Limestone is a common organic. Sedimentary rocks often have layers, small particles. Metamorphic rock forms from very high temperatures and pressures often deep within the earth. Students will generate written products to discover the characteristics of igneous rocks as found in the student text page 330. A Rock is a mixture of one or more minerals.
Rocks can also contain mineraloids, glass or organic particles of various sorts.
Granite has mineral pieces large enough to see. Minerals found in Granite are often Mica , Quartz , Feldspar , and Hornblende . Granite does not weather easily because the minerals are so interlocked. Lava is molten rock after it has been extruded from the ground. Magma is molten rock that is not yet extruded from the ground.