The crystals in each mineral are the same shape.
Earth's landforms change constantly.
All around the world, each mineral has the same chemical composition.
Plants and animals can cause weathering.
Most rocks are made from different combinations of minerals
Moving water or ice and waves are causes of erosion.
A mineral can be identified by color alone.
When lava cools quickly, large crystals form.
Deltas are not formed from deposited material.
In sedimentary rocks, the weight of the layers, sticky clay minerals in the sediment, and natural chemicals do not hold the particles together.
Huge boulders are rocks and so are single grains of sand.
Metamorphic rock can form from sedimentary, igneous and other metamorphic rocks.
Rocks are constantly formed and destroyed.
All minerals have a streak that match their color.