An example of the scientific method:
Let's say I have a problem: My car won't start. How would I use the scientific method to solve this
; Purpose: I want my car to start
; Hypothesis: If I put gas in my car, it will start.
; Materials: 5 gallon gas can, 5 gallons gasoline, money to buy gasoline, a ride to the gas
; Procedure: First, I will call my friend Bill and ask for a ride to the gas station. I will take the five
gallon gas can and fill it with five gallons of gasoline at the pump. After paying the gas station
owner for the gasoline, I will get a ride back to my car and put the gasoline in the tank. Once
the gasoline is in the tank, I will attempt to restart the car.
; Results: The car started on the first try.
; Conclusion: When I put gas in my car, it started.
It's as simple as that!
Scientific Method Worksheet
For each of the examples below, find the independent variable, dependent variable, control(s), and constants; and then write an “If…then” hypothesis for the outcome.
1. Bailey wants to find out which frozen solid melts the fastest: soda, ice, or orange juice. She pours each of the three liquids into the empty cubes of an ice tray, and then places the ice tray in the freezer over night. The next day, she pulls the ice tray out and sets each cube on its own plate. She then waits and watches for them to melt. When the last part of the frozen liquid melts, she records the time.
2. Jack wants to find out which laundry detergent cleans the best. So, he takes a cotton sheet and cuts it up into equal squares. He stains four squares with chocolate, and four with grape juice. He washes one of each of the squares in each of the 3 detergents. One from each set of squares is washed in water alone. For each wash load, he used: the same amount of water, the same amount of detergent, and the same temperature of water.
3. Maverick wants to find out whether or not Miracle Grow really makes plants grow faster. He takes two identical pots, puts ? cup of dirt into each one, puts 3 pea plant seeds into each one, and tops each off with ? cup more dirt. He waters the plants the same amount at the same time each day. The only difference is that one plant is watered with regular water, while the other is watered with water that has Miracle Grow in it.