The younger layer of rock in the grand canyon are on top of the older layers. which of steno's principle best explains this

Explain how fossils scientists make discoveries about the lives of organisms and about how environments have changed over time. plz hurry up it time

In iceland, the mid atlantic ridge runs through the center of the contry. what can you conclude about the apperence of iceland many thousands of years from now?

Which of the following is the source of energy for photosynthesis? a.) glucose b.) chlorophyll c.) carbon dioxide d.) sunlight