When setting up an experiment why is it necessary to have a control group

A control group in an experiment is a group separated from the rest of the experiment (for example, there is no use of treatment on that group). It is a group where the independent variable being tested cannot influence the results. There are two types of control groups: positive and negative.

Positive- the conditions of the experiment are set to give a positive result

Negative- the conditions of the experiment are set to give a negative outcome.

To have a group to compare to the experimental group

Explanation:

I took the test k12

me two

explanation:

because i hate it

the transfer for conduction is the heat transfering from the liquid to the spoon

the transfer for convection is the heat rising from the liquid to the air

the transfer for radiation is the heat going through the sides of the cup and to the air

at least that is what i would do