QUIZ1

What is the shape of the Earth?

• Sphere

• Oblate Spheroid

• Cube

• Cylinder

What is the diameter of the Earth along the equator?

• 12,500 km

• 12,740 km

• 13,000 km

• 12,700 km

What causes the higher diameter of the Earth along the equator?

• Gravitational forces

• Centrifugal forces

• Tectonic activity

• Magnetic forces

What is the thickness of the continental crust?

• 40 km

• 5 km

• 50 km

• 30 km

What type of rocks primarily compose the oceanic crust?

• Sedimentary rocks

• Basaltic rocks

• Metamorphic rocks

• Granitic rocks

What is the depth of the upper mantle?

• 400 km

• 1000 km

• 1500 km

• 2900 km

What is the primary composition of the inner core?

• Basalt

• Solid iron and nickel

• Silicate minerals

• Molten iron

What is the specific gravity of the Earth's mantle?

• 3.5

• 9-12

• 5

• 2.8

What is the average specific gravity of the Earth?

• 3.0

• 4.0

• 5.5

• 2.8

What is the temperature of the inner core approximately?

• 5000°C

• 2000°C

• 3000°C

• 1000°C