8th SSA Review-Earth Structure-SC.7.E.6.1

What is the outermost solid layer of the Earth called?

• Mantle

• Core

• Lithosphere

• Asthenosphere

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What are the two parts that make up the Earth's core?

• Liquid outer core and solid inner core

• Solid outer core and liquid inner core

• Hot mantle and cool crust

• Lithosphere and asthenosphere

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Which layer of the Earth is described as hot and convecting?

• Lithosphere

• Inner core

• Outer core

• Mantle

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What metals are primarily found in the Earth's dense core?

• Aluminum and silicon

• Iron and nickel

• Copper and zinc

• Gold and silver

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Which of the following correctly lists the layers of the solid Earth from the outermost to the innermost?

• Core, mantle, lithosphere

• Mantle, lithosphere, core

• Lithosphere, mantle, core

• Core, lithosphere, mantle

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Why is the Earth's mantle described as "convecting"?

• Because it is made entirely of solid rock that never moves

• Because heat causes material in the mantle to rise, cool, and sink in a circular pattern

• Because it reflects heat from the Sun back into space

• Because it conducts electricity from the core to the surface

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Why is the outer core liquid while the inner core is solid, even though the inner core is hotter?

• The inner core is made of different materials that melt at lower temperatures

• The extreme pressure at the inner core forces the material to remain solid despite the higher temperature

• The outer core receives more heat from the mantle, causing it to melt

• The inner core is cooler because it is farther from the mantle

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Which property best distinguishes the lithosphere from the mantle directly beneath it?

• The lithosphere is denser than the mantle

• The lithosphere is rigid and solid, while the upper mantle below it is more plastic and can flow slowly

• The lithosphere is hotter than the mantle

• The lithosphere contains more metallic elements than the mantle

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How does the composition of the Earth's core differ from that of the lithosphere?

• The core is made mostly of silicate rocks, while the lithosphere is made of iron and nickel

• The core is made mostly of dense metallic iron and nickel, while the lithosphere is made of lighter silicate rocks

• Both the core and lithosphere are made of the same materials but at different temperatures

• The core is made of gases, while the lithosphere is made of solid metals

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Which of the following correctly describes the relationship between depth and temperature within the Earth's layers?

• Temperature decreases as depth increases

• Temperature remains constant at all depths

• Temperature increases as depth increases

• Temperature increases only in the lithosphere and decreases in all other layers

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