The naturally occurring material from which a mineral or minerals of economic value can be extracted

splits spontaneously or on impact with another particle, with the release of energy.

a weak bond between two molecules resulting from an electrostatic attraction between a proton in one molecule and an electronegative atom in the other.

is a mass of mineral crystals, mineraloid particles or rock particles

form when hot, molten rock crystallizes and solidifies.

are organic materials produced in a renewable manner.

refers to the harvest of a specific (self-renewing) natural resource—for example, timber or fish

is an electrical device that converts the energy of light directly into electricity by which is a physical and chemical phenomenon.

a brown deposit resembling soil, formed by the partial decomposition of vegetable matter in the wet acidic conditions of bogs and fens, and often cut out and dried for use as fuel and in gardening.

chief components of petroleum and natural gas

is a substance or energy introduced into the environment that has undesired effects, or adversely affects the usefulness of a resource.

is the hard, solid rock beneath surface materials such as soil and gravel.

comes from sources that will run out or will not be replenished for thousands or even millions of years

is a renewable energy source because heat is continuously produced inside the earth.

is a form of energy that harnesses the power of water in motion such as water flowing over a waterfall to generate electricity.

is land degradation in typically dry areas resulting from various factors, including climatic variations and human activities.

the regions of the surface, atmosphere, and hydrosphere of the earth (or analogous parts of other planets) occupied by living organisms

are prokaryotic microorganisms that are capable of transforming ammonia, that are usable by plants.

are materials from the Earth that are used to support life and meet people's needs.

the process of removing salt from seawater.

is one that can be used repeatedly and does not run out because it is naturally replaced.