| A | B |
|---|
| humus | a material in soil made up of decayed plants and animals |
| landform | natural land feature on Earth's surface |
| fault | break or crack in rocks where Earth's crust can suddenly move |
| weathering | process of rocks in Earth's crust slowly being broken into smaller pieces |
| focus | place where tectonic plates start to slip |
| erosion | process of carrying away weathered bits of rock |
| reclamation | process of restoring land after it has been used |
| epicenter | point on Earth's surface that is directly above the focus of an earthquake |
| renewable resource | resource that can be replaced |
| volcano | opening in Earth's crust where gases, ash, and molten rock can reach the surface |
| nonrenewable resource | resource that exists in limited amounts or is used faster than it can be replaced in nature |
| pollution | waste from products made or used by people |
| deposition | the process of depositing weathered and eroded bits of rock and soil |
