Match the following materials with their primary sources: Metal | Earth's crust; Plastic | Trees; Rock | Earth's crust; Wood | Petroleum.

Understand the Problem

The question is asking to match different materials with their correct primary sources. This involves understanding what each material is derived from in terms of natural resources.

More Information

Metals and rocks are sourced from the Earth's crust, which contains mineral ores. Plastic is made from petroleum, a fossil fuel, while wood is sourced from trees.

Tips

A common mistake is confusing plastic's origin with trees, providing the wrong material source.

Sources

• The Earth's Layers Lesson #1 | Volcano World - volcano.oregonstate.edu
• [PDF] 40 Common Minerals and Their Uses - National Mining Association - nma.org