Lava is hot. melted rock. When lava cools it becomes rock. This kind of rock is called volcanic rock. It can also be called igneous rock.
volcanic rock
Lava is hot melted rock that comes out of a volcano. When it cools the lava becomes hard rock. This rock is called volcanic rock.
volcano
A volcano is an opening in the Earth’s crust. It is shaped like a point, with a hole in the middle. Sometimes a volcano can erupt. When it erupts, hot lava comes out of the volcano.
lava
Hot melted rock can flow from a volcano. This melted rock is called lava.
sedimentary rock
Over a very long time these tiny pieces of rocks can be pushed together, to make a bigger rock. This is called sedimentary rock.
sediment
Tiny pieces of rock that have broken off a mountain of canyon are called sedminet. Rivers carry sediment to new places.
erosion
Wind and water can break off tiny pieces of rock from a mountain or canyon. This is called erosion.
pressure
Things can push on other things. This is called pressure.
compression
Something can be pushed together very hard. Pressure pushing on something is called compression.
metamorphic rock
Metamorphic rocks are rock that is made inside the Earth. The Earth’s pressure and heat make a rock! Metamorphic rocks are made of minerals.
rock
Rocks are hard. Rocks are made of minerals. Minerals are inside of the Earth.
magma
Hot melted rock inside the Earth's surface is called magma.
minerals
Minerals come from inside of the Earth. Iron and coal are minerals that are inside of the Earth.