In an aerosol can used for spray paint, a highly compressed "propellant" move the liquid into a "dip tube" so that it can be sprayed out. the valve through which the liquid sprays is usually closed, but when it is pressed down, it opens and allows material to pass through.

"The propellant gas wants to expand as much as it can, so if the valve is open, the propellant expands and pushes the spray up out of the can making more room for itself to expand"

carbohydrates: (starches and sugars) composed of carbon, hydrogen, and oxygen.

lipids: (fats, oils, and waxes) are made of carbon and hydrogen atoms.

nucleic acids: contain hydrogen, oxygen, nitrogen, carbon, and phosphorus. they are polymers of nucleotides. a nucleotide has three parts, a 5-carbon sugar, a phosphate     (-po⬇️4) group, and a nitrogenous base.

proteins: made up of nitrogen, carbon, hydrogen, and oxygen. they are polymers of amino acids.

feral cats are estimated to eat tens of millions of native animals each night in australia