Question

develop a hypothesis that answers the experimental question. write this statement below.

procedure:
surface tension can be measured and observed by dropping water (drop by drop) onto a penny. the more drops of water that you can fit, the greater the surface tension.
experiment:
carefully use a dropper to place drops of water on a penny. count how many drops of tap water can fit on your penny. do four trials and take an average.

repeat the process using water that has soap in it. soap types can vary; your instructor will provide the soapy water (it may be dish soap, shampoo, or laundry soap.)

tap water
trial 1: 14
trial 2: 11
trial 3: 14
trial 4: 9
average: 12

soapy water
trial 1: 6
trial 2: 9
trial 3: 9
trial 4: 14
average: 9

organize data - make a bar graph that compares the trials. be sure to label your x and y axis. color is optional.

graph grid image
bug image
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Explanation:

To create the bar graph for the given data (comparing the number of drops for Tap Water and Soapy Water across trials and their averages), follow these steps:

Step 1: Determine the Axes

• X - axis (Horizontal): Categories to compare. These are the “Trials” (Trial 1, Trial 2, Trial 3, Trial 4, Average) and the “Water Type” (Tap Water, Soapy Water).
• Y - axis (Vertical): Number of drops (range from 0 to 15, based on the data: max drops = 14).

Step 2: Prepare Data Points

Category	Tap Water Drops	Soapy Water Drops
Trial 2	11	9
Trial 3	14	9
Trial 4	9	14
Average	12	9

Step 3: Draw the Bar Graph

1. Label the X - axis: Mark the categories (Trial 1, Trial 2, Trial 3, Trial 4, Average) with two bars per category (one for Tap Water, one for Soapy Water).
2. Label the Y - axis: Mark intervals (e.g., 0, 2, 4, 6, 8, 10, 12, 14) to represent the number of drops.
3. Draw Bars:

• For each trial/average, draw a bar for Tap Water (height = number of drops) and a bar for Soapy Water (height = number of drops). Use different colors or patterns to distinguish Tap Water and Soapy Water.

Example Visualization (Text - based Sketch)

Number of Drops
|
|                ▓▓▓▓▓▓▓▓▓▓▓▓▓▓  (Tap Water: 14)
|                ▓▓▓▓▓▓        (Soapy Water: 6)
|        ▓▓▓▓▓▓▓▓▓▓▓▓          (Tap Water: 11)
|        ▓▓▓▓▓▓▓▓▓▓▓▓  ▓▓▓▓▓▓▓▓ (Soapy Water: 9)
|                ▓▓▓▓▓▓▓▓▓▓▓▓  ▓▓▓▓▓▓▓▓ (Tap Water: 14; Soapy Water: 9)
|  ▓▓▓▓▓▓▓▓        ▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓ (Tap Water: 9; Soapy Water: 14)
|  ▓▓▓▓▓▓▓▓▓▓▓▓    ▓▓▓▓▓▓▓▓        (Tap Water: 12; Soapy Water: 9)
|_____________________________________________________
          Trial 1   Trial 2   Trial 3   Trial 4   Average

Key Labels

• X - axis Title: “Trial / Average”
• Y - axis Title: “Number of Drops”
• Legend: Label the two bar colors/patterns as “Tap Water” and “Soapy Water”.

This bar graph visually compares the number of water drops (tap vs. soapy) across trials and their averages, highlighting the effect of soap on surface tension (fewer drops with soapy water, indicating lower surface tension).

Answer:

To create the bar graph for the given data (comparing the number of drops for Tap Water and Soapy Water across trials and their averages), follow these steps:

Step 1: Determine the Axes

• X - axis (Horizontal): Categories to compare. These are the “Trials” (Trial 1, Trial 2, Trial 3, Trial 4, Average) and the “Water Type” (Tap Water, Soapy Water).
• Y - axis (Vertical): Number of drops (range from 0 to 15, based on the data: max drops = 14).

Step 2: Prepare Data Points

Category	Tap Water Drops	Soapy Water Drops
Trial 2	11	9
Trial 3	14	9
Trial 4	9	14
Average	12	9

Step 3: Draw the Bar Graph

1. Label the X - axis: Mark the categories (Trial 1, Trial 2, Trial 3, Trial 4, Average) with two bars per category (one for Tap Water, one for Soapy Water).
2. Label the Y - axis: Mark intervals (e.g., 0, 2, 4, 6, 8, 10, 12, 14) to represent the number of drops.
3. Draw Bars:

• For each trial/average, draw a bar for Tap Water (height = number of drops) and a bar for Soapy Water (height = number of drops). Use different colors or patterns to distinguish Tap Water and Soapy Water.

Example Visualization (Text - based Sketch)

Number of Drops
|
|                ▓▓▓▓▓▓▓▓▓▓▓▓▓▓  (Tap Water: 14)
|                ▓▓▓▓▓▓        (Soapy Water: 6)
|        ▓▓▓▓▓▓▓▓▓▓▓▓          (Tap Water: 11)
|        ▓▓▓▓▓▓▓▓▓▓▓▓  ▓▓▓▓▓▓▓▓ (Soapy Water: 9)
|                ▓▓▓▓▓▓▓▓▓▓▓▓  ▓▓▓▓▓▓▓▓ (Tap Water: 14; Soapy Water: 9)
|  ▓▓▓▓▓▓▓▓        ▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓ (Tap Water: 9; Soapy Water: 14)
|  ▓▓▓▓▓▓▓▓▓▓▓▓    ▓▓▓▓▓▓▓▓        (Tap Water: 12; Soapy Water: 9)
|_____________________________________________________
          Trial 1   Trial 2   Trial 3   Trial 4   Average

Key Labels

• X - axis Title: “Trial / Average”
• Y - axis Title: “Number of Drops”
• Legend: Label the two bar colors/patterns as “Tap Water” and “Soapy Water”.

This bar graph visually compares the number of water drops (tap vs. soapy) across trials and their averages, highlighting the effect of soap on surface tension (fewer drops with soapy water, indicating lower surface tension).