2. Handpicking is a convenient method of
separating substances, when the quantity
of impurities is usually not very large.
- can be used for separating slightly
larger sized impurities like the pieces of
dirt, stone, and husk from wheat, rice or
pulses.
3. Threshing is the method that generally
used by the farmers to separate the
grains from the stalks after harvesting.
The dried stalks are beaten or threshed
to separate the grains. However in large
farms threshing is done by using
machine
4. Winnowing is used to separate heavier
and lighter components of a mixture by
wind or by blowing air.
This method is commonly used by
farmers to separate lighter husk
particles from heavier seeds of grain.
5.
6.
7. Sieving - It is a simple technique for separating
particles of different sizes.
A sieve such as used for sifting flour has very
small holes. Coarse particles are separated or
broken up by grinding against one-another and
against screen openings. Depending upon the
types of particles to be separated, sieves with
different types of holes are used.
8.
9.
10. Decantation is a process of separating
mixtures by removing a layer of liquid,
generally one from which a precipitate
has settled.
A mixture of an insoluble solid in liquid is allowed to
stand. If the solid is denser than the liquid, it will settle
at the bottom if kept undisturbed for some time.
Sedimentation - the a process where
particles settle at the bottom of the liquid.
11.
12.
13.
14. Decantation can also be used for liquid
mixtures.
It is used when separating two or more
immiscible liquids.
Once the mixture components have
separated by forming layer between them
in a container, the lighter liquid is poured
off leaving the heavier liquid behind.
15. Decantation: Miscible and Immiscible
Observe if the liquids completely
mixed with each other. If they
did, they are called miscible
liquids. Liquids which do not
mix together and form layer
between them are called
16.
17.
18.
19.
20.
21. What is magnet?
Magnets are objects made of
magnetic materials that produce a
magnetic field. Magnets pull other
objects made of magnetic materials
towards them. They will either
attracts or repel other magnets.
22. Magnetic Separation is a process of
separating mixture which magnetically
susceptible material is attracted from a
mixture using a magnetic force. It is a form
of separating mixtures which involves using
a magnet to attract another magnetic object
away from the substance it is in.
23. What process is used in separating
magnetic and non-magnetic materials?
How do we separate magnetic and non-
magnetic materials?
How would you describe the process of
separating mixtures through magnet?
Is it useful to our daily life?
24. In everything we do, we should
always be extra careful especially in
the food that we are going to partake.
Thus, it is very much important that in
the
processing period it should always be
clean and safe for eating.
26. Filtration is the process of separating
suspended solid matter from a liquid, by
causing the latter to pass through the pores of
some substance, called a filter. The liquid
which has passed through the filter is called
the filtrate. The filter may be paper, cloth,
cotton-wool, asbestos, slag- or glass-wool,
unglazed earthenware, sand, or other porous
material.
27.
28.
29.
30.
31. Filtration is the process of separating solid substances from
a liquid through the use of a filter paper or any cloths that can be
used as a
filtering medium. These solid residues are trapped by the filter
paper
1. filter – an apparatus containing a filter medium
2. filter medium – example filter paper or cloth
3. residue – a usual small amount of something that remain after a
a process
has been completed or a thing has been removed
4. filtrate – something that remain after a process has been
completed or a
thing has been removed
32. Apparatuses to be used
in filtering:
1. funnel
2. cloth / filter paper
3. iron stand and iron
ring
4. beaker / Erlenmeyer
flask / any container
34. Evaporation can be used as a separation
method to separate components of a mixture
with a dissolved solid in a liquid. The liquid is
evaporated, meaning it is convert from its
liquid state to gaseous state. This often
requires heat. Once the liquid is completely
evaporated, the solid is all that is left behind.
35.
36.
37.
38.
39.
40. COPY AND ANSWER ON YOUR
SCIENCE NOTEBOOK
1. Read the lesson content of the module on page 22 -
28
2. Do the Learning Task 1 and Learning Task 2 on
page 28 - 29.
Editor's Notes
There are various methods of separating mixtures that are commonly found in the surroundings. Handpicking is a convenient method of separating substances, when the quantity of impurities is usually not very large. This method of handpicking can be used for separating slightly larger sized impurities like the pieces of dirt, stone, and husk from wheat, rice or pulses.
