Problem: Two groups of students learned about protozoa for a school project. Group P studied more about predatory protozoa, while group G studied about grazing and parasitic protozoa, plus portozoa as food sources. Which group learned more about protozoa that graze on algae?

A: group G

Problem: The Jones family had a history of chronic viral infections. Jenny got human papillomavirus, while her brother Josh got infected with the EpsteinBarr virus. They were both under treatment. Which sibling had a higher risk of developing cervical cancer?

A: Jenny

Problem: David was studying the processes involved in a machine. He collected a simple machine. He tagged it as case A. To compare it with compound machines, he collected two compound machines, case B and case C. Case B is a compound machine with few simple machines. And, case C is a compound machine with many simple machines. Which machine would change the force applied to it more, case B or case C?

A: case C

Problem: Matt is preparing food for a dinner party in his kitchen. His guests will be arriving shortly, so he fills up a pitcher with some water and puts it in the freezer to cool it down. He then takes a solid block of ice out of his freezer that he is planning to carve into a sculpture of some kind. Before he can start sculpting, there is a knock on his door that he must answer. Would the water or the ice require more energy to transform into a gas?

A:
ice