Science questions for lab blogger

1.  What are differences between metamorphic, sedimentary, and igneous rocks?
Ans. metamorphic are underwent changes due pressure and heat. sedimentary are broken down by wind and water into tiny pieces. igneous are from magma and molten rocks cools. 

2.  What rock did you find the most interesting?  Why?
Ans. Obsidian because it's look like diamond even though it come from magma.  

3.  What are grains in the rocks?  can  you show me?
Ans. The particles in rocks. Sedimentary are made from many small grains (particles) and are often soft and porous.
4.  What are the crystals in the rocks?  can you show me?
Ans. igneous rocks contain interlocking crystals which are held together very strongly and make the rock hard.