Plant Experiments

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Words to Know: Plant Growth Experiment

Hypothesis
A smart guess about what you think will happen. Example: “If I give one plant more water, it will grow taller.”
Variable
Something you change in an experiment. Example: amount of water, light, or temperature.
Control
The plant that gets regular conditions (like normal light and water) so you can compare it to the others.
Data
The information you collect—like height, color, or number of leaves.
Observation
What you see, smell, or measure about your plants during the experiment.
Photosynthesis
The process where plants use sunlight, water, and air to make their own food and grow.
Germination
When a seed starts to grow and sprouts into a tiny plant.
Environment
Everything around the plant—like light, air, water, and temperature.
Conclusion
What you learn at the end of the experiment. Did your results match your hypothesis?
Replication
Doing the same test more than once to make sure your results are reliable.

Steps in a science investigation

I. Purpose: Why is the lab or study being performed? Often a study is done because of a chance observation- see Galileo and the pendulum.

II. Hypothesis- What you think will happen?

III. Variables: List:

- Independent or manipulated variables (ones you’re changing)
- Dependent/responding variables (ones you’re measuring)
- Constants (what is kept the same)

IV. MATERIALS: List all materials used ( can include software)

V. PROCEDURE: List and number each of the steps in the order you did them. Scientific studies must be reproducible, so accurate descriptions of materials and methods are important.

VI. DATA TABLES & GRAPHS: Data Tables and/or Graphs may be attached to the back of your lab report.

All Data Tables and/or Graphs must have a Title.

Data tables should be neat, with units and values marked.

VII. CONCLUSION:

The conclusion will include a summary of your data with the exact numbers and will show that the hypothesis is supported or not supported.

For example, in the present pandemic, many people who are hospitalized and/or die are found to be covid positive, although their symptoms and cause of death are not primarily covid-related. How should their morbidities be classified?