Earthquakes and Volcanoes 1
Iron (as found in this rusty gate above) makes up the majority of the earth's core.

Earthquakes and Volcanoes 1

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Earthquakes are measured on the Richter scale. Earthquakes involve a sudden release of energy in the Earth's crust whilst a volcano means an opening or rupture in the crust.

See how much you know about these natural phenomena in the first of three quizzes on earthquakes and volcanoes.

1.
What type of volcano has not erupted for many years but could still do so?
Dormant
Extinct
Snoozing
Somnolent
The name dormant suggests that it's 'sleeping'!
2.
The earth's crust is made up of separate pieces called what?
Plates
Platters
Saucers
Slabs
3.
What is the name of the earth's thin surface layer?
Crust
Mantle
Shell
Veneer
Although 'thin' it can be between approx. 5-60+ kms thick
4.
What is the name for the main opening in a volcano?
Chimney
Downpipe
Vein
Vent
5.
Molten rock inside the earth has what name?
Lava
Magenta
Magma
Silica
It's called lava once it appears at the surface
6.
Which of these areas is unlikely to suffer an earthquake?
California
Japan
New Zealand
Scandinavia
It isn't in an unstable part of the Earth's crust
7.
The earth is made up of how many layers?
2
3
4
6
These are the inner core, the outer core, the mantle and the crust
8.
The earth's core is mainly made up of which metal?
Copper
Iron
Magnesium
Zinc
Approximately 90% iron, 10% nickel
9.
Why doesn't the UK have any active volcanoes?
It doesn't have high enough mountains
It doesn't lie on a plate boundary
It is surrounded by sea
The earth underneath isn't hot enough
10.
What instrument is used to measure an earthquake?
Anemometer
Galvanometer
Seismometer
Shakeometer
Author:  Jan Crompton

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