Different types of Rocks
what type of rock is made by lava
Igneous rock
how is a rock made
by layers of sediment
how do scientist study rocks
by the color and texture
how is obsidian made
from magma that erupted out of a volcano
what rocks are made by mountains
metamorphic rock
what happens when water goes in rocks
the water freezes and expands and breaks the rock
what happens when hot water is released underground
it forms crystals
what forms when igneous rocks break
they turn into sediment
what rock is made when sediment stacks on each other
sedimentary rock
how are cliffs formed
weathering and erosion
what happens when magma cools underground
mineral crystals start to form in molten rocks
what forms when sedimentary rock break
it turns to sand or mud
what happens when lave cools quickly
the rock that forms are glassy with no individual crystals
what happens when a rock melts
it turns into magma or lava
what happens when lava cools on earths surface
it forms solid rocks
when a rock gets hot
it expands
what happens when magma cools slowly
it takes a long time to form mineral crystals
what happens when a rock starts to break
erosion
what happens when magma cools quickly
the rock that forms is small and hard
what does erosion do to a rock
it creates cracks in the rock