Joshua was driving to a friend’s house to study. during his trip, he started on pavement. at one point, he hit an ice patch on the road, but then he returned to pavement. the road then turned into a gravel road. which best describes the frictional force of his trip? friction increased when he went from pavement to ice and then decreased two more times. friction decreased when he went from pavement to ice and then increased two more times. friction increased when he went from pavement to ice and then decreased one additional time. friction decreased when he went from pavement to ice and then increased one additional time.

Which enzymes break down carbohydrates?

Stephen is a student who wants to test his knowledge of medical terminology. which option could he use?

Juan and carol were studying invertebrates in biology. they knew that segmented or earth worms preferred a dark, moist habitat. during this lab, they would be investigating the responses of organisms called planaria or dugesia tigrina. these were simple flatworms that still had a one-way digestive system and a very simple nervous system. juan and carol placed the planaria in a petri dish containing cool, distilled water that was partially covered with black paper. they shined a light on the dish. next, they removed the paper and placed a small amount of chicken liver at one end of the dish. they added a few large salt crystals to the water. finally, they added drops of hot water to the cool water in the petri dish. their results can be seen in the data table. according to their experiment, all but one conclusion is valid.