An independent variable is: A. Remain the same to make an experiment a fair test.
O B. Measured to show the effect of a change.
C. Collected to draw conclusions.
D. Changed to test a hypothesis.

Look at the figure above. which atmospheric layer has around 80 percent of the mass of the earth's atmosphere? (hint: it's where the clouds seen on earth are formed.) a. exosphere b. troposphere c. stratosphere d. thermosphere

Asnail, elodea (aquatic plant), or both were added to the tubes and they were stoppered. tubes were placed under a grow light for 24 hours and the results recorded. the test tubes were then covered for 24 hours to produce a dark environment and the results recorded. which statement best explains the change in test tube d from the light setup to the dark setup.

Plsss > .< compare and contrast the characteristics of flatworms rounds worms and earthworms