Materials/Procedure

Materials:

• Goggles

• Black Markers

• Strips of Filter Papers

• Metric Ruler

• Plastic Cup

• Rubbing Alcohol
• Tape

• Pencil

Procedure:

1.Using the ruler, cut the filter paper into long, rectangular strips, about 3 cm x 10cm. (You need 2)

2.Measure 0.5 cm from the bottom of the paper strip and draw a horizontal line with your pencil across the width of the strip. Then, use the black marker to make a dot on the pencil line.

3.Tape the paper strip around the pencil so that the very bottom of the strip touches the alcohol.