Sam demonstrated the formation of a type of rock. he stacked layers of cake, frosting, and jam and then squeezed the stack. the different layers came together after squeezing. the formation of which type of rock did sam demonstrate?

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

Vaccines are weakened forms of disease causing microorganisms, which are given to patients to prevent disease. after the vaccine is administered, the immune system responds by creating a(n) to recognize the a.) antibody, antibiotic b.) antigen, antibody c.)antibiotic, antibody d.)antibody, antigen

How energy move through ecosystem ?