an approximate time period

a chemical compound that is a mixture of chlorine and something else

very small blood vessels

when something is equal to something else

a statement of what will happen next.

a gas in the air that has no smell or taste, and that all animals need to breathe

a machine or company that prepares something and makes it ready for use

a person who holds a particular office or position

the usual amount

the flat, thin body parts of a fish that sticks out and helps guide it through water