| A | B |
|---|
| attoll | a ring-shaped coral island found far from land |
| organic rock | chalk formed from sediments made of skeletons of microscopic living things in the ocean |
| granite | the most abundant intrusive rock form |
| the rock cycle | a series of procsses on Earth's surface and interior that slowy changes rocks from one kind to another |
| corse grained | when all the grains in a rock are large and easy to see |
| mantle | in rock cycle, some rocks melt and form magma in this layer of Earth |
| density | refers to the amount of mass in a given space |
| vein | a narrow channel of a mineral in the crust that is much different from the surrouning rock |
