| A | B |
|---|
| soil | a mixture of living & nonliving materials & decayed materials from organisms |
| weathering | a slow process that breaks rocks into smaller pieces called sediments |
| organic matter | living materials & materials that were once alive |
| inorganic matter | all the nonliving materials in soil |
| erosion | the movement of materials from one place to another |
| deposition | the process of laying down materials, such as rocks and soil |
| plate | a section of Earth's lithosphere |
| constructive force | forces that build new features on Earth’s surface |
| destructive force | wearing away or tearing down of Earth’s features |
| renewable resource | resources that can be replaced |
| inexhaustible resource | resources that will not run out |
| nonrenewable resource | resources that either cannot be replaced, or cannot be replaced as fast as used |
| basic layers of soil are | topsoil, subsoil, & bedrock |
| kinds of soil are | clay, silt, & sand |
| Most of Earth's erosion is caused by | moving water |
| causes of beach erosion are | waves, storms, tides, & currents |
| Farmers can help to prevent erosion by | plowing furrows perpendicular to slopes |
| Mountains form, earthquakes occur, & volcanoes erupt along | plate boundaries |
| If a force on Earth builds up it is | constructive |
| If a force wears away or tears down on Earth it is | destructive |
| types of natural resources are | renewable, nonrenewable, & inexhaustable |
| types of renewable energy resources are | wood, leaves, food wastes, & manure |
| types of inexhaustible energy resources are | sun, wind, moving water, energy inside the Earth |
| geothermal energy | energy from inside the Earth |
| types of nonrenewable resources | nuclear energy & fossil fuels |
| a natural pollutant | a volcano that sends dust, ash, and other particles into the air |
| pollutant | an unwanted substance added to the water, air, or soil |
| pollution can be... | natural or man-made |
