<< Chapter < Page Chapter >> Page >

Natural sciences

Energy transfers and forces

A. forces

Educator section

Memorandum

Leaner section

Content

Activity: to report on a human achievement in science [lo 3.1]

Newspapers and magazines published many articles on Mark Shuttleworth’s space travels because he can be regarded as a pioneer in this field. Use these articles as sources of information to write a report (± two folio sheets in length) on his journey. More interesting information and photographs are available on the website: http://www.africaninspace.com.

Guidelines for assembling the contents of your report:

1. Mark Shuttleworth, his dreams and ideals

2. Preparing for the journey

3. Reasons for the journey

4. The journey

5. The significance of the journey for people in general and for South Africa?

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

_____________________________________________________________________

B. Magnetism

It is said that the Greeks discovered a strange type of stone more than 2 000 years ago. While Magnes, a young shepherd boy, was looking after sheep one day, he realised that a strange black stone that exerted so much force on it that he could not withdraw the staff attracted the iron tip of his staff. The fable suggests that the word ‘magnet’ is derived from the name of this boy. Of course, we cannot verify this, but it is a fact that certain kinds of black stone attract similar stones and certain metals. Many such stones are found in the vicinity of Magnesia, in Turkey, and they are called lodestones, or magnet stones. The word ‘magnet’ therefore is probably derived from the name of this city. These stones are natural magnets. We nowadays use synthetic magnets made of iron or steel. These magnets are manufactured to attract objects very forcefully and to retain their magnetism for a long time. The magnets in your school’s laboratory may come in any of the following four different shapes:

Bar-shaped magnets
Horseshoe-shaped magnets
Cylindrical magnets
Ring-shaped magnets

Magnets have to be handled with care to prevent loss of magnetism.

Bear the following in mind when you use a magnet:

  • Do not handle the magnets roughly, i.e. do not drop it or knock against it.
  • Do not heat magnets.
  • Always store magnets with their locking devices in position.

1. magnetic and non-magnetic materials

Magnets do not attract all materials. The following experiment will help us to determine whether a material substance is magnetic or non-magnetic.

Assesment

Learning Outcome 3: The learner will be able to demonstrate an understanding of the interrelationships between science and technology, society and the environment.

Assessment Standard 3.12: We know this when the learner understands science as a human endeavour: compares different interpretations of events

Questions & Answers

what is the stm
Brian Reply
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 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
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
How can I make nanorobot?
Lily
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
how can I make nanorobot?
Lily
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
Difference between extinct and extici spicies
Amanpreet Reply
Got questions? Join the online conversation and get instant answers!
Jobilize.com Reply

Get the best Algebra and trigonometry course in your pocket!





Source:  OpenStax, Natural sciences grade 7. OpenStax CNX. Sep 16, 2009 Download for free at http://cnx.org/content/col11077/1.1
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Natural sciences grade 7' conversation and receive update notifications?

Ask