I'm really confused?

Question

For my science fair project im seeing what type of liquid stunts a plants growth the most. Im using 4 plants and the drinks im using are distilled water, mineral water, unsweetened iced tea, and salt water. The control is the distilled water. But I'm confused how I would write that in a paragraph. Would I say;

The control in my experiment is the distilled watered plant. It's this one because distilled water only has H2O and theres nothing added to it.

Is this good or what should I do??

Answer 1

I think you shouldnt say "Its this one because ..." as it doesnt soud scientific enough! maybe you should say something LIKE "The control in my experiment is distilled water. I chose to use this because distilled water has no impurities and is just H2O." that sounds a little bit better.

Hope this helps.

Answer 2

I would say, 'The control in my experiment is the distilled water. This is because its chemical composition is H2O while the salt water has added elements and impurities.' I would also use undistilled water, because distilled water has other chemicals in it. I know, because it is impossible to boil distilled water, which is only possible through added chemicals. Good luck!