Answer:
true. I think
Explanation:
A chemical formula shows the atoms a molecule is made of.
The rover was designed to explore A.Mars
Answer:
It is mentioned that the student is mixing chemicals A and B and observes the time taken for the color to change. However, in the experiment, it is noticed that the student has repeated the procedure five times and each time he or she is modifying the concentration of chemical B. Thus, it is clear that the concentration of chemical B is the independent variable in the experiment. An independent variable is illustrated as the variable, which is controlled or modified in the experiment.
I believe it is b. you only want to change one thing at a time so you know which one thing caused the effect
Because Electrons have a negative charge
