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Intro to Earth Science Flashcards | StudBud
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Intro to Earth Science
Intro to Earth Science
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year 9 earth science
Flashcards
14 cards
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Practice quiz
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Questions
14
Answers
1
How many years ago was Earth created?
1.6 billion years
4.6 million years
4.6 billion years
5.6 billion years
2
The outer surface of Earth is called the ____
skin
crust
external layer
edge
3
The Earth's
outer core
is a
liquid layer
made up of mostly ____
iron and sulphur
iron and nickel
nickel and carbon
iron and oxygen
4
Inside the Earth hot rock moves about breaking the Earth's crust from below. This process is
Magma
Plate tectonics
Plate formation
Earth's crust
5
From the Earth's crust to the inner core the temperature ____
fluctuates
decreases
increases
remains the same
6
The ozone layer is in the ____
mesosphere
stratosphere
troposphere
thermosphere
7
Earth's age is approximately ____ of the age of the Universe.
one half
one quarter
one sixth
one third
8
When the plates on Earth meet they create____
mountains and oceans
a big mess
boulders and stones
mountains or deep trenches
9
The
mantle
is approximately ____ thick.
5900km
290km
2900km
290000km
10
The thickness of the
crust
can vary between ____
10-100km
0-75km
5-70km
0-100km
11
The surface of Earth is approximately ____
70% water and 30% land
50% water and 50% land
80% water and 20% land
60% water and 40% land
12
Material from Earth was smashed out into orbit and formed _____
the moon
a star
the sun
an asteroid
13
The
inner core is
mostly solid ball and is made up of a/an ____ alloy
iron nickel
nickel magnesium
copper nickel
iron lithium
14
The
lithosphere
and
asthenosphere
make up the ____
lower mantle
crust
core
upper mantle
