exam lesson name: basics of earth science exam number: 700934rr exam guidelines exam instructions question…

exam lesson name: basics of earth science exam number: 700934rr exam guidelines exam instructions question 15 of 20 : select the best answer for the question. 15. whats the most common extrusive igneous rock on earth? a. basalt b. obsidian c. pumice d. rhyolite mark for review (will be highlighted on the review page) << previous question next question >>

exam lesson name: basics of earth science exam number: 700934rr exam guidelines exam instructions question 15 of 20 : select the best answer for the question. 15. whats the most common extrusive igneous rock on earth? a. basalt b. obsidian c. pumice d. rhyolite mark for review (will be highlighted on the review page) << previous question next question >>

Answer

Brief Explanations:

Extrusive igneous rocks form from lava that cools quickly on the Earth's surface. Basalt is the most common extrusive igneous rock, often found in ocean - floor crust and in volcanic areas.

Answer:

A. Basalt