1) An experiment looked at how the temperature of the water affects the time taken for sugar to dissolve. The independent variable is... a) the temperature of the water b) the time taken for the sugar to dissolve c) the number of times the mixture is stirred d) the mass of the sugar 2) An experiment looked at how the temperature of the water affects the time taken for sugar to dissolve. The dependent variable is... a) the mass of the sugar b) the time taken for the sugar to dissolve c) the number of times the mixture is stirred d) the temperature of the water 3) An experiment looked at how the temperature of the water affects the time taken for sugar to dissolve. The two control variables are... a) the time taken for the sugar to dissolve b) the temperature of the water c) the number of times the mixture is stirred d) the mass of the sugar 4) What was the independent variable in this investigation? a) Temperature b) Rate of photosynthesis 5) An experiment looked at how the area of a sail on a boat affects how quickly the boat sails. The independent variable is... a) the weight of the boat b) the shape of the boat c) the speed of the boat d) the area of the sail on the boat 6) An experiment looked at how the area of a sail on a boat affects how quickly the boat sails. The dependent variable is... a) the area of the sail on the boat b) the speed of the boat c) the weight of the boat d) the shape of the boat 7) An experiment looked at how the area of a sail on a boat affects how quickly the boat sails. The two control variables are... a) the shape of the boat b) the speed of the boat c) the area of the sail on the boat d) the weight of the boat 8) A pupil investigated the following question. "Is the time that a candle in a jar burns for affected by the volume of the jar?" The independent variable is... a) the time that the candle burns for b) the size of the candle c) the volume of the jar 9) A pupil investigated the following question. "Is the time that a candle in a jar burns for affected by the volume of the jar?" The dependent variable is... a) the volume of the jar b) the time that the candle burns for c) the size of the candle 10) A pupil investigated the following question. "Is the time that a candle in a jar burns for affected by the volume of the jar?" The control variable is... a) the size of the candle b) the volume of the jar c) the time that the candle burns for 11) A student investigated the following question. "How does the height of the ramp affect the force needed to pull the wooden block up it?" The independent variable is... a) force needed to pull the wooden block b) the surface of the ramp c) the size of the wooden block d) the height of the ramp 12) A student investigated the following question. "How does the height of the ramp affect the force needed to pull the wooden block up it?" The dependent variable is... a) force needed to pull the wooden block b) the height of the ramp c) the size of the wooden block d) the surface of the ramp 13) A student investigated the following question. "How does the height of the ramp affect the force needed to pull the wooden block up it?" The two control variable is... a) the height of the ramp b) force needed to pull the wooden block c) the size of the wooden block d) the surface of the ramp

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