Spongebob Controls Variables | PDF - Free Printable

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Let’s go through both experiments step by step and answer each question clearly.

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Experiment 1: Squidward's Jellyfish Experiment

Scenario:
Squidward loves playing his clarinet and believes it attracts more jellyfish than just playing instruments. He tested this by playing the clarinet for 5 minutes and counted the number of jellyfish he saw. He repeated the experiment using a flute and a guitar. The results are shown in a chart (not visible here, but we’ll infer from the questions).

#### Questions & Answers:

1. What is the manipulated variable?
👉 The manipulated variable (also called independent variable) is what the experimenter changes intentionally.
In this case, Squidward changed the type of instrument played (clarinet, flute, guitar).
✔ Answer: The type of instrument played.

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2. What is the responding variable?
👉 The responding variable (dependent variable) is what is measured or observed as a result of the manipulation.
Here, Squidward counted the number of jellyfish attracted.
✔ Answer: The number of jellyfish attracted.

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3. What should Squidward’s conclusion be?
We need to look at the data (which isn’t visible), but assuming the chart shows that more jellyfish came when he played the clarinet than the other instruments:

✔ Conclusion: Playing the clarinet attracted more jellyfish than playing the flute or guitar. Therefore, Squidward’s hypothesis may be supported.

But since the actual numbers aren’t visible, we can only say:
➡️ Based on the data, if the clarinet consistently attracted more jellyfish, then the clarinet attracts more jellyfish than other instruments, supporting his hypothesis.

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4. Are the results reliable? Why or why not?
Reliability depends on whether the experiment was controlled properly and repeated enough times.

Potential issues:
- Only one trial per instrument? (If so, not reliable.)
- Were conditions consistent (time of day, location, weather)?
- Was the sample size large enough?

✘ Likely unreliable because:
- Only one trial per instrument might not be enough.
- No control group (e.g., no music).
- No mention of randomization or repetition.

✔ Answer: The results may not be reliable because there were likely too few trials, no control condition, and possible confounding variables (like time of day or location). More repetitions and controls would improve reliability.

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Experiment 2: Patrick and SpongeBob’s Bubble Solution Test

Scenario:
Patrick claims Super Bubble Soap makes bigger bubbles than regular soap. They made two solutions:
- One: 5 oz. Super Bubble Soap + 5 oz. water
- Two: 5 oz. Regular Soap + 5 oz. water

They used the same wand and tested bubble size.

| Diameter of bubbles (cm) | Super Bubble | Regular |
|--------------------------|--------------|---------|
| Trial 1 | 10 | 10 |
| Trial 2 | 12 | 11 |
| Trial 3 | 18 | 14 |
| Trial 4 | 9 | 12 |
| Trial 5 | 13 | 12 |

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#### Questions & Answers:

1. What is the manipulated variable?
👉 The type of soap used: Super Bubble Soap vs. Regular Soap
✔ Answer: Type of soap (Super Bubble or Regular)

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2. What is the responding variable?
👉 The diameter of the bubbles produced
✔ Answer: Diameter of bubbles (in cm)

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3. Look at the results in the chart. Calculate the average diameter for each bubble solution.

Let’s compute the averages:

Super Bubble Soap:
- Trials: 10, 12, 18, 9, 13
- Sum = 10 + 12 + 18 + 9 + 13 = 62
- Average = 62 ÷ 5 = 12.4 cm

Regular Soap:
- Trials: 10, 11, 14, 12, 12
- Sum = 10 + 11 + 14 + 12 + 12 = 59
- Average = 59 ÷ 5 = 11.8 cm

✔ Answer:
- Super Bubble Soap: 12.4 cm
- Regular Soap: 11.8 cm

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4. What should their conclusion be?
Since the average bubble diameter is larger with Super Bubble Soap (12.4 cm > 11.8 cm), they should conclude:

✔ Conclusion: Super Bubble Soap produces slightly larger bubbles than regular soap, supporting Patrick’s claim.

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5. Are the results reliable? Why or why not?
Let’s evaluate:

✔️ Strengths:
- Same wand used
- Same amount of soap and water
- Multiple trials (5)
- Controlled environment

✘ Weaknesses:
- Small sample size (only 5 trials)
- Possible human error in measuring
- Not mentioned if all trials were done under identical conditions (e.g., temperature, humidity)

✔ Answer: The results are somewhat reliable because multiple trials were conducted and variables were controlled. However, more trials or replication would increase reliability.

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✔ Final Summary Table:

| Question | Answer |
|--------|--------|
| Exp 1 – Manipulated Variable | Type of instrument played |
| Exp 1 – Responding Variable | Number of jellyfish attracted |
| Exp 1 – Conclusion | Clarinet attracted more jellyfish → supports hypothesis |
| Exp 1 – Reliable? | Probably not — lack of repetition, controls |
| Exp 2 – Manipulated Variable | Type of soap (Super Bubble vs. Regular) |
| Exp 2 – Responding Variable | Diameter of bubbles |
| Exp 2 – Averages | Super: 12.4 cm, Regular: 11.8 cm |
| Exp 2 – Conclusion | Super Bubble Soap makes larger bubbles |
| Exp 2 – Reliable? | Somewhat reliable; good controls but limited trials |

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Let me know if you'd like this formatted as a printable answer sheet or if you want to include the chart data!