The continents are made up of mostly what type of rock

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.

What is happening when the water inside a kettle heats up and begins to boil

What is produced from neutralization of an acid and a base? a. hydronium ions b. citric acid c. salt and water