A volcano is said to be extinct if it:

has shown no signs of erupting for thousands of years.

What is a dormant volcano?

Hasn't erupted in a long time but could potentially erupt again.

Which of the following statements is correct?

Many volcanoes are found at the boundaries of tectonic plates.

The folding process is caused by:

the bending of rock as a result of forces beneath the surface

Select the true statement from the following.

Continental crust is thicker than oceanic crust.

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Earth science revision Year 9

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Questions 15

Answers

1
Synclines and anticlines are examples of:
Horsts
Folds
Faults
Ocean ridges
2
A subduction zone is formed when:
an oceanic plate slides under a continental plate
all of the above
two plates move apart from each other
wo plates slide past each other
3
Which of the following events do not take place in the Earth’s crust?
Convection currents
Earthquakes
Folding
Faulting
4
225 million years ago, all continents were joined to form a super continent called:
Gondwana
Tethys
Laurasia
Pangaea
5
A volcano is said to be extinct if it:
is erupting or may erupt at any time.
has shown no signs of erupting for thousands of years.
has shown no sign of erupting for at least ten years.
Is not active, but may erupt again in the future.
6
What is a dormant volcano?
Is actively monitored and predicted to erupt soon.
Hasn't erupted in a long time but could potentially erupt again.
Is currently erupting.
Has never erupted before.
7
Which of the following statements is correct?
Few volcanoes are found at the boundaries of tectonic plates.
All volcanoes are found at the boundaries of tectonic plates.
Many volcanoes are found at the boundaries of tectonic plates.
No volcanoes are found at the boundaries of tectonic plates.
8
Which of the following features of the Earth have been caused by folding?
The Grand Canyon
Yorke Peninsula, South Australia
the himalayas
The San Andreas Fault
9
Which of the following layers of the Earth is solid and composed mostly of iron?
mantel
Crust
Inner core
Outer core
10
The folding process is caused by:
a crack in rocks due to the forces beneath the surface.
the bending of rock as a result of forces beneath the surface
the action of volcanoes and earthquakes.
the slipping of blocks of crust past each other.
11
Which of the following can be explained by the theory of plate tectonics?
The growth of the Himalayas
All of the above
The San Andreas fault
The slow movement of the continents
12
Select the true statement from the following.
Continental crust is denser than oceanic crust.
Continental crust is thicker than oceanic crust.
Sliding plates occur along the west coast of South America.
Subduction zones occur where two plates of continental crust collide.
13
Which impact of volcanic eruptions causes problems for society?
Pollution of the atmosphere
Tsunamis
Cyclones
Red sun sets
14
Which mountains in Queensland are examples of extinct volcanoes?
Glasshouse Mountains
Lord Howe Island
Surtsey
Tower Hill
15
An earthquake has occurred and two points are labelled in the diagram. Identify the points X and Y.
X- dead centre, Y- focus
X- focus, Y- dead centre
X- focus, Y- epicentre
X- epicentre, Y- focus

Earth science revision Year 9 Flashcards | StudBud