Energy Flow System Models and Conservation is a Grade 7 science resource focused on energy flow, system models, energy conservation, and conversion efficiency. Students use energy flow diagrams and Sankey-style arrows to examine how energy enters a system, produces useful outputs, and leaves as waste heat.

Model Energy in Real Systems

The resource develops practical energy-accounting skills by asking students to interpret system models and describe how energy inputs, outputs, losses, and useful energy relate to conservation of energy. Students also explore major sources of energy loss and how conversion efficiency can be determined from an energy flow.

Model vocabulary is reinforced throughout, including input, output, loss, energy flow, and conversion efficiency. Students interpret and complete system-model statements while applying these ideas to mechanical and industrial systems.

Practice That Checks Different Levels of Understanding

Students encounter multiple-choice questions, true/false statements, short-answer responses, a reading passage, matching, a cloze passage, an essay, and a “Did You Know?” activity. This combination moves beyond simple recall by giving students opportunities to interpret models, apply energy-accounting ideas, explain system behavior, and communicate their reasoning.

Included Teacher and Student Support

• Student Notes & Lesson Summary supplement for lesson support and review
• Separate Teacher Guide PDF with Learning Objectives, Teaching Tips, Discussion Questions, and Common Mistakes

Flexible Classroom Application

Use this Grade 7 energy flow worksheet for classwork, guided instruction, review, or assessment within a unit on energy, heat, and thermal processes. The notes supplement can provide a reference during instruction or review, while the Teacher Guide supports discussion and helps teachers address common errors in interpreting energy systems.

The resource is identified with the Alberta framework and keeps students focused on the central idea that energy is accounted for as it moves through mechanical and industrial systems. Its emphasis on system models, energy losses, and efficiency gives students a structured way to connect diagrams with scientific explanations.