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astronomical Unit: The average distance from the Earth to the sun, about 150 million kilometers. AU Powerpoint
astronomy: The study of the moon, stars, and other objects in space.
buoyant force: The upward force exerted by a fluid on a submerged object.
chemistry: The study of the properties of matter and how matter changes.
density: density is the amount of material in a given unit of volume. D=m/v
electron: A tiny, negatively charge, high-energy particle that moves around the nucleus of an atom.
force: A push or a pull exerted on an object.
galaxy: A giant structure that contains hundreds of billions of stars. galaxy photos
heliocentric: A description of the solar system in which all of the planets revolve around the sun.
ion: An atom or group of atoms that has become electrically charged.
joule: A unit of work equal to one newton-meter.
kinetic energy: Energy that an object has due to its motion.
liquid: a state of matter that has no definate shape but has a definate volume.
Mass: Mass is the amount of material in an object. Mass can be determined using a balance. (triple beam balance) Mass =d x v
neutrons: small uncharged particles in the nucleus of an atom..
orbit: The path of an object as it revolves around another object in space.
parallax: The apparent shift in position of an object when seen from different places. parallax activity
quasar: A distant galaxy with a black hole at its center.
reactant: a substance that enters into a chemical reaction.
solar eclipse: The blocking of sunlight to Earth that occurs when the moon is between the sun and Earth.
tide: the rise and fall of water in the ocean. Tidal bulge PP video
umbra: the darkest part of a shadow, as in an eclipse.
Volume: Volume is the amount of space an object takes up. Volume can be determined using Length x Width x Height for a rectangular object, or by using the displacement method. (using a graduated cylinder) V=m/d
weight: A measure of the force of gravity on an object.
X-rays: electromagnetic waves with higher frequencies than ultraviolet rays, but shorter than gamma rays.
y-axis: usually the axis on a graph where the responding variable is plotted.