3. Meaning of mixtures
A mixture is when you combine two or
more things together, but they don't join
together to make something new. Each
thing you mix keeps its own properties. For
example, if you mix sand and salt, you can
still see and feel the grains of sand and the
salt crystals separately
4. ACTIVITY
Mix the following things with peers and report
Sand with papers
Salt with sugar
Maize with beans
Water with sugar
5. TYPES OF MIXTURES
Homogeneous Mixtures: In a homogeneous mixture, the
components are uniformly distributed throughout the
mixture, meaning you can't see the individual parts with
the naked eye. It appears to be the same throughout.
Homogeneous mixtures are also called solutions. Examples
include:
Saltwater: Salt (solute) dissolved in water (solvent).
Air: A mixture of gases such as nitrogen, oxygen, carbon
dioxide, etc.
Sugar dissolved in water: Sugar (solute) dissolved in water
(solvent) to make a sweet solution.
6. TYPES OF MIXTURES
Heterogeneous Mixtures: In a heterogeneous
mixture, the components are not uniformly
distributed, and you can see the different parts with
the naked eye. The composition varies from one
part of the mixture to another. Examples include:
Salad: A mixture of various vegetables, fruits, and other
ingredients.
Soil: A mixture of organic matter, minerals, water, and
air.
8. WINNOWING,
Winnowing is a method of separating mixtures, typically used to separate heavier particles from lighter
ones, such as grains from chaff (the husks and other debris)
9. PICKING
Is a simple method used to separate mixtures by physically selecting and removing specific components by
hand.
10. SIEVING
Sieving is a method used to separate mixtures based on particle size. It involves passing a mixture
through a sieve, which is a device consisting of a mesh or perforated surface with uniform holes
11. USING MAGNET
Magnetic separation is a method used to separate mixtures based on magnetic properties. It involves the use
of magnets to attract and separate magnetic materials from non-magnetic materials
12. FILTERING
Filtering is a method used to separate mixtures based on the size of the particles. It involves passing a
mixture through a filter
13. DECANTING
Decanting is a process used to separate mixtures by pouring off a liquid layer while leaving behind the solid
sediment or other materials settled at the bottom of a container
14. SEPARATING FUNNEL
A separating funnel is a laboratory
glassware device used to separate
immiscible liquids or liquids with different
densities
15. ACTIVITY
Discuss the applications of separating mixtures in day to day life with peers
and report
16. EXTENDED ACTIVITY
Record yourself participating in winnowing at home and send to the teacher
for assesment
