Grade 7: Earth Science

Here is a comprehensive overview of the Grade 7 Earth Science content, aligned with the British Columbia (BC) Curriculum.

In BC, the Grade 7 Earth Science unit focuses on Earth’s history and climate, exploring how our planet has changed over billions of years and how it continues to change today.

BC Grade 7 Science: Earth Science Unit – Earth’s History and Climate

This unit explores the questions: “How has Earth changed over time?” and “What factors influence Earth’s climate?” It examines geological history, climate systems, and the evidence scientists use to understand past and present environmental changes.

Overarching Big Ideas (for the Earth Science Unit)

• Earth and its climate have changed over geological time.

• The transfer of energy through the atmosphere creates weather and is affected by climate change.

Core Components of the Grade 7 Earth Science Unit

Part A: Geological Time and Earth’s History

• Key Concepts: Geological time scale, fossils, dating methods.

• Learning Goals:

  • Understand the geological time scale and the concept of “deep time.”

  • Identify major eras in Earth’s history and significant events in each (e.g., formation of Earth, first life, age of dinosaurs, ice ages).

  • Explain how fossils provide evidence of past life and environments.

  • Understand relative dating principles (e.g., superposition – older rocks are typically found below younger rocks).

Part B: Plate Tectonics and Earth’s Structure

• Key Concepts: Continental drift, plate boundaries, Earth’s layers.

• Learning Goals:

  • Describe the theory of plate tectonics and evidence that supports it.

  • Identify the three main types of plate boundaries and the geological features associated with each (convergent, divergent, transform).

  • Understand how plate tectonics has shaped Earth’s surface over geological time, including the formation of mountains, volcanoes, and earthquakes.

  • Identify the main layers of Earth (crust, mantle, core).

Part C: Earth’s Climate System

• Key Concepts: Weather vs. climate, climate zones, factors affecting climate.

• Learning Goals:

  • Differentiate between weather (short-term atmospheric conditions) and climate (long-term patterns).

  • Identify major climate zones and factors that influence climate:

    • Latitude and solar energy distribution

    • Ocean currents and their effect on regional climates

    • Prevailing winds and air masses

    • Topography (elevation, mountain ranges)

Part D: The Greenhouse Effect and Climate Change

• Key Concepts: Natural vs. enhanced greenhouse effect, human impacts.

• Learning Goals:

  • Explain the natural greenhouse effect and its importance for maintaining Earth’s temperature.

  • Differentiate between natural climate change and current human-caused climate change.

  • Identify human activities that contribute to climate change (e.g., burning fossil fuels, deforestation).

  • Understand some potential impacts of climate change relevant to BC (e.g., changing precipitation patterns, glacial retreat, sea level rise, ecosystem changes).

Part E: First Peoples Knowledge and Climate

• Key Concepts: Indigenous knowledge, historical climate understanding.

• Learning Goals:

  • Recognize that First Peoples knowledge and oral traditions provide valuable long-term perspectives on environmental change.

  • Understand how Indigenous knowledge systems have documented and adapted to climate variations over generations.

Curricular Competencies in Action (The “Doing” of Science)

• Questioning and Predicting:

  • “What evidence might indicate that BC’s climate was different thousands of years ago?”

  • “How might the movement of tectonic plates affect global climate over millions of years?”

• Planning and Conducting:

  • Lab: Modeling the Greenhouse Effect. Use two clear containers (one as control, one with added CO₂) under a heat lamp to measure temperature differences over time.

  • Investigation: Local Climate Data Analysis. Analyze historical temperature and precipitation data for the local region to identify trends.

• Processing and Analyzing Data and Information:

  • Interpret climate graphs and identify climate patterns.

  • Analyze fossil evidence to make inferences about past environments.

  • Create timelines showing major events in Earth’s history.

• Evaluating:

  • Evaluate different sources of climate data for reliability and bias.

  • Compare multiple lines of evidence for climate change.

• Applying and Innovating:

  • Contribute to care for self, others, and community by proposing actions to reduce local contributions to climate change.

  • Research and present on climate change impacts and adaptations specific to British Columbia.

• Communicating:

  • Create visual representations of Earth’s geological timeline.

  • Explain the difference between weather and climate using local examples.

Sample Learning Standards from the BC Curriculum

• Content: “Explain how evidence is used to understand changes in Earth’s climate over geological time.”

• Content: “Describe the characteristics and formation of Earth’s geological features.”

• Content: “Explain the greenhouse effect and its impact on global climate.”

• Curricular Competency: “Experience and interpret the local environment.” (e.g., observing local geological features and climate patterns).

Key Connections to Other Grade 7 Science Units

• Connection to Chemistry: The chemistry of the atmosphere (gases like CO₂, methane) is fundamental to understanding the greenhouse effect and climate change.

• Connection to Physics: Energy transfer and transformation principles help explain how solar energy drives Earth’s climate system.

• Connection to Biology: Climate and geological changes have driven evolutionary processes and affect current ecosystems and biodiversity.

This unit helps students understand that Earth is a dynamic system that has undergone dramatic changes over time and continues to change today. It provides essential context for understanding current environmental issues and our place in Earth’s long history.