1. Matter- Mixtures and their Separation
Grade 5 Week 3

2. 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.

3. 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).

4. In a mixture, substances do not react chemically, thus they can be separated more easily by physical means.
Pure water
Ways that the components of a mixture can be separated…
1) Evaporation
Evaporate water out!
salt

5. Filtration can be used to filter particles out of dirty water.
Other examples…
Since iron is magnetic, passing a magnet over the mixture will pull the magnet out!
2) Using a magnet
3) Filtration
Filtration can be used to filter particles out of dirty water.

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

7. The difference between a mixture and a compound:
Example: pure H2O
Emphasize: The H-atoms are now chemically bonded to the O-atom- NOT easily separated….
Example: candy mixture
Compounds cannot be as easily separated as substances have chemically combined!
Mixtures can easily be separated by physical means….