What is the prefix kilo symbol and value - k and x 103 or 1000 (x1000), What is the prefix mega - M and x106 or 1000000 (x1000000), What is a transverse wave? - A wave in which the oscillations are perpendicular to the direction of wave propagation, What is a longitudinal wave? - A wave in which the oscillations are parallel to the direction of wave propagation, What is the speed of all EM waves in a vacuum/air? - 3x10⁸ms⁻¹ or 300,000,000 m/s, Name three particles an atom contains - protons, neutrons and electrons, What charge does a nucleus have - Postive, What charge does an atom have - Neutral, "_____________ of a substance is a measure of its particles."the mean kinetic energy - temperature, In all areas, except gas laws, the unit for temperature is - degrees celsius, Define displacement - Distance between two points in a straight line, Define velocity - change in displacement per second, Relationship relating displacement, velocity and time - s = vt, What is a planet? - Orbits a star, What is a galaxy? - Collection of stars, What is an exoplanet? - Planet orbiting another star,

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