A suggested and testable explanation for an event is called a __.
a. hypothesis
b. variable
c. theory
d. control
The Correct Answer and Explanation is :
The correct answer is:
a. hypothesis
Explanation:
A hypothesis is a suggested and testable explanation for an event, phenomenon, or observation. It is an essential part of the scientific method, which is used to explore and understand natural occurrences. A hypothesis is formulated based on previous knowledge, observations, or research, and it provides a possible answer to a scientific question.
For a hypothesis to be scientifically valid, it must meet two key criteria:
- Testability – It must be possible to test the hypothesis through experiments or observations.
- Falsifiability – It must be possible to prove the hypothesis wrong if it is incorrect.
Example:
Suppose a scientist observes that plants in sunlight grow taller than those in the shade. The scientist may formulate the following hypothesis:
“If a plant receives more sunlight, then it will grow taller.”
This hypothesis can be tested by setting up an experiment where some plants receive different amounts of sunlight, and their growth is measured over time.
Why the Other Options Are Incorrect:
- Variable (b): A variable is any factor in an experiment that can change. There are independent variables (which the scientist changes) and dependent variables (which are measured).
- Theory (c): A theory is a well-substantiated explanation based on extensive evidence and repeated testing, such as the Theory of Evolution. Theories are broader and more established than hypotheses.
- Control (d): A control is a standard for comparison in an experiment. It ensures that the results are due to the variable being tested and not other factors.
Thus, the correct answer remains hypothesis (a) because it is a testable explanation for an event.