1. List the steps of the scientific method that you remember.

2. What is the Scientific Method?
It is a process that is used to find answers to questions about the world around us.

3. A hypothesis is a prediction of what you think your results will be (based on research)

4. Variables
Variable held Constant: What Stays the SAME during the experiment because you are not testing it
Independent variable: What YOU CHANGE during the experiment
Dependent variable: How you test the independent variable (what YOU OBSERVE or MEASURE)

5. Control Group
The “normal” – the group or set-up that does not receive the independent variable
Used to create a comparison with the test groups

6. 1. Independent Variable
2. Dependent Variable
3. ONE Variable held Constant
1. Independent Variable- Special Juice
2. Dependent Variable- Productivity of workers
3. ONE Variable held Constant- Same number of workers

7. 1. Independent Variable
2. Dependent Variable
3. ONE Variable held Constant
1. Independent Variable- Coconut Juice
2. Dependent Variable- Amount of green slime
3. ONE Variable held Constant- Same shower

8. 1. Independent Variable
2. Dependent Variable
3. ONE Variable held Constant
1. Independent Variable- what itching powder the test subject received
2. Dependent Variable- length of itchiness
3. ONE Variable held Constant- same amount of powder used

9. Scientific Method – Controls and Variables
SpongeBob and his Bikini Bottom Pals have been busy doing a little research.
For each experiment, determine the
Control Group
Constant Variables
The Independent Variable
The Dependent Variable

10. Marshmallow Muscles
Larry was told that a certain muscle cream was the newest best thing on the market and claims to double a person’s muscle power when used as part of a muscle-building workout. Interested in this product, he buys the special muscle cream and recruits Patrick and SpongeBob to help him with an experiment.
Larry develops a special marshmallow weight-lifting program for Patrick and SpongeBob. He meets with them once every day for a period of 2 weeks and keeps track of their results.
Before each session Patrick’s arms and back are lathered in the muscle cream, while Sponge Bob’s arms and back are lathered with the regular lotion.
Control Group
Constant Variables
The Independent Variable
The Dependent Variable
Control Group- Sponge BOB
Constant Variables-amount of time, same program
The Independent Variable-muscle cream
The Dependent Variable- amount of muscle power

11. Question Independent Variable (What I change)
Dependent Variables (What I observe)
Variable held Constant (What I keep the same)
Does heating a cup of water allow it to dissolve more sugar?
Temperature of the water measured in degrees Centigrade
Amount of sugar that dissolves completely measured in grams
Stirring
Type of sugar
Size of cup
Amount of water
Does fertilizer make a plant grow bigger?
Amount of fertilizer measured in grams
Growth of the plant measured by its height
Growth of the plant measured by the number of leaves
Size of pot
Type of plant in each pot
Type and amount of soil
Amount of water and light
Measurements of growth taken at equal times

12. Control Group
The Independent Variable
The Dependent Variable
Control Variables- same materials for bottle
The Independent Variable- length of tubing for bottles nose cone
The Dependent Variable- amount of time in air (aloft)