What are the three rock types?

There are two types of weathering: physical and emotional.

Igneous rocks are classified based on

Texture of a rock refers to the size, shapes and arrangement of the grains or crystals.

Extrusive rocks are ______ grained, whereas intrusive rocks are ______ grained.

Extrusive rocks cool _____, whereas intrusive rocks cool _____.

Crystalline textures include

Non-crystalline textures include

The chemical composition of non-crystalline igneous rocks is typically rich in silica.

Rocks with a glassy or fragmental texture are intrusive.

For crystalline rocks, what characteristics are important for identification?

For non-crystalline rocks, what characteristics are important for identification?

What is a good analogy for porphyritic texture?

Which is false regarding phaneritic textures?

Mafic rocks are _____ coloured, felsic rocks are _____ coloured.

Gabbro has a crystalline texture.

Granite is porphyritic.

Select all of the samples that we looked at in the lab that were NON-crystalline.

How many cooling stages did porphyritic andesite go through?

What is the texture of pumice?

Which of the following is a mineral that would NOT be likely to be found in granite?

Which of the following is a mineral that would NOT be likely to be found in gabbro?