Matching Pairs Variables in ScienceOnline version Can you tell the difference between independent, dependent and control variables? Use the lyrics of the song we learned to help you out. Independent variables are ones you change Independent variables are ones you change Dependent ones you measure Get it wrong you’ll feel displeasure Independent variables are ones you change Now control variables: all stay the same Control variables: they stay the same It’s so we can compare And the test we do is fair Now control variables all stay the same by Laura Smith 1 Example 1-Laundry detergent Tide and laundry detergent All 2 Example 3- Same cat, same time of day, same amount of food in each bowl. 3 Example 1- The stain is the same, the washer is the same, the wash cycle is the same. 4 Example 2- I have some plants in the dark, some in the window and some in the middle of a room. 5 Example 3- 3 bowls, one with chicken cat food, one with salmon cat food and one with beef cat food. 6 Example 3- I measure how much food is left in each bowl to see how much of each my cat ate. 7 Example 1- The shirt is cleaner. 8 Example 2- The plants in the dark did not grow at all, the ones in the sunshine grew an inch in a week, and the ones in the middle grew half an inch in a week. 9 Example 2- Same kind of plants, same amount of water and fertilizer, same soil, same size pot. Example 2- Dependent variable Example 1- Dependent variable Example 3- Dependent variable Example 1- Controlled variables Example 2- Independent variable Example 1-Independent variable Example 3- Independent variable Example 2- Controlled variables Example 3- Controlled variables