In an atom, the first energy level can hold electrons. The second energy level can hold
electrons. The third energy level can hold
electrons.

Match term definition ellipse a) diagonal cross section of a cylinder circle b) diagonal cross section through the widest part of a sphere sphere c) cross section parallel to the base of a cone great circle d) shape created when a semi-circle is rotated around the y-axis triangle e) perpendicular cross section of a cone

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains

What produces wave a)sound b) heats c)transfer of energy d)vibrations