Later some non-science person thought that the gas floated to the top of the atmosphere to form a layer like the glass in a greenhouse. The popular view is that the atmosphere has some sort of layer of carbon dioxide up there that reflects heat back down to Earth rather than letting it escape to space.
The function of the human arm is to be able to reach objects with your hands.he function of the arm in the microscope is to support the tube  and connects it to the base. It is also use to transport the  microscope from place to place. 2 people found this useful. Edit.
Bones of the Human Arm The arm reaches from the shoulder to the wrist. It consists of two basic parts: (1) the upper arm, which extends between the shoulder and the elbow, and (2) the forearm, which extends between the elbow and the wrist. The upper arm is formed by one long bone, the humerus.keletal Muscles of the Human Arm Skeletal muscles are responsible for hundreds of movements. When an organism wants to move, signals travel from the brain to the skeletal muscle cells. The muscle cells then contract, or get shorter. Strands of tough connective tissue connect the skeletal muscles to bones.