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Forces

Describing Motion

Forces in Interactions

Effects of Forces

Gravity

Electricity

Magnetism and Electromagnetism

Energy

Forms of Energy

Measuring Kinetic Energy

Potential Energy in Systems

Earths Systems

Energy in Earth's Systems

Scales of Change on Earth’s Surface

Earth's Tectonic Plates

The Rock Cycle

The Water Cycle

Earth's Natural Resources

Ecosystems

Resources in Living Systems

Interactions Among Organisms

Changing Ecosystems

Capturing the Sun’s Energy

Using Stored Energy

Food Webs and Trophic Pyramids

Global Cycles of Matter

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