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Natural sciences

Grade 4

Energy and change

Module 26

The sun as a source of energy for life on earth

Activity

To describe the sun as a source of energy [lo 2.1]

The sun, naturally, is our most important source of energy. People accept the sun as a matter of fact, because we see it rising every morning, and at night we see it setting. The sun radiates its energy in all directions all over the earth. The sun warms up the earth and, in this manner, supplies it with energy. Plants use some of this energy to grow and when animals eat the plants they also obtain some of the energy, so that they can use it to move around and to grow.

Where do people obtain energy?

Write a short sentence to explain what happens in each picture. Write your explanations neatly in the spaces provided below the pictures.

According to the above information, energy has been transferred from the sun to the wheat plant and then to Philip’s body. This transfer signifies exactly the same as your action when you share your lunch with your friend during break: You give it to him or to her.

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

SENTENCES THAT MATCH THE PICTURE

  • The sun gives energy to the wheat plant, which then stores the energy.
  • The bread and porridge now contain the energy from the wheat.
  • Now Phillip’s body absorbs the energy.
  • He uses energy when he practices.

HOW TO COOK FOOD BY USING SOLAR ENERGY

  • Take a polystyrene cup; line it with plastic and place food in it.
  • Cover the top of the cup with some plastic and fasten the cover securely with an elastic band.
  • Take a sheet of A4 paper or light cardboard and cover one side with aluminium foil, shape it into a cone and place it around the cup with the aluminium foil on the inside. Trim it neatly.
  • Place the cup with the cone in another polystyrene cup and place it in a container so that it will stay upright. One can put newspaper around it to keep it firm.
  • Now place it in a sunny spot, and make sure that the “oven” faces the sun.
  • Leave it like this until the food is cooked. Move the “pot” so that it is always in the sun.

Questions & Answers

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
what does nano mean?
Anassong Reply
nano basically means 10^(-9). nanometer is a unit to measure length.
Bharti
do you think it's worthwhile in the long term to study the effects and possibilities of nanotechnology on viral treatment?
Damian Reply
absolutely yes
Daniel
how to know photocatalytic properties of tio2 nanoparticles...what to do now
Akash Reply
it is a goid question and i want to know the answer as well
Maciej
characteristics of micro business
Abigail
for teaching engĺish at school how nano technology help us
Anassong
Do somebody tell me a best nano engineering book for beginners?
s. Reply
there is no specific books for beginners but there is book called principle of nanotechnology
NANO
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
s.
fullerene is a bucky ball aka Carbon 60 molecule. It was name by the architect Fuller. He design the geodesic dome. it resembles a soccer ball.
Tarell
what is the actual application of fullerenes nowadays?
Damian
That is a great question Damian. best way to answer that question is to Google it. there are hundreds of applications for buck minister fullerenes, from medical to aerospace. you can also find plenty of research papers that will give you great detail on the potential applications of fullerenes.
Tarell
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
Mostly, they use nano carbon for electronics and for materials to be strengthened.
Virgil
is Bucky paper clear?
CYNTHIA
carbon nanotubes has various application in fuel cells membrane, current research on cancer drug,and in electronics MEMS and NEMS etc
NANO
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
Harper
Do you know which machine is used to that process?
s.
how to fabricate graphene ink ?
SUYASH Reply
for screen printed electrodes ?
SUYASH
What is lattice structure?
s. Reply
of graphene you mean?
Ebrahim
or in general
Ebrahim
in general
s.
Graphene has a hexagonal structure
tahir
On having this app for quite a bit time, Haven't realised there's a chat room in it.
Cied
what is biological synthesis of nanoparticles
Sanket Reply
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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