The atmosphere is primarily made of what gas? Carbon Dioxide
Nitrogen
Oxygen
Argon​

(apex) when a cup of water is dropped, as the cup falls, the water in the cup falls out true or false?

Select each correct answer. more than one answer may be correct. which of the following is a characteristic of unicellular organisms? they can possess tissues and organs. all of their functions are performed by a single cell. they are usually microscopic. each of their cells is specialized to perform a specific function.

Describe the difference between a. a hypothesis and a theory and b. an observation and an experiment.