Fragments that makes up a rock

The grain size and the way grains fit together in a rock

Molten or liquid rock underground

Molten rock that erupts on Earth's surface is...

Rock material that forms where rocks are broken down into smaller pieces or dissolved in water as rocks erode

The series of processes that change one type of rock into another type of rock

When volcanic material erupts and cools and crystallizes on Earth's surface, it forms a type of igneous rock called...

Rock that forms when lava cools too quickly to form crystals

Igneous rocks that form as magma cools underground