Tag Archives: chemical change

Yangtze River Turns Red and Turns Up a Mystery: Physical or Chemical Change?

For a river known as the “golden watercourse,” red is a strange color to see. Yet that’s the shade turning up in the Yangtze River and officials have no idea why. The red began appearing in the Yangtze, the longest and largest river in China…

via Yangtze River Turns Red and Turns Up a Mystery.

What are the possible reasons for this color change? What are scientists investigating as suspect sources? What do you think: Is this a physical or a chemical change?

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