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Separation | Year 5 Science PDF Download

Separating a Mixture

  • When substances are mixed together, they may need to be separated for various reasons.

Ways of Separating Substances

Sieving

  • Sieving is a method used to separate solid substances of different sizes by using a mesh called a sieve. 
  • This allows smaller particles to pass through while retaining larger particles.
  • A mixture like sand and gravel can be separated using sieving.

Separation | Year 5 Science

Filtering

  • You can separate a mixture of sand and water by filtering it through a piece of filter paper. 
  • The water passes through the tiny gaps in the paper, but the sand particles are too large and remain on the surface of the filter paper.

Separation | Year 5 Science

Evaporating

  • By dissolving salt in water, you create a solution. You can separate the salt from the water by boiling the solution. 
  • The water will evaporate completely, leaving the salt behind.

Separation | Year 5 Science

Question for Separation
Try yourself:
Which method is best used to separate a mixture of sand and gravel?
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FAQs on Separation - Year 5 Science

1. How can substances be separated in a mixture?
Ans. Substances in a mixture can be separated through methods such as filtration, distillation, chromatography, and evaporation.
2. What is the purpose of separating a mixture?
Ans. The purpose of separating a mixture is to obtain pure substances for further use or analysis.
3. Can all substances in a mixture be separated easily?
Ans. Not all substances in a mixture can be separated easily, as some may have similar physical or chemical properties, making separation more challenging.
4. What is the importance of understanding different separation methods?
Ans. Understanding different separation methods is important for various industries such as pharmaceuticals, food processing, and environmental sciences to ensure the purity of substances.
5. How does the choice of separation method depend on the properties of the substances in the mixture?
Ans. The choice of separation method depends on factors such as the physical properties (e.g., solubility, boiling point) and the amount of substances in the mixture, as different methods are more effective for specific types of mixtures.
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