1. Today In Science History
The element Meitnerium was founded.
It is a highly radioactive metal.
They don’t know when it’s melting point is.
Only a few atoms of the element have ever been created.

2. Metamorphic Rocks
Metamorphic Rocks are formed from sedimentary rocks, igneous rocks, or other metamorphic rocks that have been changed by HEAT or PRESSURE.

3. Metamorphic Rocks
Sandstone
Quartzite
Heat
Pressure

4. Metamorphic Rocks
Shale
Slate
Heat
Pressure

5. Metamorphic Rocks
Limestone
Marble
Heat
Pressure

6. Metamorphic Rocks
Granite
Gneiss
Heat
Pressure

7. Metamorphic Rocks

8. Metamorphic Rocks ALL ROCKS are classified by their: Origin
Composition
Texture

9. Metamorphic rocks are formed under ground by heat and/or pressure
- Origin -
How they are formed
Metamorphic rocks are formed under ground by heat and/or pressure
AND/ OR

10. - Composition - Composition is what the rock is made of.
Composition helps us determine how and where the rock was formed.
Index minerals- form only in metamorphic rock and help us to identify the temperature, depth, and pressure that was used to form the metamorphic rock

11. - Texture -
Texture is the position of the grains

12. - Foliated -
Mineral grains are arranged in bands or layers.

13. Mineral grains are not arranged in bands or layers.
- Non-Foliated -
Mineral grains are not arranged in bands or layers.