Earth systems and sustainability are at the heart of this Grade 9 Science resource, where students examine how local resource management decisions can affect interconnected environmental systems and the communities that depend on them. Rather than treating land, water, air and living organisms as separate parts of the environment, students investigate how changes in one area can influence several others.

Explore connections, resource flows and environmental feedbacks

Students begin with a reading passage introducing interconnected Earth systems and the principles of sustainable resource management. They explore how forest management decisions can influence soil stability, stream temperature, water quality, wildlife habitat and community resource availability. The passage also introduces resource flows, including the movement of water, dissolved substances, nutrients and energy through environmental systems.

A key focus is understanding positive and negative feedback. Students examine how environmental changes can either amplify a disturbance or help reduce its effects. These concepts provide a foundation for evaluating why local environmental decisions can have consequences beyond their immediate location.

First Peoples perspectives and evidence-based decisions

The resource also addresses the importance of First Peoples perspectives in environmental decision-making. Students consider why Indigenous knowledge systems must be understood within their specific cultural and local contexts, why perspectives should be attributed to appropriate sources, and why meaningful consultation with relevant rights holders and communities matters.

Through the activities, students practise comparing resource management proposals using scientific evidence, observations, measurements, research and consultation. They consider ecological, social and economic consequences, including long-term effects, competing community needs, trade-offs and uncertainty.

What students practise

• Multiple-choice questions that assess Earth system connections, resource flows, environmental feedbacks and sustainable decision-making.
• True-or-false statements covering interconnected systems, Indigenous knowledge and environmental sustainability.
• Short-answer responses explaining forest management impacts, feedback mechanisms and useful evidence for comparing resource practices.
• A labeled diagram activity focused on the resource topic.
• A categorizing activity that reinforces distinctions between relevant concepts.
• A short-note activity for additional written practice.

What is included

• Student worksheet covering the concepts and activities described above.
• Separate PDF answer key for checking student responses.
• Student Notes lines at the bottom of the worksheet for recording important ideas.
• Teacher Guide within the Answer Key PDF, including Learning Objectives, Teaching Tips, Discussion Questions and Common Mistakes.

Classroom use

Use this Grade 9 Earth Science worksheet during an Earth systems and sustainability lesson, as guided classroom practice, or for independent review after introducing resource flows and feedback mechanisms. The reading provides background before students apply the concepts to environmental scenarios, while the written responses encourage them to justify decisions using evidence.

The included teacher guidance also provides useful support for classroom discussion about responsible resource management, community involvement and the relationship between scientific inquiry and First Peoples perspectives. It gives students an opportunity to consider not just whether a resource decision is possible, but whether its ecological, social and economic consequences make it sustainable in a particular place.