The scientific method begins with a scientific question. This question should lead to one or more testable hypotheses. Which of the following is a scientific
question that could lead to a testable hypothesis?

A. Are the birds that use the birdbath prettier in the summer or in the
winter?
B. Should people be required to maintain birdbaths?
C. Why do people want to maintain birdbaths?
D. How do temperature and humidity affect the rate of evaporation of
water?

rising temperatures because when water vapor in the air is cooled, it condenses. it turns back into a liquid and attaches to dust particles in the air. these very small water droplets group together to form clouds

i won't lie i don't know so go online and ask google thats what i do

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.