To determine the best To determine the best conditions for rust to form conditions for rust to form on steel wool.on steel wool.

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

Manipulated:Manipulated: The amount of water.The amount of water.

Responding:Responding: The amount of rust.The amount of rust.

Controlled:Controlled: 1.1. The amount of steel wool The amount of steel wool 2.2. The amount of time The amount of time

steel woolsteel wool 3 cups3 cups waterwater scissorsscissors masking tapemasking tape

1.1. Gather lab materials.Gather lab materials.2.2. Using the masking tape, label the cups Using the masking tape, label the cups

with group member names and class with group member names and class period.period.

3.3. Using the scissors, cut the steel wool into Using the scissors, cut the steel wool into 3 equal size pieces. 3 equal size pieces. BE EXTREMELY CAREFULBE EXTREMELY CAREFUL

4.4. Place one piece of steel wool into a cup Place one piece of steel wool into a cup and then fill the cup to the top with water.and then fill the cup to the top with water.

5.5. Place another piece of steel wool into a 2Place another piece of steel wool into a 2ndnd cup and then fill the cup so half the steel cup and then fill the cup so half the steel wool is below water and half is above wool is below water and half is above water.water.

6.6. Place the last piece of steel wool Place the last piece of steel wool into the 3into the 3rdrd cup and add no water. cup and add no water.

7.7. Place the 3 cups on the side Place the 3 cups on the side counter and allow the cups to sit counter and allow the cups to sit for 48 hours.for 48 hours.

8.8. Observe the appearance of the Observe the appearance of the steel wool in each cup and record steel wool in each cup and record the results in data table 1.the results in data table 1.

9.9. Clean up.Clean up.

Cup Number

Labeled drawing of steel wool

before

Labeled drawing of the steel

wool after

Rust Rating(amount of

rust)1 = least3= most

1 Full of water

2Small amount of

water3

No water

• Make a bar graph of the rust rating Make a bar graph of the rust rating of the 3 cups. (remember to include of the 3 cups. (remember to include a title and labels for each axis.a title and labels for each axis.• Write your conclusion following Write your conclusion following the format on the “How to write an the format on the “How to write an 88thth grade lab write-up” handout. grade lab write-up” handout.