Particle Analysis and Separation Methods Quiz

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Questions and Answers

Which type of substances can be physically separated into their parts?

  • Materials (correct)
  • Elements
  • Pure substances
  • Compounds

What causes a chemical change in water that breaks it down into oxygen and hydrogen?

  • Melting the water
  • Filtering the water
  • Heating the water
  • Running electricity through the water (correct)

Which substances cannot be physically separated or chemically changed into simpler substances?

  • Materials
  • Compounds
  • Elements (correct)
  • Pure substances

What is a substance that can only be separated into components by chemically changing the substance?

<p>Compound (A)</p> Signup and view all the answers

What does physically separating pure water result in?

<p>Two volumes of water (B)</p> Signup and view all the answers

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Study Notes

Physical Separation

  • Mixtures can be physically separated into their parts.
  • Examples of mixtures include sand and water, salt and pepper, and oil and vinegar.

Chemical Change

  • Electrolysis causes a chemical change in water that breaks it down into oxygen and hydrogen.
  • Electrolysis is a process that involves the passage of an electric current through a substance.

Elements

  • Elements are substances that cannot be physically separated or chemically changed into simpler substances.
  • Examples of elements include oxygen, hydrogen, and carbon.

Compounds

  • Compounds are substances that can only be separated into components by chemically changing the substance.
  • Examples of compounds include water (H2O) and carbon dioxide (CO2).

Physical Separation of Pure Water

  • Physically separating pure water results in the same substance, water.
  • No new substances are formed during physical separation.

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