Filtration/Evaporation Sept 15 and 16

Using what you learned about density (a physical property) how could you separate a mixture of plastic chips (density 0.8 g/mL) and rocks (1.4 g/mL).  How does this relate to essential question #2?

s  Learning Target

I will learn how filters can be used to separate parts of a mixture based on the physical properties of the substances.

s  Criteria for Success

I will be able to explain how using a filter to separate a mixture is a physical process.

s  Filtration

The process of passing a liquid or gas through a filter in order to remove solid particles.

Air Filters have tiny holes that let air through, but trap particles in the air.

s  Filtration can be used to separate a mixture. Some parts of the mixture will go through the filter, some will be trapped by the filter.

s  Reflection

Explain how using a filter to separate a mixture is a physical process.

•       Give an example of a mixture that can be separated by filtration. What type of mixture is it? How is filtration helpful in your own life?

•       Learning Target

I will learn how evaporation and filtration can be used to separate a mixture.

•       Criteria for Success

I will be able to give examples of mixtures that can be separated using physical change. I will be able to explain what physical change can separate those mixtures.

•       Evaporation

The change of a liquid into a vapor at a temperature below the boiling point.

•       Evaporation is a physical change! The water molecules spread out, but are still
water
molecules.

•       Was your hypothesis right?
What was left in the filter for the salt water solution?
What was in the petri dish for the salt water solution? 

•       Was your hypothesis right?
What was left in the filter for the sand and water mixture?
What was in the petri dish for the sand and water mixture? 

•       Reflection

Give examples of mixtures that can be separated using physical changes. Explain what physical process can separate those mixtures.