Introduction to Experimentation
This worksheet introduces Grade 10 students to the fundamental concepts of experimentation, including variables, controls, hypotheses, and data analysis.
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Introduction to Experimentation
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Read each question carefully and provide your best answer based on your understanding of scientific experimentation.
1. In an experiment, which variable is intentionally changed by the researcher?
Dependent variable
Independent variable
Control variable
Extraneous variable
2. What is the purpose of a control group in an experiment?
To introduce bias
To provide a baseline for comparison
To manipulate the independent variable
To measure the dependent variable
3. A scientific is a testable explanation for an observation.
4. The results of an experiment are often displayed using or graphs.
5. A valid experiment must have only one independent variable.
True
False
6. Qualitative data involves numerical measurements.
True
False
7. Briefly explain the difference between a hypothesis and a theory.
8. Why is it important to repeat an experiment multiple times?
Consider the following experimental setup:
A student wants to test if the amount of sunlight affects the growth of bean plants. They set up three groups of bean plants. Group A receives 8 hours of sunlight daily, Group B receives 4 hours of sunlight daily, and Group C is kept in complete darkness. All groups receive the same amount of water and are grown in the same type of soil.
9. Identify the independent variable in this experiment.
10. Identify the dependent variable in this experiment.
11. What are some control variables in this experiment?