Ateam of scientists is studying the fossils in the cross-section of rock shown below. between which two layer of fossils can secondary succession be observed? a) layers 1 and 2. b) layers 2 and 3. c) layers 3 and 4. d) layers 1 and 4.

Suppose that some of the compound spilled out of the crucible after it was heated. would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? briefly explain your answer.

Match each statement with the state of matter it describes

Ascientist wants to know how individual lions within a pride interact with each other in their own environment. to do this, the scientist sedates and tags all of the lions within a pride. then, he places several remotely-controlled video cameras near the lions' den and performs an observational field study. he collects continuous video footage over the span of one year, analyzes the video, and then forms conclusions based on his observations.