Fastest flowing, made up of iron and magnesium, expelled from shield volcanoes
Flows at a slower rate, originates from stratovolcanoes, block flow
7. Which best describes convection currents?
Unstable temperatures generated by radioactive decay in core, move plates, diverge near crust pulls plates apart, converge moves plates together.
Stable temperatures generated by earthquakes, diverge near crust to move plates together, converge to pull plates apart.
Unstable temperatures generated by radioactive decay, constantly hot inside mantle, pull plates apart where it converges.
8. How are earthquakes measured?
On a Richter scale, 0-10
On a Richter scale, 1-10
On a seismograph, 0-10
On a seismograph, 1-10
9. What is pyroclastic flow?
A mixture of nickel, iron, aluminium and granite.
A mixture of hot steam, ash, rock and dust.
A mixture of water, stone, magma and metal
10. Preparing and predicting earthquakes?
Detect radon gas, seismometer, laser beams, drills, training, construction of sturdy buildings
Exclusion zone, evacuations, communications, sulphur gas testing, rising temperatures
11. What is the outer core made out of?
A solid layer made up of iron and nickel. Is extremely hot but not the hottest.
A solid layer made up of iron and nickel. Is the hottest layer.
A liquid layer made up of iron and nickel. Is extremely hot but not the hottest.
A liquid layer made up of iron and nickel. Is the hottest layer.
12. What do volcanic eruptions cause?
Ash, smoke, lava, magma,
Flooding, rain, clouds, rainbows
13. Environmental impacts of earthquakes?
Fire damage, landslides, tsunamis, landmarks lost.
Business destroyed, damage to transport and communication, income lost.
14. Preparing and predicting volcanoes?
Exclusion zone, evacuations, communications, sulphur gas testing, rising temperatures
Detect radon gas, seismometer, laser beams, drills, training, construction of sturdy buildings
15. Define subduction.
When the plate goes against another plate.
When the inner core begins to turn into the outer core.
When the plate goes under another plate.
When the plate causes convection currents.
16. Social impacts of earthquakes?
Death, injury, burst water pipes, disease spread, re-housing
Injury, decline in animal species, cost of building settlement.
17. Explain what happens at a destructive plate boundary.
1 The continental plate denser than oceanic plate 2 moving together, the continental plate forced underneath oceanic; called subduction 3 Continental plate melts to form magma, earthquakes are triggered 4 magma rises through cracks, eruption occurs
1 The oceanic plate denser than continental plate 2 moving together, the oceanic plate forced underneath continental; called subduction 3 Oceanic plate melts to form magma, earthquakes are triggered 4 magma rises through cracks, eruption occurs
1 The oceanic plate denser than continental plate 2 moving together, the oceanic plate forced underneath continental; called redduction 3 Oceanic plate melts to form magma, no earthquakes are triggered 4 magma rises through cracks, no eruption occurs
18. What is andesitic lava?
Flows at a slower rate, originates from stratovolcanoes, block flow
Fastest flowing, made up of iron and magnesium, expelled from shield volcanoes
19. How are earthquakes measured?
On an instrument called a Richter scale using the seismicmeter.
On an instrument called the Richter scale using a seismometer.
On an instrument called a seismometer using the Richter scale.
On an instrument called a seismicmeter using the Richter scale.
20. Continental crust is...
A type of crust that carries water and land. It is not very dense.
A type of crust that carries land. It is the denser crust.
A type of crust that carries land. It is the less dense crust.
A type of crust that carries water. It is the denser crust.
