Which element is NOT one of the most abundant elements in seawater? A. Calcium
B. Iron
C. Sodium
D. Chlorine

Which phrases describe oxygen's roles in earth’s atmosphere? check all that apply. allows fuels to burn forms clouds that produce rain is the gas that animals breathe is used by plants to produce food forms ozone that absorbs the sun's harmful rays

According to the theory of continental drift, what was the priginal state of the worlds continents

Plz explain the purpose of the city beautiful movement and how it began. (site 1)