Sea anemones stay in one place, using tentacles to catch small animals that drift through the water. Many animals pursue prey. For example, sharks swim after fish. To survive, animals must balance the energy used when catching food with the energy gained when eating what is caught. For example, if a shark swam very fast and caught only a small amount of food, it would eventually starve.
Most animals move slowly to conserve energy until they are close enough to catch food.
Action Seat all but one student in a circle. Place the one student in the middle of the circle. This student will be the bubble maker. Introduce the terms predator and prey. Students will be predators, bubbles will be prey.