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Natural science

Grade 4

Energy and change

Module 25

The meaning of the word ‘energy’

Energy and change

What is the meaning of the word energy? If we consult a dictionary, it is defined as the power to operate or act or the capacity of a body or system to do work .

Activity:

To understand the meaning of the word “energy”

[lo 2.1]

The illustration below shows the manner in which we live nowadays. Discuss what you see and identify all examples of energy being used.

E

N

E

R

G

Y

Energy is the special power of your body to do work. If you work hard, you use much energy and need more. Sometimes you might not feel like getting out of bed in the morning, but at other times, you may feel that you have enough energy to climb a mountain.

Anything that works, even a machine, needs energy. People definitely need energy, even if it is to just stay alive.

There are many sources of energy in nature that can be used to do our work for us, but we need to realise that we will not have these sources forever. We therefore have to learn to use them with care. Many of the people in our country also do not have access to these sources of energy. Those of us who do have this should learn to regard it as a privilege and not as a right.

Assessment

LEARNING OUTCOME 2: CONSTRUCTING SCIENCE KNOWLEDGE

The learner will know and be able to interpret and apply scientific, technological and environmental knowledge.

Assessment Standard

We know this when the learner

2.1 recalls significant information.

Memorandum

THE MEANING OF THE WORD “ENERGY”

  • Have a lively discussion about the picture. Let the learners discuss it in groups first and then let them give feedback to the rest of the class. Then talk about energy in general. Refer to the picture while the module is being done.
  • First of all, before the assignment is done, have a general discussion on energy.
  • Any acceptable answer is correct.

Energy is life.

Nothing can exist without energy.

In order to work, I need energy.

Ready for the day!

Enough get-up-and-go for the day.

Something I can do.

I need energy to participate in sport.

Questions & Answers

how can chip be made from sand
Eke Reply
is this allso about nanoscale material
Almas
are nano particles real
Missy Reply
yeah
Joseph
Hello, if I study Physics teacher in bachelor, can I study Nanotechnology in master?
Lale Reply
no can't
Lohitha
where is the latest information on a no technology how can I find it
William
currently
William
where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
what are the products of Nano chemistry?
Maira Reply
There are lots of products of nano chemistry... Like nano coatings.....carbon fiber.. And lots of others..
learn
Even nanotechnology is pretty much all about chemistry... Its the chemistry on quantum or atomic level
learn
Google
da
no nanotechnology is also a part of physics and maths it requires angle formulas and some pressure regarding concepts
Bhagvanji
hey
Giriraj
Preparation and Applications of Nanomaterial for Drug Delivery
Hafiz Reply
revolt
da
Application of nanotechnology in medicine
has a lot of application modern world
Kamaluddeen
yes
narayan
what is variations in raman spectra for nanomaterials
Jyoti Reply
ya I also want to know the raman spectra
Bhagvanji
I only see partial conversation and what's the question here!
Crow Reply
what about nanotechnology for water purification
RAW Reply
please someone correct me if I'm wrong but I think one can use nanoparticles, specially silver nanoparticles for water treatment.
Damian
yes that's correct
Professor
I think
Professor
Nasa has use it in the 60's, copper as water purification in the moon travel.
Alexandre
nanocopper obvius
Alexandre
what is the stm
Brian Reply
is there industrial application of fullrenes. What is the method to prepare fullrene on large scale.?
Rafiq
industrial application...? mmm I think on the medical side as drug carrier, but you should go deeper on your research, I may be wrong
Damian
How we are making nano material?
LITNING Reply
what is a peer
LITNING Reply
What is meant by 'nano scale'?
LITNING Reply
What is STMs full form?
LITNING
scanning tunneling microscope
Sahil
how nano science is used for hydrophobicity
Santosh
Do u think that Graphene and Fullrene fiber can be used to make Air Plane body structure the lightest and strongest. Rafiq
Rafiq
what is differents between GO and RGO?
Mahi
what is simplest way to understand the applications of nano robots used to detect the cancer affected cell of human body.? How this robot is carried to required site of body cell.? what will be the carrier material and how can be detected that correct delivery of drug is done Rafiq
Rafiq
if virus is killing to make ARTIFICIAL DNA OF GRAPHENE FOR KILLED THE VIRUS .THIS IS OUR ASSUMPTION
Anam
analytical skills graphene is prepared to kill any type viruses .
Anam
Any one who tell me about Preparation and application of Nanomaterial for drug Delivery
Hafiz
what is Nano technology ?
Bob Reply
write examples of Nano molecule?
Bob
The nanotechnology is as new science, to scale nanometric
brayan
nanotechnology is the study, desing, synthesis, manipulation and application of materials and functional systems through control of matter at nanoscale
Damian
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Source:  OpenStax, Natural sciences grade 4. OpenStax CNX. Sep 18, 2009 Download for free at http://cnx.org/content/col11096/1.1
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