1. What is Science?

2. Variables are the things that are changed in the experiment

3. 3 types of variables:

4. 1. Independent variable is what the scientist changes
1. Independent variable is what the scientist changes. There is only 1 of these.

5. 2. Dependent variable The variable that might change because of what the scientist changes
– what is
being
measured

6. 3. Constant variable The thing(s) that are not changed in experiment
-also called control

7. Ex: If I leave all the lights on all day,
then my electric bill will be expensive
Independent Variable:_______________
Dependent Variable:________________

8. If I brush my cat more, then there will be less fur on my furniture
Independent Variable:_______________
Dependent Variable:_______________

9. Elizabeth wanted to test if temperature affected how fast milk goes bad and curdles. She left milk in a room temperature closet, a fridge, and a oven that was turned on low heat. She then measured how rotten the milk was after 10 days.
Independent Variable:_______________
Dependent Variable:_______________

10. Rachel counted the leaves on each of three plants
Rachel counted the leaves on each of three plants. Then she put one plant under a blue light bulb, another plant under a yellow light bulb, and a third plant under a white light bulb. She kept all three lights on from 6:00 a.m. to 9:00 p.m. After 2 months, she counted how many leaves each plant had.
Name the independent variable, the dependent variable and 3 constant variables?