What are the three main layers of the Earth?

• Lithosphere, Atmosphere, Hydrosphere

• Core, Mantle, Lithosphere

• Crust, Mantle, Atmosphere

• Crust, Mantle, Core

What is the outermost layer of the Earth called?

• Lithosphere

• Core

• Mantle

• Crust

What is the layer beneath the Earth's crust?

• atmosphere

• mantle

• lithosphere

• core

What is the innermost layer of the Earth?

• Crust

• Inner core

• Outer core

• Mantle

What is the mantle primarily made of?

• Silicate minerals, primarily olivine and pyroxenes.

• Granite and basalt

• Water and ice

• Iron and nickel

How thick is the Earth's crust on average?

• 15 kilometers

• 20 kilometers

• 30 kilometers

• 50 kilometers

What is the core of the Earth mainly composed of?

• Iron and nickel

• Aluminum and magnesium

• Calcium and sulfur

• Silicon and oxygen

What is the difference between the inner core and outer core?

• The inner core is gas; the outer core is solid.

• Both the inner core and outer core are solid.

• The inner core is liquid; the outer core is solid.

• The inner core is solid; the outer core is liquid.

What layer do tectonic plates float on?

• asthenosphere

• lithosphere

• mantle

• core

Why is the study of Earth's layers important?

• It helps in identifying different species of plants.

• The study is crucial for improving agricultural practices.

• Understanding Earth's layers is essential for space exploration.

• The study of Earth's layers is important for understanding geological processes and predicting natural disasters.