Variables and Experiments Worksheet

Name:

Date:

🔬 Part 1: Understanding Variables and Data Types

1. Match each term with its correct definition:

Independent Variable: ________________________

Dependent Variable: ________________________

Control Variable: ________________________

Word Bank: What you measure or observe | What you keep the same | What you change on purpose

2. What type of data is each example? Circle your answer.

a) Plant height: 15 inches Quantitative / Qualitative

b) Leaf color: bright green Quantitative / Qualitative

c) Temperature: 72°F Quantitative / Qualitative

d) Texture: rough and bumpy Quantitative / Qualitative

3. A student wants to test if different types of music affect how fast plants grow. What would be the:

Independent Variable: _________________________________

Dependent Variable: _________________________________

One Control Variable: _________________________________

🧪 Part 2: Analyzing Experiment Scenarios

4. Read this scenario and answer the questions:

Maria tests whether adding salt to water changes how long it takes ice cubes to melt. She uses three cups: one with plain water, one with 1 tablespoon of salt, and one with 2 tablespoons of salt. She measures the melting time in minutes and observes the appearance of the water.

a) What is the independent variable?

Type of ice cubes

Amount of salt in water

Temperature of the room

Size of the cups

b) What data will be quantitative? Check all that apply:

Melting time in minutes

Amount of salt (tablespoons)

Appearance of water

Number of ice cubes used

5. Design your own simple experiment! Choose one question to investigate:

Does the color of light affect plant growth?

Do different brands of paper towels absorb the same amount of water?

Does the temperature of water affect how fast sugar dissolves?

For your chosen experiment, identify:

Independent Variable: _________________________________

Dependent Variable: _________________________________

Two Control Variables: _________________________________ and _________________________________

✏️ Part 3: Experiment Design

6. Describe the steps of your experiment from Question 5. How would you make it a fair test?

7. What data would you collect? List one example of quantitative data and one example of qualitative data you might observe.

Quantitative Data: _________________________________

Qualitative Data: _________________________________

8. Why is it important to keep control variables the same in an experiment?

Variables and Experiments Worksheet

Variables and Experiments Worksheet

🔬 Part 1: Understanding Variables and Data Types

🧪 Part 2: Analyzing Experiment Scenarios

✏️ Part 3: Experiment Design

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