The troposphere is hotter near the Earth's surface because heat from the Earth warms this air. As the altitude increases the number of air molecules decreases, the average of their kinetic energy decreases.
Does this help?
if it does please mark me brainliest! thanks:)
Answer:
Diaphragm
Explanation:
This is also referred to as the iris.it is located under the stage of the microscope. It's main role is to control the quantity of light that gets to the specimen. The diaphragm is adjustable. Each if the 5 holes in the disc have varying diameter. And it is helpful for adjusting contrast and resolution as regarding the specimen