a. controls help scientists form hypotheses
b. controls answer questions
c. controls show that the results of an experiment are caused by changing the variable
d. controls are a way to collect data.
need to know at what percent do you think you are right
2006-09-19 11:30:57 · 4 answers · asked by demi1996 2 in Science & Mathematics ➔ Biology
C. Controls keep all variables in the experiment constant except the variable you are testing. 100%
2006-09-23 02:46:12 · answer #1 · answered by ATP-Man 7 · 0⤊ 0⤋
It is C
This is because the only difference between the control and experimental test and the control test is one variable. This means that any different results can be attributed to the changed variable.
2006-09-19 11:42:52 · answer #2 · answered by Niels B 2 · 1⤊ 0⤋
Hi. C. (Oh wait, that's a drink!)
2006-09-19 11:33:02 · answer #3 · answered by Cirric 7 · 0⤊ 0⤋
c
2006-09-19 11:38:41 · answer #4 · answered by emjay 5 · 0⤊ 0⤋