
Towards the edges, near the eastern and western continents
b)
Towards the middle of the ocean
c)
Towards the north and south poles
d)
Young seafloor is located randomly throughout the ocean
2.
How do scientists figure out the age of the seafloor?
a)
They research it from ancient sea maps that trading vessels would use in the 1700s
b)
They use the moon phases and eclipses to calculate the age
c)
They use seismographs and the depth as well as location of earthquakes to calculate the age
d)
They take drill ships to many locations in the oceans and collect, then date, rock samples. 
3.
True or False: The Mid-Atlantic ridge in the Atlantic ocean is the ONLY example of a divergent boundary (<---->)
a)
True
b)
False
4.
True or False: The continents on the eastern (the Americas) and western (Europe, Africa) side of the Atlantic Ocean are moving closer together. 
a)
True
b)
False
5.
True or False: The Pacific Ocean is shrinking
a)
True
b)
False
6.
What is FALSE about the age pattern on the seafloor in the Atlantic Ocean? 
a)
The pattern is symmetrical on each side of the Mid-Atlantic ridge (plate tectonic boundary)
b)
The oldest seafloor can be found towards the edges of the ocean, near the eastern and western continents
c)
The youngest sea floor can be found towards the edges of the ocean, near the eastern and western continents
d)
Seafloor near the Mid-Atlantic ridge (plate tectonic boundary) can be up to 10 million years old
7.
What two words are BEST used to describe how the seafloor spreads?
a)
Magma and convection
b)
Earthquakes and convection
c)
Magma and convention
d)
Volcanoes and earthquakes
8.

True or False: It is likely that our continents will eventually become a supercontinent (like Pangaea) again, far in the future

a)
True
b)
False
9.
What is the rate at which the Atlantic Ocean is expanding? 
a)
Between 5-10 mm per year
b)
Between 5-10 cm per year
c)
Between 5-10 km per year
d)
Between 5-10 inches per year
10.

What were 2 kinds of evidence were used to prove that the seafloor spread?

a)

rock formations, WWII shipwrecks

b)

magnetic seafloor stripes, WWII ship logs

c)

magnetic seafloor stripes, age of rocks

11.
What technology was used during WWII to detect enemy submarines and produce the first map of the seafloor?
a)
Sonar
b)
Radar
c)
GPS
12.

Process by which new ocean crust forms.

a)

Seafloor spreading

b)

Continental drift

c)

Mid-ocean ridge

d)

Rift

13.
The zone where one plate slides under another is called the
a)
Convergent zone
b)
Subduction zone
c)
Transform zone
d)
Mantle zone
14.
Undersea mountain range.
a)
Rift
b)
Mid-ocean ridge
c)
seafloor spreading
d)
Continental drift
15.
The OLDEST seafloor is located? 
a)
Closest to the mid-ocean ridge
b)
Farthest from the mid-ocean ridge
16.
What are Mid-Ocean Ridges?
a)
A chain of underwater waterfalls 
b)
A chain of underwater volcanos
c)
A chain of underwater mountains
d)
A chain of underwater rocks
17.

Sea-floor spreading begins at the

a)

Deep ocean trench

b)

Mid-ocean ridge

c)

Continent's edge

18.

Older crust is found towards the...(select two answers)

a)
Mid-ocean ridge
b)
Deep-ocean trench
c)
Asthenosphere
d)

Edge of the continents

19.

Why does oceanic crust sink below the continental crust during subduction

a)

oceanic crust is less dense

b)

oceanic crust is more dense

c)

oceanic crust is older

d)

oceanic crust is warmer

20.

In the Atlantic ocean, where is the youngest seafloor located?

a)

Towards the edges, near the eastern and western continents

b)

Towards the middle of the ocean at ocean ridges

c)

Towards the north and south poles

d)

Young seafloor is located randomly throughout the ocean

21.
What is FALSE about the age pattern on the seafloor in the Atlantic Ocean? 
a)
The pattern is symmetrical on each side of the Mid-Atlantic ridge (plate tectonic boundary)
b)
The oldest seafloor can be found towards the edges of the ocean, near the eastern and western continents
c)
The youngest sea floor can be found towards the edges of the ocean, near the eastern and western continents
d)
Seafloor near the Mid-Atlantic ridge (plate tectonic boundary) can be up to 10 million years old
22.

In sea-floor spreading, molten material rises from the mantle and erupts

a)

in deep-ocean trenches

b)

along the edges of all the continents

c)

along mid-ocean ridges

d)

at the north and south plate

23.

The process by which the ocean floor sinks beneath an deep-ocean trench and back into the mantle is known as

a)

continental drift

b)

subduction

c)

conduction

d)

convection

24.

The process of ___________ continually adds new crust to the ocean floor along both sides of the mid-ocean ridge.

a)

plate tectonics

b)

seafloor spreading

c)

continental drift

d)

convection

25.

What kind of plate boundary is shown on the picture?

a)

divergent

b)

convergent

c)

transform

d)

trench

26.

The scientist credited with sea-floor spreading is _________

a)

Alfred Wegener, a German scientist

b)

Harry Hess, an American geologist

c)

J.Tuzo Wilson, a Canadian scientist

d)

Kenn Bulaso, a Filipino educator

27.

What is formed at the subduction zone?

a)

mountain ranges

b)

deep-sea trenches

c)

oceanic ridge

d)

hills and valleys

28.
Which of the following supports the theory of seafloor spreading?
a)
Correlation of rock layers
b)
Crustal Age
c)
Magnetic Reversal
d)
Continuous Mountain Chains
29.
When looking at mid ocean ridges the oldest rocks are 
a)
In the middle
b)
Found close to the rift zone
c)
Found far from the mid ocean ridges
30.

What 3 kinds of evidence were used to prove that the seafloor spread?

a)

Rock formations, age of rocks, WWII shipwrecks

b)

Age of rocks, magnetic seafloor stripes, WWII ship logs

c)

Rock formations, magnetic seafloor stripes, age of rocks

31.
What technology was used during WWII to detect enemy submarines and produce the first map of the seafloor?
a)
Sonar
b)
Radar
c)
GPS
32.

Process by which new ocean crust forms.

a)

Seafloor spreading

b)

Continental drift

c)

Mid-ocean ridge

d)

Rift

33.
Why were magnetic patterns found on the ocean floor puzzling?
a)
They showed alternating bands of normal and reversed polarity.
b)
No rocks were magnetic.
c)
They did not show alternating bands of normal and reversed polarity.
d)
All rocks were magnetic.
34.
What are Mid-Ocean Ridges?
a)
A chain of underwater waterfalls 
b)
A chain of underwater volcanos
c)
A chain of underwater mountains
d)
A chain of underwater rocks
35.

What evidence helps scientists show how sea floor spreading occurs?

a)

Ocean Floor Material

b)

Magnetic Stripes

c)

The age of the ocean floor

d)

All of the Above

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