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Which of these are examples of mixing and separating? removing seed casings from grains a soda bottle bubbling when it is opened  a bright copper statue turning green from weathering removing salt from seawater water decomposing to oxygen and hydrogen

Question

Which of these are examples of mixing and separating? removing seed casings from grains a soda bottle bubbling when it is opened  a bright copper statue turning green from weathering removing salt from seawater water decomposing to oxygen and hydrogen

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Solution

  1. Removing seed casings from grains: This is an example of separating. The process involves separating the seed casings from the grains, which are two different components mixed together.

  2. A soda bottle bubbling when it is opened: This is an example of separating. When a soda bottle is opened, the carbon dioxide gas that was mixed with the liquid is released, causing the bubbles.

  3. A bright copper statue turning green from weathering: This is not an example of mixing or separating. This is a chemical reaction known as oxidation where the copper reacts with the elements in the air and turns green.

  4. Removing salt from seawater: This is an example of separating. The process of desalination involves separating the salt from the water.

  5. Water decomposing to oxygen and hydrogen: This is an example of separating. Through a process called electrolysis, water can be separated into its two components, oxygen and hydrogen.

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