A is a system formed by the interaction of a community of organisms with
their physical environment
A. Biome
B. Ecosystem
C. Habitat
D. Campground

In which state was more than 100 billion tons of coal mined in 2005?

Several billion years ago which gas was the least prevailant in the atmosphere

Which statement about relative potential energy of electrons is correct? a. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 2 s orbital of the second electron shell. b. an electron in the 2 p orbital of the second electron shell has more potential energy than an electron in the 3 p orbital of the third electron shell. c. an electron in the 3 p orbital of the third electron shell has more potential energy than an electron in the 2 p orbital of the second electron shell.