scientific method story worksheet.pdf - Name: Samuel Capers Period ... - Free Printable

Problem Description:

The task involves designing an experiment to test the hypothesis that plants grow better in sunlight than in shade. The worksheet asks for specific details about the experimental setup, including variables, controls, and expected outcomes.

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Solution:

#### 1. What is your independent variable?
- Independent Variable: The factor that you manipulate or change in the experiment.
- Answer: The amount of sunlight the plants receive (sunlight vs. shade).

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#### 2. What is your dependent variable?
- Dependent Variable: The factor that you measure to see how it responds to changes in the independent variable.
- Answer: The growth of the plants (e.g., height, leaf size, overall health).

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#### 3. What are your constants (controls)?
- Constants/Controls: Factors that remain unchanged throughout the experiment to ensure a fair comparison.
- Answer:
- Type of plant used (same species and age).
- Amount of water given to each plant.
- Soil type and quality.
- Temperature and humidity levels.
- Amount of fertilizer applied (if any).
- Size of the pots.

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#### 4. How will you measure your results?
- Measurement Method: Specific ways to quantify the dependent variable.
- Answer:
- Measure the height of the plants using a ruler or measuring tape.
- Count the number of leaves on each plant.
- Assess the overall health of the plants by observing factors such as leaf color, wilting, or disease.
- Optionally, weigh the plants to compare their biomass.

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#### 5. What do you predict will happen?
- Prediction/Hypothesis: A statement about the expected outcome based on prior knowledge.
- Answer: Plants grown in sunlight will grow taller, have larger leaves, and appear healthier compared to plants grown in shade.

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#### 6. Can you think of anything else that might affect your results?
- Potential Confounding Variables: Other factors that could influence the outcome if not controlled.
- Answer:
- Differences in natural light intensity or duration between the two locations (e.g., one area may receive more indirect sunlight).
- Variations in soil moisture due to evaporation rates in sunlight versus shade.
- Presence of pests or diseases that might affect one group more than the other.
- Differences in air circulation between the two environments.
- Shadows cast by nearby objects that might partially block sunlight.

To minimize these effects:
- Ensure both groups receive the same amount of water.
- Monitor and maintain consistent soil moisture levels.
- Place both groups in similar environmental conditions (e.g., same room temperature and humidity).
- Use identical pots and soil for all plants.
- Keep the plants at a similar distance from any potential light sources or shadows.

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Final Answer:

1. Independent Variable: Amount of sunlight (sunlight vs. shade).
2. Dependent Variable: Growth of the plants (height, leaf size, overall health).
3. Constants/Controls: Plant type, water amount, soil type, temperature, humidity, fertilizer, pot size.
4. Measurement Method: Measure height, count leaves, assess health, and optionally weigh the plants.
5. Prediction: Plants in sunlight will grow taller, have larger leaves, and appear healthier.
6. Potential Confounding Variables: Light intensity, soil moisture, pests, air circulation, shadows.

Boxed Final Answer:
\[
\boxed{
\text{1. Amount of sunlight (sunlight vs. shade)} \\
\text{2. Growth of the plants (height, leaf size, overall health)} \\
\text{3. Plant type, water amount, soil type, temperature, humidity, fertilizer, pot size} \\
\text{4. Measure height, count leaves, assess health, and optionally weigh the plants} \\
\text{5. Plants in sunlight will grow taller, have larger leaves, and appear healthier} \\
\text{6. Light intensity, soil moisture, pests, air circulation, shadows}
}
\]