Ecosystem components and energy flow are the focus of this Grade 7 Science resource for the Ontario topic Interactions in the Environment. Students examine how biotic and abiotic factors shape habitats, how producers, consumers, and decomposers function, and how energy moves through trophic categories.

Biotic, Abiotic, and Habitat Connections

The reading passage introduces the living and nonliving parts of an ecosystem and connects them to habitat structure and species survival. Students work with specific examples of abiotic factors such as sunlight, water, air, temperature, soil, and minerals, while identifying organisms as biotic components. The lesson shows how changes in resources and habitat structure can influence which species become more common over time.

Following Energy Through an Ecosystem

Students explore producers such as grasses and pond algae, consumers that obtain energy by eating other organisms, and decomposers that break down dead organisms and waste. Pond and forest examples provide concrete food-chain contexts, including algae, zooplankton, small fish, trees, herbivores, predators, fungi, and bacteria. The resource connects photosynthesis, food chains, trophic levels, nutrient return, and resource availability to ecosystem balance.

Reading, Reasoning, and Application

This ecosystem science worksheet combines a reading passage with multiple-choice questions, true-or-false statements, short-answer responses, matching questions, a cloze passage, an extended-response essay, and a Did You Know section. Students identify abiotic components, distinguish consumers from decomposers, construct a simple pond food chain, explain energy-flow relationships, and apply biotic and abiotic concepts to a pond or forest habitat.

Included Teacher Support

• ✔️ Student worksheet focused on ecosystem components and energy flow
• ✔️ Separate PDF answer key for checking student work
• ✔️ Student Notes & Lesson Summary supplement for reinforcing key concepts
• ✔️ Separate Teacher Guide with Learning Objectives, Teaching Tips, Discussion Questions, and Common Mistakes

Use this Grade 7 ecosystem worksheet for classroom instruction, reading-based science practice, independent work, review, or extended-response assessment. The combination of habitat examples and trophic relationships gives students opportunities to connect vocabulary with ecological situations and explain how changes in food, shelter, and other resources can affect an ecosystem over time.