Answer:
1 factor deffer which is independent variable which is controled in control groups
Color is the least reliable
The answer is D
Consulting their chemistry teacher and other students in class would not be in depth enough, so A and B are not the answers.
While consulting a chemistry textbook will be useful, the scientific journal is not the best choice.
However, the chemistry textbook would be great, and the periodic table of elements os necessary if they are doing a study about it so the best answer would be D.
Hope this helps!
Plants , Animals , & Fungi . Hope this helps you !
starts with sunlight and photosynthesis if you are talking about plants
