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Natural sciences

Grade 4

Energy and change

Module 27

The danger of sunburn

Activity:

To point out the danger of sunburn

[lo 2.1]

List as many examples as you can of ways in which the sun is used.

Conduct a group discussion on the damage that the sun can do to your skin and then complete the tasks:

  1. If you spend too much time in the sun without taking any precautions, the following may happen:
  1. Think about what you could do to protect yourself against the sun. Cut relevant advertisements from old magazines and paste them on a sheet of paper.

3. Why do you think some people still spend time lying in the sun to become tanned?

  1. Write a letter to the principal of your school in which you offer suggestions for protecting the learners at the school against sunburn. Ask your educator to hand these letters to the principal.

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

Write down as many uses for the sun as possible.

  • The sun provides energy for humans, plants and animals.
  • The sun heats the earth.
  • The sun provides light for the earth.
  • The sun keeps us warm.
  • The sun helps plants to grow.
  • Any other acceptable answer.

Hold a group discussion on the damage that the sun can cause to your skin, and then complete the following activities:

1. One’s skin can be burnt very badly by the sun. It can be so severe that blisters can form.

2. Learners cut out pictures and paste them in the spaces provided. They can even bring real products that can be discussed in class.

3. Models who are used in advertisements are always depicted as being beautifully tanned. This puts pressure on ordinary people to try to look like them. (Here one could discuss peer pressure in general.) Any acceptable answer.

4. Let the learners write short letters to give to the principal. Interesting things should come out of this exercise.

MR BRAIN CELL

  • Approximately 150 million km from earth.
  • Temperature 15 million degrees Celsius.

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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