Human influence on climate and ecosystems is the focus of this Grade 9 Science worksheet on Earth and Human Activity. Students examine evidence from atmospheric carbon dioxide records and connect human activities with changes in the atmosphere, biosphere, and hydrosphere.

The resource uses the Keeling Curve as a central example of long-term atmospheric carbon dioxide data. Students explore how fossil fuel combustion, deforestation, and urbanization can alter Earth systems, while considering seasonal patterns, vegetation loss, temperature, and precipitation changes.

What Students Practice

Students work with a reading passage, multiple-choice questions, true-or-false statements, short-answer responses, a labeled diagram, a categorization activity, and a short note. The tasks ask students to interpret evidence, distinguish anthropogenic environmental changes from natural patterns, explain cause-and-effect relationships, and connect climate variables with changes in the biosphere and hydrosphere.

Specific concepts include atmospheric carbon dioxide trends, fossil fuel combustion, photosynthesis, deforestation, land-use change, urbanization, vegetation cover, satellite observations, temperature, precipitation, habitats, water movement, and interactions among Earth systems.

Included for Teachers and Students

• Student worksheet with dedicated notes lines at the bottom
• Answer Key PDF with a Teacher Guide
• Teacher Guide sections covering Learning Objectives, Teaching Tips, Discussion Questions, and Common Mistakes

Classroom Use

Use this Earth science worksheet as guided classroom practice, independent work, review, or an evidence-based discussion starter. The reading passage establishes the scientific context before students apply the ideas through varied question and activity formats. Short-answer prompts provide opportunities to explain what long-term carbon dioxide records reveal, describe how deforestation influences the atmosphere, and distinguish climate trends from individual weather observations.

This resource also gives teachers a practical way to reinforce climate change evidence and human impacts on Earth systems without separating the atmosphere, biosphere, and hydrosphere into isolated topics. The included Teacher Guide provides instructional support for introducing the concepts, guiding discussion, and addressing common misconceptions.

NGSS is the named framework for this resource.