8
QuizMultiple Choice

Experimental Design Principles

Question 8 • AISD-TX-Earth Systems A - Credit Recovery 2025-26

What is an example of a hypothesis leading to a new experiment?

Answer
A
Upon seeing bacteria under the microscope, scientists theorized that they could be the cause of illness.
B
Galileo dropped different balls off of the Leaning Tower of Pisa to explain how things with different weights fall at the same speed.
C
Galileo had the idea that objects of different weight will fall at the same speed. He tested this by dropping different balls off of the Leaning Tower of Pisa.
D
Upon seeing that bacteria caused illnesses, scientists developed the electron microscope to be able to see viruses.

Explanation

A hypothesis is a proposed explanation or prediction that can be tested. In choice C, Galileo first hypothesized that objects of different weights fall at the same speed, then tested that idea by dropping balls of different weights. Choice B describes the experiment but presents the idea as something the experiment was meant to explain, rather than showing the hypothesis leading to the experiment.

AI-written and checked against the verified answer.

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