Examlex
There are no physical differences among Homo sapiens.
Physical Change
A type of change in which the form of matter is altered but one substance is not transformed into another, maintaining the material's chemical properties.
Carbon Dioxide
A colorless, odorless gas produced by burning carbon and organic compounds and by respiration. It is naturally present in the air and absorbed by plants in photosynthesis.
Iron
A metallic element (Fe) that is vital for biological processes in humans and other organisms, such as oxygen transport and cellular metabolism.
Scrap Metal
Waste metal materials that can be recycled and reused, often collected from leftover products, buildings, or discarded industrial machinery.
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