Solving a biological problem

Class 9 · Biology · 5 questions

Name: ____________________ Date: ____________

A testable explanation for an observation is called a:
- A Hypothesis
- B Theory
- C Law
- D Conclusion
In an experiment, the factor that is deliberately changed is the:
- A Dependent variable
- B Control
- C Independent variable
- D Constant
A control group is used to:
- A Compare with the group being tested
- B Avoid recording data
- C Change the hypothesis
- D Increase the result
Which step comes first in the scientific method?
- A Publishing the result
- B Recognising a problem
- C Writing the conclusion
- D Analysing data
A theory differs from a hypothesis because a theory:
- A Cannot be changed ever
- B Is only about animals
- C Has been supported by a lot of evidence
- D Is a guess

Answer key

1. A, 2. C, 3. A, 4. B, 5. C

A hypothesis is a proposed explanation that can be tested by experiment.
The independent variable is the one the experimenter changes.
The control group does not receive the treatment and gives a baseline for comparison.
The method begins with noticing a problem or asking a question.
A theory is a well supported explanation backed by many tests.