Lesson 2
2.1 Essential
Question:
1. How would you obtain clear water from a sample of muddy water?
2. How will you separate husk or dirt particles from a given sample
of pulses before cooking?
3. Is it possible to separate sugar mixed with wheat flour? If yes,
how will you do it?
4. Is filtration alone enough to clean dirty water ?
5. Why does visibility increase after rains?
6. How does a piece of cloth help in the filtration of muddy water?
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The class having 50 students . Divide the class in to 5 groups.Each
group having 10students depends upon
their ability, .skill and approach to
the project It emphasis team work, the bright children will get a chance for
peer instruction and the weak students also
benefit from the more advanced
group from this.
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2.3 Learning
Environment:
Each group has allotted a separate
working place from the effective interaction among the team members .Computer
labs will be used for the majority of
the on. line work
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2.4Assessment
Approach:
2.41 Authentic Assessment:
Different situations used at home to
apply different methods of separation of substances
An awareness talk on the topic
importance of methods of separation in our daily life
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2.42 Formative Assessment:
Regular assessment will be provided as
the students work on internet , survey table and presentation
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2.43 Summative Assessment:
Team portfolio in blogs
Ppt on different methods of separation
of substances
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2.44 Rubrics:
Survey at(a)home(b)construction
site(c)field
Table : Different situations used at
home as methods of separation
Final presentation : Quiz
Quiz on methods of separation Date:22-11-16
Choose the correct option
1.Butter is separated from milk by
(a)sedimentation (b)filtration(c)churning(d)decantation
2.Filtration is a method to separate the components of a _________
substances
(a)mixture of a liquid and insoluble substance (b)solution (c)both a
and b(d) pure substance
3.Threshing is done by
(a) beating (b)bullocks(c)machines(d)all the above
4.Which method is used to separate pebbles and stones from sand
(a)handpicking(b)winnowing(c)sieving(d)none of these
5.The components of a solution (sugar in water) can be separated by
(a)filtration(b)evaporation(c)sedimentation(d)all the above
6.The process of conversion of water vapour into liquid is called
(a)condensation(b)decantation(c)sedimentation(d)evaporation
7.A mixture of ammonium chloride and sand is separated by
(a)evaporation(b)decantation(c)sublimation(d) filtration
8.The property which forms the basis of sieving
(a)difference in weight(b)difference in colour(c)difference in
shape(d)difference in size
9.Which process is used to separate bacteria from water
(a)decantation(b)sedimentation(c)boiling(d)filtration
10.Name some materials that are used as filters
(a)filter paper(b)filter cloth(c)strainer(d)all the above
Answers
1.(c)Churning
2.(a)mixture of a liquid and an insoluble
3.(d)all the above
4.(a)handpicking
5.(b)evaporation
6.(a)condensation
7.(c)sublimation
8.(d)difference in size
9.(d)filtration
10.(d)all the above
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2.45 Gradings:
The project grades will be basis on a combination of scores
from assessments made during the project. A rubrics will be used to compile
the grades
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