Rocks for Kids

What is the study of Earth and its rocks called?

• Biology

• Astronomy

• Geology

• Meteorology

Which of the following is NOT a primary focus of geologists?

• The structure of the Earth

• How the Earth has changed over time

• The composition of distant stars

• How the Earth was made

What does it mean for something to be 'sustainable'?

• To use resources quickly without thought for the future

• To keep something working for a long time

• To make something new from old materials

• To study how things change over time

How are sedimentary rocks primarily formed?

• From intense heat and pressure deep within the Earth

• From molten lava cooling and hardening

• From particles of sand, shells, and pebbles pressed together over time

• From minerals growing slowly on the rock's surface

How are metamorphic rocks formed?

• By the cooling of magma

• From sediments

• Under the earth due to extreme heat and pressure

• By the wind

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How do igneous rocks form?

• By the cooling and hardening of magma

• Through the compression of sediments

• When existing rocks are altered by heat and pressure

• From the accumulation of organic matter

What is molten rock called when it is deep within the Earth?

• Lava

• Magma

• Obsidian

• Pumice

Which characteristic is typical of intrusive igneous rocks?

• They form on the Earth's surface and have small crystals.

• They are formed from compressed sediments.

• They cool slowly inside the Earth, allowing large crystals to form.

• They are altered by extreme heat and pressure.

Which rock is formed when lava cools extremely quickly on the Earth's surface, resulting in a shiny, glass-like texture with no crystals?

• Granite

• Basalt

• Obsidian

• Shale