B. Fill in the blanks: Worksheet
1. Once the magma erupts onto the surface, the magma is called________________
2. The lava converts into ___________once it flat _________ down.
3. The layers of the lava form a _________surface.
4. The most common type of volcano is a ___________________.
5. Sometimes a big crack develop on the earth's _________________.
6. Magma from the mantle travels up the ____________________
7. Once the magma erupts from the surface, the magma is called ____________.
8. The lava can be very ________________.
9. Composite volcano has layers of _______ and _____________.
10. The ash is ______________________lava.
4.1 The structure of Earth
1 Choose the correct alternatives to complete the following sentences.
1.The Earth's crust is thinner / thicker below the oceans than below the land.
2. The outer core of the Earth is solid / liquid.
3. The mantle consists of lava / magma.
3. The inner core of the Earth is solid / liquid.
4. The internal/external structure of the Earth describes what is below the
surface.
5. The core consists of magma / metals.
6. The Earth's crust is the thickest / thinnest layer of the Earth.
7. The temperature decreases / increases as you get closer to the centre of the
Earth.
8. The core / mantle is the thickest layer of the Earth.
9. Magma is a solid / liquid material.
1. Fill in the missing words. Choose words from this list:
Hot
cone
Composite
ash
composite
lava
crust
Hawaii
black
mantle
When a volcano ________________magma from the ____________ comes
to the surface through a crack in the _______________. When magma reaches
the surface it is called _____________________. Sometimes __________ and __________
come out of the volcano. These materials build up to form a _________________
shaped mountain called a ______________volcano.
When the lava is very runny it moves quickly over the surface.
The islands of __________________were formed like this. The lava cools to form
________________ rocks.
3. Complete these sentences, which explain how earthquakes happen. Use
these words:
Waves
crust
movement
energy
An earthquake happens when there is a sudden ______________Earth's crust. This
creates huge amounts of ____________________. The energy transfers into _________.
The waves travel through the Earth's ____________ to the structure.