Solid sulfur dioxide, so₂(s)
choose from the following
(a) an ionic solid
(b) a metallic solid
(c) a molecular solid containing nonpolar molecules
(d) a covalent network solid
(e) a molecular solid containing polar molecules

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.

Which process does not require the presence of a physical substance in order to transfer heat? air in the atmosphere is heated by the ground. this warm air then rises, and cooler air falls. this is an example of what type of process? how is conduction different from radiation?

Describe at least two advantages and two disadvantages of using hydropower as a source of energy.