Ecosystems
4th Grade Science · 6 lessons
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Lessons
- 1Food Webs and Feeding RelationshipsFood webs show the complex feeding relationships in an ecosystem. Unlike a simple food chain, a food web shows that most organisms eat more than one type of food.Lesson
- 2How Plants ReproducePlants reproduce through seeds or spores. Flowering plants produce seeds inside fruits, while conifers produce seeds in cones. Ferns and mosses reproduce using tiny spores.Experiment
- 3Surviving Winter by HibernatingHibernation is a deep sleep that helps animals survive winter when food is scarce. During hibernation, an animal's heart rate and breathing slow down to save energy.Lesson
- 4Predator and Prey BalancePredator-prey relationships help keep ecosystems balanced. When prey populations increase, predator populations grow too. When predators reduce prey numbers, predator populations then decline.Lesson
- 5Plant Structures and Their JobsPlants have specialized structures: roots anchor the plant and absorb water, stems transport materials, leaves capture sunlight, and flowers produce seeds for reproduction.Experiment
- 6Producers, Consumers, and DecomposersOrganisms in an ecosystem depend on each other. Producers make food, consumers eat other organisms, and decomposers break down dead material to recycle nutrients.Lesson
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