Describe what a machine is able to do:

A machine is able to make work easier by changing the force needed, directed, or force applied over a distance.

ask your friends for what they got then copy it down if you don't have any friends which is fine than google it or pay the teacher

the nitrogen cycle provides nitrogen to the ecosystem from the atmosphere, ground and oceans. nitrogen is an important component of complex molecules such as amino acids and nucleotides, which lead to the creation of proteins and dna, the building blocks of all life. plants absorb nitrogen in the form of ammonium, nitrate ion and, on rare occasions, as amino acids. animals receive nitrogen necessary for biological processes from feeding on living or dead organic matter.