Section A: True or false Instructions: write True\" or \"False\" in the blank sp

Question

Section A: True or false Instructions: write True" or "False" in the blank space. Answer all. Worth 54 mark each. Spend approximately 30 minutes. 1. We live in the geological period known as the Pleistocene. 2. A dyke forms in bedrock where liquid magma is forced across the existing layers. 3. Subduction zones exist at lithospheric hot spots. 4. Large masses of molten rock rising through the lithosphere are called diapirs. 5. Mid-ocean ridges are formed at converging plate boundaries. 6. Marble is a kind of sedimentary rock. 7. Granite is an igneous rock made up of the minerals quartz, augite and hornblende. 8. The chemical formula for the mineral halite is Caso. 9 More than 90% ofan earthquake's energy is used up in crustal deformation and heat generation. 10. Rayleigh-waves are seismic waves from earthquakes that travel through the core of the earth

Explanation / Answer

1. False

The Pleistocene is the geological epoch which lasted from about 2,588,000 to 11,700 years ago

2. True.

Dykes cross the existing layer

3.True.

Subduction zone volcanism occurswhere two plates are converging on one another.

4.True

Diapiris is the molten rock emerging from inside the Earth

5.False

It is formed by divergent plate

6. True

7. True

8. False

NaCl is for Halite

9

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