Which of the following refers to the apparent daily movement of objects in the sky, due to the rotation and orbit of the Earth.
a)nocturnal motion
b) diurnal motion
c) sidereal motion
d) Canalemmic motion

Which of the following substances is not involved in the chemical reaction that pro- duces smog? a. sunlight b. particulate matter c. automotive exhaust d. ozone

Which of the following is a common danger of commercial fishing?

Astudent wants to test the hypothesis that fertilizer improves the growth rate of grass seeds. to test this hypothesis, the student put the same amount of grass seed in 3 containers with the same type of soil. the student measured the growth at the end of the week. all plants received equal amounts of water and sunlight. if you were asked to graph this data, what would you place on the x-axis? a. fertilizer b. water c. plant growth d. week one