Answered

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A scientist wants to know if humidity affects the growth of wax palm trees. Three wax palm trees are
kept at different humidity levels inside of a greenhouse for 12 weeks. One tree is left outside in
normal conditions. The height of the trees are measured once a week and recorded in a data table.
Which of the trees is the control group?
OA The tree left outside
OB. The trees in the greenhouse
OC. Both sets of trees will work as the control group
OD. A control group is not needed in this experiment
QUESTION 4
Maria wants to enter the science fair at her school. She has a list of ideas for her project. Which
questions could be answered through scientific investigation?

Sagot :

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