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Matter- Mixtures and their Separation. Grade 5 Week 3. What are mixtures?. When substances are combined without chemically reacting , mixtures are formed. In a mixture, each component or part retains its own original properties. Solutions are mixtures. Lemonade is a mixture.

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Presentation Transcript
what are mixtures
What are mixtures?
  • When substances are combined without chemically reacting, mixtures are formed.
  • In a mixture, each component or part retains its own original properties.
solutions are mixtures
Solutions are mixtures.

Lemonade is a mixture.

Coffee is a solution.

In a solution, you observe only one single phase

(solid or liquid or gas).

slide4
In a mixture, substances do not react chemically, thus they can be separated more easily by physical means.

Pure water

Evaporate water out!

salt

other examples
Other examples…

Since iron is magnetic, passing a magnet over the mixture will pull the magnet out!

Filtration can be used to filter particles out of dirty water.

slide6

A mixture problem

The recent oil spill in the Gulf has been a challenge for scientists. How do we separate the oil from the water in an effective way?

Here a clean up crew up scoops up oil from the beach….

the difference between a mixture and a compound
The difference between a mixture and a compound:

Example: pure H2O

Example: candy mixture

Compounds cannot be as easily separated as substances have chemically combined!

Mixtures can easily be separated by physical means….