'Wind water ice' presentation slideshows

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A rock is a naturally occurring solid mixture of one or more minerals, or organic matter.

What is rock?. d. A rock is a naturally occurring solid mixture of one or more minerals, or organic matter. Rocks are classified by how they are formed, their composition, and texture. Rocks change over time through the rock cycle. What is rock cycle? .

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Flow of Energy and Matter

Flow of Energy and Matter. Ecosystem Recycling. Energy and matter flow through an ecosystem Plants get energy from the sun We get energy from what we eat Metabolism. Ecosystem Recycling. Matter must be recycled and reused. A few elements make up most living things CHNOPS

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