Plate tectonics
1 . Complete the sentences below.
crypt
liquid
fragile
solid
mantle
coat
crust
fringe
inner core
The
is found at the centre of the Earth. This is the hottest part of the
Earth. It is
and made up of iron and nickel. The outer core surrounds
the centre. It is also made of iron and nickel, but it is
. It is very hot, but
not as hot as the centre. The widest section of the Earth is called the
.
It is made up of semi-molten rock called magma. Near the centre this layer is
softer and towards the outside it is harder. The outer layer of the Earth is called
the
. It is a thin layer of solid rock.
2 . Complete the sentences below.
Metamorphic
Precious
magma
Igneous
marble
Ingenious
Sedimentary
detritus
rocks are formed when
from inside the Earth erupts to the
surface, cools down and solidifies to form rock. These include basalt and granite.
rocks are formed by the remains of living things or from the fragments
of other rocks. These include sandstone, chalk and limestone.
rocks
are formed when intense heat and pressure changes rocks. These are harder
and smaller than the original rocks and include
quartzite.
, sandstone, and
3 . What causes earthquakes and volcanic eruptions?
a)
Gravity
b)
Plate tectonics
c)
Magma
d)
Global warming
4 . A constructive or divergent plate boundary is when
a)
Plates move together
b)
Plates move apart
c)
Plates slide past each other causing friction
5 . A destructive or convergent boundary is when
a)
Plates move together
b)
Plates move apart
c)
Where plates slide past each other
Tectonic plate boundaries
1 . Complete the sentences below
Volcanoes
earthquakes
conservative
constructive
At a
plate boundary, two of the earth's plates are sliding horizontally
past each other. No land is created at a conservative boundary and none is
destroyed.
common.
do not occur along these boundaries, but
are very
2 . Which of these statements about a constructive boundary is NOT true?
a)
Constructive boundaries are more commonly found on land than under the
sea.
b)
The earth's plates are moving apart due to convection currents inside the
Earth.
c)
d)
e)
As the plates move apart (very slowly) magma rises from the mantle.
When the magma reaches the surface, it cools and solidifies to form a new
crust of igneous rock.
Volcanoes often form at constructive boundaries.
3 . The Himalayas were formed on what kind of plate boundary?
a)
Labour
b)
Constructive
c)
Liberal
d)
Destructive
e)
Conservative
4 . The Mid-Atlantic Ridge or chain of volcanoes formed underneath the Atlantic
Ocean is created by what kind of plate boundary?
a)
Labour
b)
Constructive
c)
Liberal
d)
Destructive
e)
Conservative
5 . The San Andreas Fault is an example of what kind of plate boundary?
a)
Labour
b)
Constructive
c)
Liberal
d)
Destructive
e)
Conservative