TYPES OF ROCKS

IGNEOUS ROCKS

• Igneous rocks form by lava
• Magma crystallizes to turn into a igneous rock
• It takes about a day or hours to cool down
• Igneous means fire-made
• Rocks made below the Earths surface is a intrusive rock and above surface is extrusive rocks.
• Some intrusive rocks take thousands of years to form.

How igneous rocks form

SEDIMENTARY ROCK

• These rocks are made by erosion
• Made by sediments building on top of each other and they stack by water, wind, and ice.
• Fossils can be found in sedimentary rocks
• Some have rocks and sand cause they get carried by water.
• Chalk is made from sedimentary rocks
• Limestone sometimes has shells or even bones from animals

SEDIMENTS IN WATER MOVING

METAMORPHIC ROCK

• Made by heat and pressure
• Can be formed from all the three types of rocks including metamorphic.
• Shale which is a soft rock formed a hard metamorphic rock called slate.
• Metamorphic rocks can be used for sidewalks we walk on everyday!
• Quartzite which is a metamorphic rock can be used to make glass

HEAT FOR METAMORPHIC ROCK

ROCK CYCLE