WorksheetsVolcanoes
Total questions: 8
Worksheet time: 5mins
Why is there heat in the Core?
Because there are volcanoes.
Because there are magma chambers.
Because we are close to the Sun orbit.
Because it was left when the planet was formed.
If the magma is less dense than the rock from which it melted. It should go ..... Remember convection currents
up
down
The density of magma depends on its (a) , the amount of dissolved gas and its temperature.
Magma can keep afloat on liquid and gas. (buoyant)
No
Yes
Where can volcanoes occur? Choose 3
Around divergent plate boundaries.
Around convergent plate boundaries.
Around transform plate boundaries.
Hot spots
All of the above
The type of the eruption is determined by the composition of the magma.
No
Yes
Which of the following components can cause a violent eruption?
Lava with more iron and magnesium, less silica.
Lava with silica (silicon and oxygen).
What builds up pressure in the magma? (a)
