Nitrogen and oxygen are gases in the atmosphere.
trace
variable
primary
rare

The biome that includes evergreen trees is the forest biome.

Religious conflict in northern ireland started with a) cultural differences resulting from viking invasions around 800 b) england’s split from the catholic church in the 1500s c) rebellions in ireland between 1916 and 1921 d) the norman invasion of england in 1066

Find the slope of the line (6,4) and (3,2)