Unplanned environmental variations that may impact the experimenter's demonstration of experimental control are called variables.

Unplanned environmental variations that may impact the experimenter's demonstration of experimental control are called Extraneous  variables.

Further Explaination:  

Extraneous variables:

Extraneous variables are any variables that you are not deliberately concentrating in your analysis or test. When you run an investigation, you're hoping to check whether one autonomous variable affects another reliant variable, These bothersome variables are called extraneous variables.

Types of extraneous variables:

There are four types of extraneous variables:

Situational variables:

Situational Variables are factors in the condition that can accidentally influence the consequences of an examination. Such factors incorporate commotion, temperature, scents, and lighting. For instance, suppose specialists are researching the impacts of caffeine on state of mind.

Participant variables :

Participant variables are the contrasting individual attributes of members in a test. Participant variables  can be viewed as unessential factors since they are factors that can impact the consequences of an investigation however that the experimenter isn't contemplating.

Experimenter variable:

The free factor is the variable the experimenter changes or controls and is expected to directly affect the reliant variable. In a test, the specialist is searching for the conceivable impact on the reliant variable that may be brought about by changing the autonomous variable.

Demand characteristics:

Demand attributes alludes to an exploratory ancient rarity where members structure an understanding of the examination's motivation and unknowingly change their conduct to fit that translation.

Subject: social studies

Level: High School

Keywords: Extraneous variables, Types of extraneous variables, Situational variables, Participant variables, Experimenter variable, Demand characteristics.

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