Answer:
i think D
hope this helps
let me know if i'm wrong i will change the answer
Explanation:
PLEASE HELP 5TH GRADE SCIENCE!
Charlotte completed an experiment in which she investigated and discovered that an electrically charged object can attract an uncharged object without any contact. She used a PVC pipe and small pieces of paper for her experiment. Each time, she rubbed the PVC pipe with a cloth to give it a charge and then held it over paper. What would be Charlotte's control group in this experiment?
A. Using the cloth and rubbing it against the PVC pipe
B. Taking the pieces of paper and rubbing it against the cloth
C. Not rubbing the cloth against the PVC pipe or the paper
D. Rubbing the cloth against both the paper and the PVC pipe
Answer:
Your Best Answer would be C
Hope this helps :)
Charlotte's control group in this experiment would be: not rubbing the cloth against the PVC pipe or the paper. Option (c) is correct.
What is control group in the experiment?In a scientific experiment, a control group is a subset of participants who are not included in the main experiment and whose outcomes are unaffected by the independent variable under study. By isolating the effects of the independent variable on the experiment, this can help rule out other possible explanations for the findings of the experiment.
Positive and negative control groups are the other two categories into which they might be divided.
Not all scientific studies call for the use of control groups. The use of controls is crucial when an experimental conditions are complex and difficult to isolate.
Learn more about control group, refer the link:
https://brainly.com/question/14256044
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A change that produces one or more new substances is called _____.
sublimation
a physical change
a chemical change
evaporation
Answer:
A change that produces one or more new substances is called
a chemical change.