Why does Earth have day and night? A. Earth revolves around the sun
B. Earth rotates on its axis
C. The Moon revolves around the Earth
D. Earth revolves around the Moon

When creating a graph, the goes on the x axis and the goes on the y axis. a. dependent variable, independent variable b. experimental group, control group c. independent variable, dependent variable d. control group, experimental group

Which symbols below represent the ions found in the glass of water ? a. oh- and h+ b. co2 and o2 c. o2 and h2 d. nh3- and h+

Which muscle is responsible for inhalation ?