Which event is part of a convection current in the air? A. Cool air sinks.
B. Cool air rises.
C. Warm air swirls.
D. Warm air sinks

How are elements arranged in a periodic table

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

Which of the following ocean acidification? are the most likely side effects of a ph less than 7.0 in the ocean b. more metal salts altering the ocean chemistry c. dissolution of the shells of marine organisms d. both a & b e. all of the above.