Grade 5 Science Q1 Ep1: Properties of Materials
Summary
TLDRIn this educational video, Grade 5 science teacher Vivian leads an exploration of material properties, crucial for safe and effective use. She introduces the concept of matter, its physical and chemical properties, and their applications in everyday objects like cooking pots. Through interactive questions and a practical example of making a toy doll, the lesson aims to deepen students' understanding of materials like metal, glass, plastic, and their respective properties such as malleability, combustibility, and thermal conductivity. The session concludes with a quiz to reinforce learning.
Takeaways
- 📚 The script is an educational video for grade 5 students, focusing on the properties of materials and their importance in everyday life.
- 🔍 The concept of 'matter' is introduced as anything that occupies space and has mass, with different states including solid, liquid, and gas.
- 🍳 A cooking pot is used as an example to illustrate the materials used in its construction, such as metal for the body, glass for the cover, and plastic for the handles.
- 🔨 Metals are highlighted for their malleability, which allows them to be shaped into various forms like the body of a cooking pot without breaking.
- 🔥 The script discusses combustibility, explaining why materials like wood, plastic, and paper are not suitable for cooking pots due to their tendency to burn.
- 🔊 The importance of thermal conductivity is covered, noting that metals are good conductors of heat, which is essential for cooking.
- ♨️ Plastic is identified as a poor conductor of heat, making it ideal for cooking pot handles to prevent heat transfer and potential burns.
- 👀 Glass is chosen for cooking pot lids due to its transparency, allowing users to see inside the pot without light scattering.
- 🧩 The distinction between physical and chemical properties of materials is made clear, with examples provided for each category.
- 🧲 Physical properties like hardness, brittleness, and malleability are characteristics that can be observed without changing the material's composition.
- 🌱 Chemical properties such as combustibility, flammability, toxicity, and reactivity are observed when a material undergoes a change to become a different substance.
Q & A
What is the definition of matter as discussed in the script?
-Matter is defined as anything that occupies space and has mass. All objects we deal with every day are matter as they take up space and have mass.
Why are most cooking pots made of metal according to the script?
-Most cooking pots are made of metal because metals have the property of malleability, allowing them to be shaped into different forms without breaking, and they are waterproof, preventing leakage of liquid ingredients.
What would happen if a cooking pot was made of wood, plastic, or paper?
-If a cooking pot was made of wood, plastic, or paper, it would likely burn because these materials have a high combustibility and cannot withstand the heat from a fire like metals can.
Why are the handles of a cooking pot fitted with plastic?
-The handles of a cooking pot are fitted with plastic because plastic has poor thermal conductivity, preventing heat from passing through and making it safe to touch even when the pot is hot.
Why is the cover of a cooking pot made of glass?
-The cover of a cooking pot is made of glass because of its transparency, allowing users to see what is happening inside the pot without opening it, and its hard but fragile nature, which means it can resist deformation but is not easily broken.
What are the two types of properties of matter discussed in the script?
-The two types of properties of matter discussed are physical properties, which can be observed or measured without changing the composition of the matter, and chemical properties, which are observed when matter undergoes a change to become a different substance.
What is the difference between flammability and combustibility as per the script?
-Flammability refers to the ease with which a material can be ignited, while combustibility determines whether a material will easily burn or not.
What property of materials is demonstrated by a ceramic mug according to the script?
-A ceramic mug demonstrates properties of being hard and fragile (brittleness), non-combustible, a poor conductor of heat (insulator), and non-toxic.
What property makes rubber suitable for making the body of a doll as described in the script?
-Rubber is suitable for making the body of a doll because it is soft, flexible, and durable, and it does not break easily, demonstrating properties of elasticity and malleability.
What material is used for the hair and shoes of Maria's doll in the script, and why?
-The hair and shoes of Maria's doll are made of plastic because it is flexible and waterproof, making it suitable for parts of a doll that may be exposed to wear and potential water contact.
What property of glass makes it a good choice for the cover of a cooking pot?
-Glass is a good choice for the cover of a cooking pot because of its transparency, which allows users to observe the contents without opening the pot, and its brittleness, which means it can be made thin and strong.
Outlines
🔬 Introduction to the Science Lesson
The lesson begins with a warm greeting and an introduction to the topic: the properties of materials. The teacher, Vivian, engages the students with a scrambled word game to guess 'matter' and recalls the definition of matter. She then takes the students to a kitchen setting to observe a cooking pot made of metal, glass, and plastic, prompting them with questions about the materials used.
🔍 Exploring Properties of Materials
Vivian discusses the answers to the questions posed earlier, explaining why cooking pots are made of metal and not wood, plastic, or paper. She introduces the concepts of malleability, waterproofness, combustibility, thermal conductivity, flammability, and reactivity. The lesson emphasizes the importance of these properties in the context of cooking pots.
📜 Identifying Physical and Chemical Properties
The lesson continues with a deeper dive into the physical and chemical properties of materials. Vivian explains the importance of understanding properties like hardness, brittleness, flexibility, elasticity, waterproofness, and thermal conductivity. She also discusses the chemical properties such as combustibility, flammability, toxicity, and reactivity, using various examples.
🎨 Helping Maria with Her Assignment
Vivian introduces Maria, a grade 5 learner, who needs help with her assignment. The assignment involves making a toy and explaining the choice of materials. The students help Maria design a doll made of rubber, plastic, and cloth, explaining the properties that make these materials suitable for the toy.
📚 Quiz and Lesson Conclusion
The lesson concludes with a quiz to test the students' understanding of the properties of materials. Vivian reviews the answers, reinforcing the concepts of malleability, thermal conductivity, elasticity, and hardness. The lesson ends with praise for the students' performance and a reminder to study regularly.
Mindmap
Keywords
💡Matter
💡Properties of Materials
💡Malleability
💡Waterproofness
💡Combustibility
💡Thermal Conductivity
💡Flammability
💡Reactivity
💡Toxicity
💡Elasticity
💡Transparency
Highlights
Introduction to the properties of materials and their importance in science.
Exploring the definition of matter as anything that occupies space and has mass.
Differentiating between the physical and chemical properties of matter.
Understanding malleability as the ability of metals to be shaped without breaking.
Discussing waterproofness as a key property for materials used in cooking pots.
The importance of combustibility in material choice for cooking pots.
Thermal conductivity as a factor in the efficiency of cooking pots.
Flammability and its relation to the safety of materials used in cooking.
Reactivity as a property that affects the interaction between cookware and food.
The use of plastic for cooking pot handles due to poor thermal conductivity.
Glass as a material for cooking pot lids due to its transparency.
The identification of physical properties such as hardness, brittleness, and malleability.
Chemical properties like combustibility, flammability, toxicity, and reactivity.
Practical application of material properties in creating a safe and durable toy.
Engaging with a hypothetical scenario to help a student named Maria with her assignment.
The significance of choosing materials based on their properties for toy design.
Interactive quiz to test understanding of material properties.
Review and reinforcement of key concepts through a self-test quiz.
Conclusion and summary of the lesson on material properties.
Transcripts
[Music]
as a young terrific day to you
kids together we'll explore
discover and find answers to the
mysteries of the world through
science i am your grade 5
super science teacher vivian
today we will learn about the properties
of materials
and why it is important to understand
these in using and handling them
are you excited let's go
join me let's enter the kingdom where
fun
and exciting learning experiences are
about to happen
only here at that edtv
i will be flashing a scrambled word on
the screen
guess what the correct word is
are you ready great
what word is this
[Music]
this word is matter
did you get it very good
can you still remember what is matter
let's recall matter
is defined as anything that occupies
space
and has mass all objects
we deal every day are all matter they
take up space
and they also have mess as discussed
in your science 3 matter comes into
different faces
which can be solid
liquid and gas
other phases of matter will be discussed
in your higher science subject
oops where do you think are we now
we are in a kitchen
for sure you all have seen and even used
a cooking pot
but can you name some properties of the
materials used in making cooking pots
children take a look at it it may
or may not look exactly the same as that
in your homes
but the parts are usually made of the
same materials
the cooking pot that you are seeing has
a body made of metal
a cover made of glass
and handles are fitted with plastic
let's go back to our classroom and
discuss what we have seen in the kitchen
but before we go to the properties of
the materials used in making cooking
pots
i'd like you to think of the answers to
the following questions
number one why are most cooking pots
made of metal number two
what will happen if the cooking pot is
made of wood
plastic or paper number three
what will happen if the cooking pot is
made of concrete
which is a mixture of cement water
and sand number four
why are the handles of the cooking pot
fitted with
plastic number five
why is the cover of the cooking pot made
of glass
i know you have your own answers in mind
before we check let us know first what
properties mean
and its two kinds properties
are the external and internal
characteristics of an
object there are two kinds of properties
of
matter first we have the physical
properties
that refer to the characteristics of
matter
that can be observed or measured without
changing its composition
some examples are malleability
[Music]
flexibility brittleness
elasticity waterproofness
and thermal conductivity
the second one is the chemical
properties
that refer to the internal composition
of matter
that can be measured and observed when
matter
undergoes change to become an entirely
different substance
some examples are toxicity
reactivity flammability
and combustibility
did you get it more of that as we
continue with
our discussion let's check your answers
and watch out for the terms that relate
to the properties of materials
are you ready let's go back to question
number one
why are most cooking pots are made of
metal
most cooking pots are made of metal
because unlike wood glass or plastic
metals can be hammered into different
shapes without
breaking this property of metals that
makes them easy to shape
such as the cooking pot's body is called
malleability
cooking usually involves water as an
ingredient
and metal like glass and plastic are
waterproof
this property that enables the metal
cooking pot
to prevent the liquid ingredients of
what is being cooked
from leaking refers to its
waterproofness
[Music]
let's discuss your answer for question
number two
what will happen if the cooking pot is
made of wood
plastic or paper if the cooking pot
is made of wood plastic or paper
it will burn because when cooking pot is
used to cook
food it is placed over fire
while cooking pots which are made of
metal
do not easily burn it can withstand the
heat
wood paper and plastic are examples of
materials that
easily burn the property of materials
that determines
whether or not they will easily burn is
called
combustibility
[Music]
when cooking pots are usually placed
over
fire metals can withstand the heat
and metals allow the heat from the fire
to pass through
into what is being cooked the property
of materials
that determines whether or not heat can
easily pass through the material
is called thermal conductivity
a related but different property which
is differentiated from combustibility
in terms of the ease with which a
combustible material can be
ignited is referred as flammability
how about the answer for question number
three
what will happen if the cooking pot is
made of concrete
which is a mixture of cement water
and sand the answer is no it will take a
longer time to cook the food
because heat cannot easily pass through
it
concrete is not as good a thermal
conductor as
metals another important consideration
in cooking
is to make sure that the material of the
cooking pot does not react with the
ingredients of the food of being cooked
[Music]
the property of materials that refers to
their ability
to undergo chemical reaction with other
materials
is known as reactivity
[Music]
most metals are non-reactive so it will
not
undergo chemical reaction with the
ingredients that may cause
poisoning making them safe as materials
for making cooking pots
it is important to use safe cookware
when preparing
food toxicity is the property of a
material to which a chemical substance
or a particular mixture of substances
can damage or harm an organism
how about question number four why are
the handles of the cooking pot
fitted with plastic the poor thermal
conductivity of a certain materials like
plastic
is also the reason why handles of the
cooking pot
are fitted with plastic because heat
cannot easily pass through plastic
in some cooking pots rubber is used
aside from being a good insulator rubber
also has the ability to be stretched and
returned to its original shape when the
stress is removed
a property called elasticity
again elasticity is the ability of
a material to be stretched and returned
to its original shape when the stress is
removed
lastly for question number five why is
the cover
of a cooking pot made of glass
the cover of a cooking pot is made of
certain kind of glass
so that one can easily see what is going
on inside
because glass is transparent
transparency is the ability of a
material
that allows light to pass through
without so much scattering
unlike plastic which easily deforms when
heated
less is hard and can resist deformation
however unlike metal which does not
break
easily glass is fragile
brittleness is a property which refers
to being both
hard and fragile now that you are
familiar with the properties of
materials
let's try what you've got let's identify
the object in terms of
brittleness combustibility
thermal conductivity and toxicity
put a check on the box that closely
describe the materials
object number one is a ceramic mug
let's identify its properties one by one
ceramic is made up of a mixture of clay
water and powder is it hard and flexible
or hard and fragile it is hard and
fragile
it easily breaks when accidentally
pushed
as to combustibility a ceramic mug
combustible
or non-combustible the answer is
non-combustible ceramics like plant pots
figurines and cups do not easily burn
how about as to its thermal conductivity
does it allow heat to pass through
it's a poor conductor of heat therefore
it's an insulator when it comes to its
toxicity
a ceramic mug toxic or non-toxic
it's a non-toxic material in fact
we use plates bowls and cups
which are made of ceramic
[Music]
let's move on to object number two a
wooden
hanger a wooden hanger is made of wood
is it hard and fragile or hard and
flexible
it is hard and fragile a wooden hanger
is breakable in terms of combustibility
do you think it will burn or not
remember it's a wood of course it will
burn
therefore it's combustible
what about in terms of thermal
conductivity
does it allow heat to pass through
no it's not therefore it's an insulator
how about its toxicity is it toxic
or non-toxic wood is non-toxic
in fact some of our kitchen utensils are
made of wood
and for the last object we have a
mineral plastic bottle
is it hard and fragile or hard and
flexible
it is hard and flexible it does not
break
easily when in terms of combustibility
is it combustible or non-combustible
it is combustible plastic is an example
of a combustible material does it allow
heat to pass through
it is not a good conductor of heat
therefore
it's an insulator that is why
handles of a cooking pot are fitted with
plastic
next is it toxic or non-toxic
it is a non-toxic material we even used
food containers which are made of
plastic
perfect are you still with me
good based on the properties mentioned
a while ago let's identify the physical
properties
and the chemical properties the
following
are the common physical properties of
materials
we have hardness
brittleness flexibility
elasticity waterproofness
thermal conductivity and malleability
they showed characteristics of matter
that can be observed or measured
without changing its composition
how about the common chemical properties
we have combustibility flammability
toxicity and reactivity
this group of properties are observed
or measured when matter undergoes change
to become an entirely different
substance
now i want you to sit back listen and
relax for a moment
i have a friend named maria
are you excited to meet
lend me your ears and eyes as i begin to
introduce her
maria is a grade 5 learner
let's say hi maria hi maria
do you know what maria needs
maria is here to ask help from us
she needs help in making her assignment
i want to help maria would you want to
help her too
is it a yes very good
her assignment goes this way if you were
to make a toy
what would you want to make and what
materials would you use
so that it will be safe to play and
durable
at the same time make a drawing of this
toy
and explain why would you use the
materials that you have
identified do you have an idea children
let's see what maria wants
oh i guess she wants a doll
children let's bring it on let's help
maria
maria's doll is made of rubber it is
safe to play
because it is soft flexible and durable
it does not break easily as well
the hair and shoes of maria's doll is
made of plastic
it is flexible and waterproof
the dress of maria's doll is made of
cloth
which is soft so that when it tears she
can just sew it
when it's dirty or has stained she can
just
wash it now let's give this to maria
how was that children did you enjoy
helping maria
if you are give me a smile
before we end this lesson let's try to
test yourself
read each questions carefully and choose
the letter
of the correct answer number one
which common property is evident
when crown caps or tencent can be
hammered into sheets
to make a doormat or an improvised
tambourine
a elasticity
b flexibility
c hardness d
malleability number two
white cooking pots are not made of wood
plastic or paper children
choose the correct statement or
statements below
one wood plastic
and paper are combustible they will burn
when placed over
fire two papers will absorb water and
easily get wet three
plastics will melt when exposed to too
much heat
four woods are not good conductors of
heat
it will not cook the food a
one only b two and three
c two three and
four d one
two three and four
number three which solid material
below is a good thermal conductor
a aluminum foil
b paper c
plastic bottle the
wine glass number four
which of the following solid materials
has the ability to be stretched
and can return to its original shape
when stress is removed
a mirror b
rubber band c sponge
d wood
number five which of the following
properties
describes the ability of a material
to resist pressure that may cause
deformation
or change in shape a malleability
b elasticity c
flexibility d hardness
are you done let's check your answer
number one if your answer is letter d
malleability you are correct
malleability is the ability of a
material
that can be hammered into sheets without
breaking
number two if your answer is letter d
statements one two
three and four are all correct
that's another point for you
cooking pots are not made of wood
plastic or paper because they are
combustible
they will burn when placed over fire
number three if your answer is letter a
aluminum foil you are correct
that is because metals like aluminum
are good conductors of heat they absorb
heat
very easily number four
if your answer is letter b rubber band
you are correct rubber band has the
ability to be stretched
and returned to its original shape when
the stress is removed
lastly we go to number five
if you answered letter d hardness
perfect you got it right
hardness is the ability of a material
to resist pressure that may cause
deformation
or change in shape did you get a perfect
score
wow let's all clap for ourselves
you did a great job
[Applause]
that's the end of our lesson i hope
you've learned
something new today this is your grade 5
super science teacher viviane
always remember make it a habit to study
it works till next time
[Music]
bye
[Music]
you
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