Identify a line segment in which the average kinetic energy is increasing

The tilt of the earth's axis of rotation is responsible for the a) ocean's tides. b) size of the moon. c) brightness of stars. d) earth’s seasons.

Chen drew a diagram to compare the ways in which different organisms obtain nitrogen. which label belongs to the area marked z?

Which element is the least metallic between cadmium, silver, zinc, or iron?