Which of the following groups of rocks is formed as a result of volcanic eruption?

Assessment: WAEC SSCE - Agricultural Science - 2011 (Objective) Subject: Agricultural Science

Question 1 Report

Which of the following groups of rocks is formed as a result of volcanic eruption?
Answer Details
Basalt, granite and pumice are rocks formed as a result of volcanic eruption. When volcanoes erupt, molten lava and ash are released. These materials cool and solidify to form rocks. Basalt is a dark-colored fine-grained rock, formed from the cooling of lava. Granite is a coarse-grained rock formed from the slow cooling of magma deep underground. Pumice is a light-colored rock that forms from the cooling of frothy lava with trapped gas bubbles. Therefore, option B is the correct answer.
Read lesson note on Rocks (WAEC)
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