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Questions and Answers
The Earth's crust is about 40 km thick.
The Earth's crust is about 40 km thick.
True
The mantle is solid towards the crust and molten deeper down.
The mantle is solid towards the crust and molten deeper down.
True
The outer core is a layer of solid rock.
The outer core is a layer of solid rock.
False
The inner core of the Earth is believed to be made mostly of iron.
The inner core of the Earth is believed to be made mostly of iron.
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Earth's surface is made up of stationary plates.
Earth's surface is made up of stationary plates.
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Earthquakes occur when two plates of the Earth's surface move suddenly against each other.
Earthquakes occur when two plates of the Earth's surface move suddenly against each other.
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Volcanoes erupt when the Earth's crust shifts or cracks, causing molten rock to rise up.
Volcanoes erupt when the Earth's crust shifts or cracks, causing molten rock to rise up.
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Erosion is the process of adding rocks and soils to the surface of the Earth.
Erosion is the process of adding rocks and soils to the surface of the Earth.
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Rocks and stones knocking against each other along rivers and streams cause erosion.
Rocks and stones knocking against each other along rivers and streams cause erosion.
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Ash and volcanic cones are results of earthquakes.
Ash and volcanic cones are results of earthquakes.
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