How much variables shoulld be changed?

Answer 1

i am not clear on what you are asking

Answer 2

How much variable should be changed in a experiment?

Answer 3

1 because for example if you change 2 at the same time you won't know which one helped. for example you make this cake and you want it to taste better so you put sugar and more chocoalte at the same time. It tasted better but now you don't know which one helped. If you would have put in sugar first and it still tasted bad then you put the chocolate you know that the chocolate helped it taste better

Answer 4

wow that helped me too. i learned something! :)

Answer 5

You're welcome.:D