Which statement best defines igneous rock?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Preparing for the Grade 9 Canadian Geography Exam? Study with engaging questions and thorough explanations to ace your test. Enhance your geography skills now!

Multiple Choice

Which statement best defines igneous rock?

Explanation:
Rocks are classified by how they form. Igneous rocks form from molten material that cools and solidifies, whether that happens underground as magma or on the surface as lava. This is why the statement about solidification of molten magma is the best description. The other descriptions fit other rock types: sedimentary rocks form when sediments are compacted and cemented; chemical sedimentary rocks form by precipitation from mineral-rich solutions; metamorphic rocks are created when existing rocks are altered by heat, pressure, and chemical processes without melting. So the defining idea is the cooling and solidification of molten rock.

Rocks are classified by how they form. Igneous rocks form from molten material that cools and solidifies, whether that happens underground as magma or on the surface as lava. This is why the statement about solidification of molten magma is the best description. The other descriptions fit other rock types: sedimentary rocks form when sediments are compacted and cemented; chemical sedimentary rocks form by precipitation from mineral-rich solutions; metamorphic rocks are created when existing rocks are altered by heat, pressure, and chemical processes without melting. So the defining idea is the cooling and solidification of molten rock.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy