Interior of Earth

Mining activity is what type of source of information about the Earth?

• Direct

• Indirect

• None

• Both

which one is an Indirect source of the Earth's information?

• Volcanoes

• Drilling

• Meteorites

• None

SIAL is

• Silica and Aluminum

• Upper layer of the earth's Crust

• Both of the above

• Lower earth crust

SIMA is

SIAL is heavier as compared to SIMA, state whether true or false?

The depth of the crust is roughly ....... km

• 40 to 50

• 10 to 50

• 70 to 100

• 30 to 50

Mantle is ------- km deep

• 2000

• 2900

• 2700

• 2300

Core is .... km deep

• 6300

• 6700

• 6200

• 6800