Introduction to Independent and Dependent Variables -Voxco - Free Printable

The image illustrates the concept of independent and dependent variables in a scientific experiment, using a plant growth scenario.

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🔍 Understanding the Variables:

#### ✔ Independent Variable (What you change):
- Definition: The variable that is deliberately changed or manipulated by the experimenter.
- In this case: Amount of water given to the plants.
- This is shown by the water droplets above the pots on the left side.
- You might give different amounts of water (e.g., 10 mL, 20 mL, 30 mL) to different plants.

#### ✔ Dependent Variable (What you measure):
- Definition: The outcome or result that is observed and measured. It depends on the independent variable.
- In this case:
- Size of the plant
- Number of leaves
- Whether the plant is living or dead
- These are shown on the right side with varying plant sizes and leaf counts.

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🌱 Example Scenario:

Imagine an experiment where you test how different amounts of water affect plant growth.

| Plant | Water Given (ml) | Size | Leaves | Status |
|-------|------------------|------|--------|--------|
| A | 10 | Small | 2 | Alive |
| B | 20 | Medium | 4 | Alive |
| C | 30 | Large | 6 | Alive |
| D | 0 | Dead | 0 | Dead |

- Independent variable: Amount of water → you *choose* how much to give.
- Dependent variables: Size, number of leaves, and survival → these *change based on* the water amount.

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✔ Summary:

- Independent Variable: Amount of water → you control it.
- Dependent Variables: Size, number of leaves, and whether the plant lives or dies → these respond to changes in water.

This setup helps scientists determine cause-and-effect relationships: Does more water cause bigger plants?

✔ Answer:
> The independent variable is the amount of water, and the dependent variables are the size of the plant, number of leaves, and whether the plant is living or dead. These outcomes depend on how much water the plant receives.