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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

Application of nanotechnology in medicine
what is variations in raman spectra for nanomaterials
Jyoti Reply
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
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
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
Is there any normative that regulates the use of silver nanoparticles?
Damian Reply
what king of growth are you checking .?
Renato
What fields keep nano created devices from performing or assimulating ? Magnetic fields ? Are do they assimilate ?
Stoney Reply
why we need to study biomolecules, molecular biology in nanotechnology?
Adin Reply
?
Kyle
yes I'm doing my masters in nanotechnology, we are being studying all these domains as well..
Adin
why?
Adin
what school?
Kyle
biomolecules are e building blocks of every organics and inorganic materials.
Joe
anyone know any internet site where one can find nanotechnology papers?
Damian Reply
research.net
kanaga
sciencedirect big data base
Ernesto
Introduction about quantum dots in nanotechnology
Praveena Reply
hi
Loga
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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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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