Trembling Earth

Question 1

Describe the internal structure of the Earth.

Answer 1

Question 2

What is the asthenosphere?

Answer 2

• the upper layer of the earth’s mantle, below the lithosphere.
• liquid part of the mantle

Question 3

What is the lithosphere?

Answer 3

• the solid rock of the crust
• crust and upper mantle

Question 4

What is the hydrosphere?

Answer 4

• all the waters on the earth’s surface such as
  
  • lakes
  • seas
  • clouds.

Question 5

What is the biosphere?

Answer 5

• the regions of the earth occupied by living organisms.

Question 6

What is the atmosphere?

Answer 6

• the envelope of gases surrounding the earth.
• gases above the crust

Question 7

What causes continental drift?

Answer 7

• Convection currents in the asthenosphere.