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Biblioteka
Exploring Mixtures: Separation Techniques and Everyday Examples
Od Mr Pike
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What is a mixture?
A pure substance made of one type of particle
A combination of two or more substances that are not chemically bonded
An element found on the periodic table
A solid that dissolves in liquid
Which of the following are examples of mixtures? (Choose all that apply)
Saltwater
Sugar
Sand and gravel
Oxygen gas
A mixture always has a uniform composition throughout.
Tačno
Netačno
Which mixture can be separated using filtration?
Saltwater
Sand and water
Sugar in tea
Air
Why can't filtration separate sugar from Coca Cola?
Sugar is too big to pass through a filter
Coca Cola is a solid
Sugar dissolves in the liquid
Filtration is not effective for any liquids
What does evaporation mean?
A process that cools down a substance
A method to dissolve solids
The process of turning liquid into gas
A way to mix two different liquids
Which of these mixtures can you separate using evaporation? (Choose all that apply)
Rock salt dissolved in water
Oil and water
Sand and sugar
Saltwater
What is chromatography used for?
Separating solid from liquid
Analyzing blood samples
Separating different substances in a mixture
Creating energy
Chromatography can be used to separate different colors in ink.
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Netačno
When separating rock salt, which method would you choose?
Filtration
Magnetism
Evaporation
Digging
In a mixture of sand and salt, why is filtration a suitable method of separation?
Sand is larger than salt
Salt dissolves in water but sand does not
Both are liquids
Sand and salt turn into gas
What happens to particles during evaporation?
They change from solid to liquid
They move faster and spread out into the air
They become heavier
They combine to form new substances