Explain how a magnetic compass can be used to find directions on earth’s surface

Which nutrient tends to cycle within a single ecosystem?

Match each description with the correct form of energy. 1. energy of an object's position above the ground. 2. stored in the bonds of atoms and molecules 3. stored in the nucleus of an atom 4. energy of vibrating molecules 5. movement of objects used to do work 6. created by vibrations in electric and magnetic fields chemical energy mechanical energy heat gravitational energy light nuclear energy

Which part of the microscope controls the amount of light which shines through the lens?