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To determine what conditions are necessary for rust to form on steel wool. To determine what conditions are necessary for rust to form on steel wool.

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Presentation on theme: "To determine what conditions are necessary for rust to form on steel wool. To determine what conditions are necessary for rust to form on steel wool."— Presentation transcript:

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2 To determine what conditions are necessary for rust to form on steel wool. To determine what conditions are necessary for rust to form on steel wool.

3 Write a hypothesis using the IF, THEN, BECAUSE format. Write a hypothesis using the IF, THEN, BECAUSE format.

4 Manipulated: Manipulated: The amount of water. Responding: Responding: The amount of rust. Controlled: Controlled: 1. The amount of steel wool 2. The amount of time

5 steel wool steel wool 3 cups 3 cups water water scissors scissors

6 1. Gather your materials. 2. Using the scissors, cut the steel wool into 3 equal size pieces. 3. Place one piece of steel wool into a cup filled to the top with water. 4. Place a second piece of steel wool in a cup with a small amount of water. * The water should touch but not cover the steel wool. *

7 5. Place a third piece of steel wool in a cup with no water. 6. Allow the 3 cups to sit for 72 hours. 7. Observe the appearance of the steel wool in each container and record your results in table Clean up.

8 Cup Number Labeled drawing of steel wool before Labeled drawing of the steel wool after Rust Rank (amount of rust) 1 = least 3= most 1 Full of water 2 Small amount of water 3 No water

9 Make a bar graph of the rust rank of the 3 cups. (remember to include a title and labels for each axis. Make a bar graph of the rust rank of the 3 cups. (remember to include a title and labels for each axis. Write your conclusion following the format on the How to write an 8 th grade lab write-up handout. Write your conclusion following the format on the How to write an 8 th grade lab write-up handout.


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