5 - Earth structure, volcanic activity

Complete the sentence. The molten rock mass below the earth´s surface is called...

Mark the correct answer. The place where the magma flows to the surface

• crater

• magmatic fireplace

Mark the correct answer. What is the temperature of magma?

• 60 to 120˚C

• 600 to 1200˚C

• 1600 to 6000˚C

Mark the correct answer. The thickness of the ocean´s crust is?

• 18 km

• 70 km

• 8 km

Mark the correct answer. The device for measuring earthquake shocks is called...

• seismograph

• sizmoprah

Mark the correct answer. What is the scale by which we determine the strength of an earthquake?

• Richter scale

• Anna scale

• David scale

Complete the sentence. What causes an earthquake occurring under the sea?

Mark the correct answer. The construction of the Earth consists of ...

• Earth core

• land soil

• Earth´s mantle

• Earth bark