To conduct this experiment, a basketball, a volleyball, a soccer ball and a medicine ball were compared. Each ball was weighed on scales, before being dropped from a marker exactly 2 metres from the floor. The time each ball took to fall was timed on a stopwatch. The type of ball is the ____ variable. The distance for the ball to fall is the ____ variable. The time taken for the ball to fall is the ____ variable. Fifteen white roses were cut and placed into 3 separate beakers (5 roses per beaker). Each beaker contained 250 ml of water. Beaker 1 also contained five drops of blue food dye, beaker 2 also contained five drops of red food dye, and beaker 3 contained no food dye. The beakers were then placed on a windowsill and the colour of the flowers monitored twice a day for a week. Judging the intensity of the flower colour is the ____ variable. Using 250mL of water per beaker is the ____ variable. The colour of the food dye is the ____ variable. The temperature of ten open cans of soft drink (five cans of Coca-Cola, and five cans of Pepsi) were measured with a thermometer. The cans were then placed in a refrigerator. The temperature of the cans was then measured again after five hours. The time taken for the cans to cool is the ____ variable. The change in temperature of the cans is the ____ variable. The type of soft drink (Pepsi or Coca-Cola) is the ____ variable. Two identical fish tanks each contained one goldfish. One tank had 1g of fish food added daily, and the other had 5g of fish food added daily. The mass of each fish was measured daily for five days. The mass of the fish is the ____ variable. The mass of the food is the ____ variable. The type of fish is the ____ variable. Twenty students took a test of memory. Ten of the students played video games for 5 minutes beforehand, while the other ten students sat quietly for 5 minutes. The score on the memory test is the ____ variable. Playing video games or not is the ____ variable. The type of memory test used is the ____ variable.

Year 7 Science: What Variable?

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