Which of the following describes an experimental investigation?
A study conducted which involves a scientist looking at something that is known and comparing it to something else. The scientist collects data about how the items are similar and how they are different.
A study conducted which involves testing an observation. The scientist changes multiple things during the test. These are the controlled variables. Some kind of data is collected and connected back to the observation.
A study conducted which involves making observations of the natural world in the wild. The scientists is an observer only and does not manipulate or change anything.
A study conducted which involves testing a hypothesis. The scientist manipulates one thing during the test, which is the test (independent) variable. Some kind of data is collected and connected back to the hypothesis.
Which of the following describes an experimental investigation?
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The correct answer is: A study conducted which involves testing a hypothesis. The scientist manipulates one thing during the test, which is the test (independent) variable. Some kind of data is collected and connected back to the hypothesis.
Explanation: An experimental investigation specifically focuses on testing a hypothesis by manipulating one independent variable while keeping other factors constant (controlled variables). This allows the scientist to observe the effects of the manipulation and collect data to draw conclusions about the hypothesis being tested.