Which of the following "spheres" is not involved in the water cycle?
a. biosphere
b. exosphere
c. atmosphere
d. hydrosphere

This chart lists four kinds of polymers and their sources. what can be known about all four polymers, despite their differences? they come from living things. they share ionic carbon bonds. they are at least 100 monomers long. they are made of repeating subunits.

Stage in which a star’s outer layers have started to cool and grow outward?

A1.5l container holds p.50 grams of an unknown gas at a pressure of 0.44 atm and a temperature of 50.c what is the molar mass of the unknown gas