1) which is considered the 4th state of matter? a) solid b) liquid c) gas d) plasma e) orange f) orangeeeeeeeeeeeeeeeeeee 2) expand means... a) increase in volume b) decrease in volume c) shrink d) grow 3) what happens to a gas when it is heated? a) combusts b) spreads out c) expands d) BOOOOOOOOOM!!!!!!! 4) convection is... a) an item being heated on a certain place b) air circulating in a closed area c) a type of radiation d) the sun's heat 5) what type of energy does the sun use? a) contraction b) thermal c) convection d) radiation 6) what is it called when it changes from a solid to a liquid a) melting b) condensation c) sublimation d) freezing 7) can a solid exist as a pure substance? a) yes b) no 8) x-ray is a type of radiation a) true b) false 9) ultraviolet light is a type of convection a) true b) false 10) plasma is rare on earth a) true b) false

Heat and Energy

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