Transcript
MIXTURES(UNIT TWO, LESSON 2.3)BY MARGIELENE D. JUDAN
LESSON OUTLINE
MixtureTypes of MixturesSeparating Mixtures
MIXTURE
2 or more substances held together by physical forces
They do not create a new substance
TYPES OF MIXTURES
Homogeneous MixtureHeterogeneous Mixture
HOMOGENEOUS MIXTURE
Homo means “same”Components are evenly distributed
Cannot be separated by physical means
EXAMPLES
SolutionsColloidsothers
HETEROGENEOUS MIXTURE
Hetero means “different”Components are not evenly distributed
Can be separated by physical means
EXAMPLES
SuspensionsEmulsionsothers
Identify the following if it is a homogeneous or heterogeneous mixture:
Sand + water
Answer: HeterogeneousThey are distinguishable.
Water
Sand
Juice powder + water
Answer: HomogeneousYou can’t distinguish the parts of the mixture
They have been evenly mixed.
Water??
Juice Powder??
Homogeneous or heterogeneous?
Answer: HeterogeneousThey are distinguishable and can be physically separated.
Red M&M’s
Orange M&M’s
Yellow M&M’s
Brown M&M’s
etc
Is air a mixture? If so, what kind?
Yes. Air is composed of 78% nitrogen, 21% oxygen, and less than 1% of argon, carbon dioxide, and other gases. Since you cannot distinguish them, air is a homogenous mixture.
COMMON METHODS OF SEPARATING MIXTURES
PickingMagnetic SeparationDecantationDistillationSolar EvaporationFiltration
PICKING
large solid to solid mixture
MAGNETIC SEPARATION
Solid to solid metal mixture
FILTRATION
Solid(not dissolved) to liquid mixture
SOLAR EVAPORATION
Solid (dissolved) to liquid mixture
DECANTATION
Liquid to liquid non-dissolvable mixture
Solid (settled on bottom) to liquid mixture
DISTILLATION
Liquid to liquid mixture
SEPARATING MIXTURES SUMMARY
Method Component 1 Component 2 Example
Picking solid (large chunks)
solid rock and gravel
Magnetic Separation
solid (metal) solid sulfur powder and iron fillings
Decantation liquid or solid (non-dissolvable)
liquid sand and wateroil and water
Distillation liquid liquid oil and wateralcohol and water
Solar Evaporation
solid (dissolvable)
Liquid salt and water
Filtration Solid (non-dissolvable)
Liquid or solid sand and gravelsand and water
Separating mixtures are not limited to one method. For example, you could separate sand and water through decantation, filtration, and evaporation, though some methods work best in different situations.
Activity: (1 whole sheet of paper) 1. Write a short paragraph about the mixtures you see at home, and tell why are they important to us. (5 pts)
Then, relate the lesson to your spiritual life. (5 pts)
Assignment: Notebook
I. Classify whether it is a homogeneous or heterogeneous mixture.
1. air
2. sand water
3. ink
4. different types of stones
5. oil and water
Assignment: Notebook
II. Identify which method is best to use in order to separate the following mixtures:
1. M&M’s chocolate
2. Alcohol and water
3. Saltwater
4. Sand and gravel
5. Iron fillings and talc powder
SOURCES:
Science Links 7 https://www.youtube.com/watch?
v=TlxajGi8bAI
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