Review the images of four igneous rock types. Use the images to answer the questions below. Enter your answers in the textbox below.
Rhyolite
Basalt
Gabbro
Granite
Think about the different characteristics that are used to distinguish different types of igneous rock.
1) Divide the four igneous rocks shown above into TWO groups of your choosing.
2) What igneous rock characteristic did you use to determine which rocks belong in each group?
Using a different set of rock properties, divide the rocks up again into TWO different groups.
3) This time, what different igneous rock characteristic did you use to determine which rocks belong in each group?