| Outer Core | | molten rock generated within the earth |
| Inner Core | | of igneous rock that has solidified beneath the earth's surface |
| Weathering | | the point inside the Earth where an earthquake begins |
| Fold | | fossil fuel consisting of carbonized vegetable matter deposited in the Carboniferous period |
| Fault | | a hard crystalline metamorphic rock that takes a high polish |
| Coal | | the gradual movement and formation of continents (as described by plate tectonics) |
| Mantle | | a composite rock made up of particles of varying size |
| Conglomerate | | forms when sand, mud, and pebbles at the bottom of rivers and oceans pile up and cement together |
| Limestone | | shaking and vibration at the surface of the earth resulting from underground movement along a fault plane of from volcanic activity |
| Plutonic | | liquid rock on Earth's crust |
| Richter Scale | | plutonic igneous rock having visibly crystalline texture |
| Volcanic | | Sections of the Earth's crust that move due to convection currents. |
| Volcano | | a bend in rock that forms where part of the earth's crust is compressed. |
| Slate | | (geology) a crack in the earth's crust resulting from the displacement of one side with respect to the other |
| Crust | | the process that crumbles, cracks, and breaks rocks (slow change by wind and water) |
| Continental Drift | | condition in which the earth's surface is worn away by the action of water and wind |
| Magma | | Rocks formed when other rocks are put under extreme heat and pressure |
| Earthquake | | a measuring instrument for detecting and measuring the intensity and direction and duration of movements of the ground (as an earthquake) |
| Anticline | | # an objective measure of the strength of an earthquake. It measures the degree of magnitude. |
| Metamorphic Rock | | A location on the surface of the Earth directly above the point(focus) where an earthquake occurs. |
| Granite | | Liquid layer below the mantle. It is probaly made of melted iron. |
| Seismograph | | a sedimentary rock consisting of sand consolidated with some cement (clay or quartz etc.) |
| Lava | | a fine-grained metamorphic rock that can be split into thin layers |
| Shale | | Outer layer of Earth composed of tectonic plates. |
| Syncline | | a sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals |
| Sedimentary Rock | | igneous- very light gray to a medium gray- contains a large number of gas bubbles each surrounded by a thin layer of volcanic glass- looks something like a sponge- very light weight- most pieces will float in water- flow lines or bands may show |
| Basalt | | a mountain that forms when magma reaches the surface |
| Erosion | | rock that solidified from magma |
| Sandstone | | an upward bend or fold in a rock layer |
| Tectonic Plates | | solid, dense center of the Earth |
| Marble | | ard metamorphic rock consisting essentially of interlocking quartz crystals |
| Focus | | a hypothetical continent that (according to plate tectonic theory) broke up later into India and Australia and Africa and South America and Antarctica |
| Quartzite | | the commonest type of solidified lava |
| Epicentre | | Circular currents in the mantle caused by the magma being heated by the core off the Earth. |
| Gondawanaland | | the middle layer of the earth and is found just below the crust |
| Convection Currents | | a downward bend or fold in a rock layer |
| Igneous Rock | | a sedimentary rock formed by the deposition of successive layers of clay |
| Pumice | | igneous rock produced by eruption and solidified on or near the earth's surface |
