1001 Space Earth Nature Evolution Fossils and Prehistoric Life Dinosaurs Simple Animals Insects and Spiders Fish Amphibians Reptiles Birds Sea Mammals Land Mammals Plant Kingdom How Plants Live Unusual Plants Ecology Conservation Animal Behaviour Pets and Farm Animals History Human World Science and Technology	Ecology How is the soil aerated? What is an ecosystem? What is a parasite? What is a herbivore? Why are some insects called pests? What is the water cycle? What is a food chain? Why do turtles lay so many eggs? What is a carnivore? What is a species? What is an omnivore? What is ecology? What is a habitat?   Previous: Back to Ecology Book: 1001 Section: Nature Chapter: Ecology