In an experiment, the independent variable . (WILL MAKE BRAINLIEST) A.
always influences the dependent variable
B.
is the same for all groups in an experiment
C.
is influenced by the dependent variable
D.
is manipulated or varied by researchers

Thanks to anyone who helps! :)

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

Which of the following observations indicates that there is a small, dense, positively charged part in the center of an atom? some uncharged particles are scattered by a gold foil. all uncharged particles are attracted towards a gold foil. all positively charged particles pass straight through a gold foil. some positively charged particles bounce back from a gold foil.

Which element is the least metallic between cadmium, silver, zinc, or iron?