9781422274552

migrating moving periodically or seasonally

neutron an elementary particle with zero charge and the same mass as that of a proton; enters into the structure of the atomic nucleus

oil spill a thin film of oil floating on the top of water

pesticide a chemical used to kill pests, such as insects

precious of high worth or cost

remote something that can’t be accessed and is lightly populated

seabed the bottom of a sea or ocean

solar cell a cell that converts solar energy into electrical energy

steeply in a steep manner (a sharp rise or fall)

sustainable capable of being sustained

thermostat a device for regulating temperature automatically by starting or stopping the supply of heat

ultimately as the end result of a process

unbleached not artificially colored or bleached

windbreak a fence of trees designed to lessen the force of wind

Preserving Energy

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