Population Changes

Students continue the population study of daphnia, estimating, predicting, and recording population changes. Students discuss factors that affect populations, including availability of food and space. Students also do a simple experiment to determine the type of food preferred by daphnia.

Student Resources

Learn by Reading

For additional content-area reading, check out the Houghton Mifflin Science eBook: Grade 3, Unit B, pages 50–53.