Steven keeps two aloe vera plants on his windowsill. Both plants have begun to rot where the leaves meet the soil.

Steven hypothesizes that he is watering them too much. He sets up an experiment in which he will water one plant less than the other. Why should the plants receive the same amount of sunlight during the experiment?

There is an orange sitting on your teacher's desk. Which conclusion can you make just by looking at the orange?

Ernie's new cat slept on Ernie's bed all day Monday. When Ernie got in bed on Monday night, he started sneezing, even though he had not had this problem on previous nights. He sneezed all night, and in the morning he thought about what might have changed, and then he washed his sheets. Tuesday evening, Ernie did not sneeze once in bed. Based on the given information, what is a reasonable conclusion to draw?