1. What is the depth of the Kola borehole as a percentage of the Earth’s radius?

Question

1. What is the depth of the Kola borehole as a percentage of the Earth’s radius? A. (123km / 637km) * 100 = 19.3% B. (123km / 6370km) * 100 = 1.93% C. (12.3km / 637km) * 100 = 1.93% D. (12.3km / 6370km) * 100 = 0.193% 2. What are alternative terms used in place of “extrusive” and “intrusive” igneous rock?

A. Magma and granite

B. Pumice and lava

C. Volcanic and plutonic

D. Vesicular and plutonic

2. What are alternative terms used in place of “extrusive” and “intrusive” igneous rock?

A. Magma and granite

B. Pumice and lava

C. Volcanic and plutonic

D. Vesicular and plutonic

Note: I have experienced intermittent problems accessing the website used to answer #3. You may use the graphic below to answer this question if you encounter this issue.

3. During the Devonian Period, where is North America located relative to the Equator? (Hint: if using the website to answer this question, go to “Close-up: Phanerozoic Eon,” then click on Devonian in the time scale image.)

A. Predominately east of the equator

B. Predominately west of the equator

C. Predominately north of the equator

D. Predominately south of the equator

Explanation / Answer

As per norms I should answer for 1st question only

1) kola borehole depth = 12.3 Km

Radius of earth = 6370 Km

then, percentage = kola borehole depth *100 / radius of earth

= 12.3 *100 /6370 % = 0.193 %

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