One student rubs a balloon against his hair several times. Another student passes a comb through her hair several times. The stu
dents place the comb near the balloon and observe that the comb repels the balloon. Which is the most likely reason the comb can repel the balloon? A) The balloon has a positive charge and the comb is neutral.
B) The balloon and the comb have the same electrical charge.
C) The balloon has a negative charge and the comb is neutral.
D) The balloon and the comb have opposite electrical charges.
Eutrophication is the enrichment of a body of water with excessive nutrients (nitrogen and phosphorus), which causes algal growth and subsequent decline of dissolved oxygen after decomposition.
