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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

where we get a research paper on Nano chemistry....?
Maira Reply
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
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
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
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
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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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