Life on Earth is a vast jigsaw of plant and animal activity. The world can be split into vegetation regions according to the kind of plants that thrive there. Scientists often break down the vegetation regions into smaller units, such as tropical rainforests or freshwater lakes. They might go further to identify individual trees or a pond. Each unit, where the creatures living there interact with each other, is called an ecosystem.
An ecosystem is a community of living things, or organisms, that all depend on each other. An aquarium like the one in the project is a miniature freshwater ecosystem. All plants need particular conditions of soil and climate to survive. Animals also survive by adapting to, and interacting with, their surroundings and the local climate.
Gravel, net, plastic bowl, pitcher, water, aquarium tank, rocks and pieces of wood, water plants, pond water, water animals.