arid: A description of dry areas of the world, where the climate brings too
little rainfall or other precipitation to support much plant growth.
astronaut: Someone trained to travel into space for research and exploration.
atom: The basic unit of a chemical element. Atoms are made up of a dense nucleus that contains positively charged protons and uncharged neutrons. The nucleus is orbited by a cloud of negatively charged electrons.
battery: A device that can convert chemical energy into electrical energy.
colleague: Someone who works with another; a co-worker or team member.
electrolyte: A non-metallic liquid or solid that conducts ions — electrically charged atoms or molecules — to carry electrical charges. (Certain minerals in blood or other bodily fluids can serve as the ions that move to carry a charge.) Electrolytes also can serve as the ions that move positive charges within a battery or capacitor. (in health) Chemicals dissolved in water throughout the body, which develop an electrical charge (positive or negative) once dissolved. They help regulate chemical reactions in the body, including the balance of fluids in and outside of all cells.
filter: (n.) Something that allows some materials to pass through but not others, based on their size or some other feature. (v.) The process of screening some things out on the basis of traits such as size, density, electric charge.
filtration: The process of using a fabric, screen or some other type of material — known as filters — to prevent something from moving through. Drapes can limit the filtration of sunlight into a room. A wire mesh can filter large particles from water or the air. Sand or soils can provide filtration to keep some waterborne chemicals or germs from reaching groundwater.
forest: An area of land covered mostly with trees and other woody plants.
function: The specific role some structure or device plays. (in math) A relationship between two or more variables…
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