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Mixtures!
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Created on March 5, 2018
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Transcript
7th. March. 2018
Don´t forget!
SOCIAL SCIENCE: MIXTURES
#apieceofscience visit the classroom´s blog:
Teacher: Alba Pérez
SUBSTANCES
- Pure substances-
Questions!
What is a pure substance? What is a mixture? How many types of mixtures are there?
A pure substance consists of only one component. For example silver, salt and wood are pure substances.
- Mixtures-
A mixture happens when we put two or more substances together. For example, we can mix yoghurt with honey. There are two types of mixtures: heterogeneous mixtures and homogeneous mixtures .
HOMOGENEOUS MIXTURES
In a homogeneous mixture we put two or more substances together but we can´t see each of them separately. The whole mixture looks the same.
HETEROGENEOUS MIXTURE
In a heterogeneous mixture we put two or more substances together but we can see them separately. The whole mixture looks different.
Questions
Experiment time!
Which mixtures do you think can be separate using filtration? An evaporation?
Materials:
- A sieve
- Different substances
- Water
- Glasses
- A spoon
((Sugar, salt, sand, coffe...)
1. Mix each substance with some water in the glasses.2. Stir well using the spoon. 3. Put some mixture into the sieve to separate. Which ones worked? 4. Leave the mixture for a few days by the window. Which one worked?