From their experiences, they develop an understanding of the following concepts, skills, and attitudes. An ecosystem is a community of organisms and its interaction with its environment. Organisms in an ecosystem have dependent and interdependent relationships, which can be illustrated by food webs. Factors that affect growth and reproduction of organisms in an ecosystem include light, water, temperature, and soil. A pollutant is anything that can harm living organisms when too much of it is released into an ecosystem.
Pollution is the condition that results when pollutants interact with the environment.
Model ecosystems can be used to learn more about the complex relationships that exist on earth. Using a hand lens, pH paper, measuring devices, and other testing equipment appropriately. Conducting, recording, and organizing daily observations. Planning, implementing, and analyzing experiments and drawing conclusions from the results. Making and testing predictions.