Question

Ch correct answer.

Question
1. Which of the following are factors that
can change or be changed within an
experiment?
2. Which type of variable is purposely
manipulated or changed in an
experiment?
3. Which type of variable must be kept
constant and unchanged throughout an
experiment so that the results are valid?

Answer 1

1- a variable

2- independent variable

3- control variable

Step-by-step explanation:

I hope this helps i took biology last year im a junior now so