Question

select all the correct answers.
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

Explanation:

• Removing seed casings from grains: Separates seed casings (impurity) from grains, involves separation.
• A soda bottle bubbling when opened: Carbon dioxide (dissolved, a mix) separates from soda as gas, involves mixing (dissolved) and separating.
• Removing salt from seawater: Seawater is a mix of salt and water; separating salt from it is a separation process.
• A bright copper statue turning green: This is a chemical reaction (corrosion), not mixing/separation.
• Water decomposing to oxygen and hydrogen: This is a chemical decomposition, not mixing/separation.

Answer:

A. removing seed casings from grains, B. a soda bottle bubbling when it is opened, D. removing salt from seawater