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Information contained here is taken from Junction Hill

Information contained here is taken from Junction Hill. A Successful Science Fair Project Must Contain:. Where Do You Begin. Variables. Independent Variable. The Independent variable is the item you are testing within the experiment. Examples might be: Height of a ramp Amount of salt.

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Information contained here is taken from Junction Hill

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  1. Information contained here is taken from Junction Hill

  2. A Successful Science Fair Project Must Contain:

  3. Where Do You Begin

  4. Variables

  5. Independent Variable • The Independent variable is the item you are testing within the experiment. • Examples might be: Height of a ramp Amount of salt 8 cm 6 cm 4 cm 1 teaspoon or 10 grams 2 teaspoons or 20 grams 3 teaspoons or 30 grams

  6. Dependent Variable • The dependent variable is the item you are using to measure the effect of the independent variable • Examples might be: Distance The Car Travelled 60.2 cm Time it takes the salt water to freeze Salt Water Ice Cube froze in 27 min 22 sec or 1642 sec

  7. A Problem Statement

  8. Examples of Problem Statements

  9. Examples of Hypothesis

  10. Example of Independent Variables

  11. Example of Dependent Variables 4 cm 6 cm 8 cm Whether we are measuring the distance a car will travel down ramps of different heights, or if we are measuring the time it takes water with different amounts of salt to freeze, the measurements are considered our dependent variable

  12. Control Variables Controls in Experiment 2 When dissolving salt, use the same amount of water Ice cubes must be the same size Freeze at the same temperature

  13. List of Materials A list of materials is necessary in case someone wants to perform the experiment

  14. Procedure Experiment 1 Experiment 2 Place cardboard on a table Lift and place one 4cm block under and on one side of the cardboard Place car at the top of the cardboard ramp Release car with NO added force Once car comes to a rest, measure the distance from the bottom of the ramp to the front of the car Record the distance and repeat four more times. Calculate and record the average of the five runs Repeat steps 2-5 for the 6cm and 8cm block Place 6 oz or 5oml of water in a jar Pour 1 teaspoon or 10 grams of salt in the water and stir until salt has completely dissolved Pour salt water solution into an ice tray. Be sure to measure the exact amount and record Place ice tray into the freezer portion of a refrigerator, close freezer door and begin recording time as your start time. Once the ice cube is completely frozen, record the time as your stop time. Calculate the time for the ice cube to freeze by subtracting the start time from the stop time. Repeat steps 1-5 for the 2 teaspoon and the 3 teaspoon samples

  15. Data Table Experiment 1 Experiment 2

  16. Graph A graph is a visual representation which provides a way to easily understand the data 2100 1800 180 1500 150 Distance Car Travelled (cm) 1200 120 Time to Freeze Ice Cube (seconds) 900 90 600 60 30 300 4cm 2 or 20 6cm 8cm 1 or 10 3 or 30 Amount of salt (grams or tsp) Height of Ramp (cm)

  17. Experiment 2 Conclusion Conclusion My hypothesis was correct, the ice cube with the least amount of salt froze in the shortest period of time. I think the reason this ice cube froze this quickest is because salt contains heat energy which slows the rate of temperature change in the water Original hypothesis I think the ice cube with the least amount of salt (1 tsp) will freeze in the shortest period of time

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