5 Questions
What are the three main types of rocks?
Igneous, sedimentary, and metamorphic
How are igneous rocks formed?
Through the cooling and solidification of magma or lava
What are the two forms in which igneous rocks solidify?
Intrusive and extrusive rocks
What percentage of the top 16 kilometers of the Earth's surface do igneous and metamorphic rocks make up?
90–95%
What causes the melting of existing rocks to form magma?
An increase in temperature, a decrease in pressure, or a change in composition
Test your knowledge of igneous rocks with this quiz! Explore how they form from magma or lava, and learn about their different types and characteristics.
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