Quiz on Rocks and Minerals

What type of rock is formed from the cooling and solidification of magma or lava?

• Sedimentary Rocks

• Metamorphic Rocks

• Igneous Rocks

• Fossil Rocks

What is the primary characteristic of igneous rocks?

• Layered appearance

• Formed from magma or lava

• Contains fossils

• Formed by heat and pressure

Which type of igneous rock forms slowly?

• Extrusive

• Intrusive

• Sedimentary

• Metamorphic

What is the primary component of a volcanic eruption?

• Sediment

• Magma

• Water

• Soil

What is the primary focus when examining the texture of igneous rocks?

• The color of the rock

• The size, shape, and arrangement of crystals

• The weight of the rock

• The age of the rock

How does the rate of cooling influence igneous rocks?

• It changes the color

• It affects the texture

• It alters the weight

• It determines the age

What is the result of rapid cooling from lava in terms of mineral formation?

• Large mineral crystals form

• Mineral crystals cannot form

• Minerals of various sizes form

• Only small crystals form

What texture results from minerals crystallizing at different rates?

• Glassy texture

• Porphyritic texture

• Vesicular texture

• Granular texture

What happens to minerals during slow cooling?

• They do not crystallize

• They form a glassy texture

• They crystallize at different rates

• They form only small crystals

What type of composition do rocks with many dark silicate minerals and plagioclase feldspar have?

• Granite composition

• Basaltic composition

• Sedimentary composition

• Metamorphic composition