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Natural sciences

Grade 4

Energy and change

Module 29

Wind as a source of energy

Activity:

To talk about wind as an enjoyable source of energy

[lo 3.2]

Being out of doors on a windy day can make us feel energetic. There are many ways in which we can enjoy the wind.

Form groups and take a minute to think about the nicest way in which one could enjoy the wind.

When groups report back, decide which idea will be the cheapest to follow, and which will be the most expensive.

Which group’s idea will require the least effort, and which will require the most effort?

Write labels for the following pictures.

Identifying other uses of wind [lo 1.3]

Plants also make use of the wind!

Wind disperses the seeds of plants and trees. Plants that use the wind in this way have very light seeds.

Interesting facts: Some seeds have wings that help them to “fly”.

Other seeds glide like parachutes.

The feathers of birds help them to glide on the wind. If the wind is strong, birds are assisted to fly for hundreds of kilometres when they migrate to other countries.

Some animals, rabbits for instance, sniff the air when they are eating. Because the wind carries the smell of their enemies, they are warned of danger.

The pilot of an aeroplane depends on the windsock at the airport so that he or she can determine from which direction for taking off or landing. The windsock also indicates the direction of the wind.

Assessment

LEARNING OUTCOME 1 : SCIENTIFIC INVESTIGATIONS The learner will be able to act confidently on curiosity about natural phenomena, and to investigate relationships and solve problems in scientific, technological and environmental contexts.

Assessment standard

We know this when the learner

  • evaluates data and provides feedback on observations.

LEARNING OUTCOME 3 : SCIENCE, SOCIETY AND THE ENVIRONMENT

Assessment standard

We know this when the learner

  • understands the impact of Science and Technology.

Memorandum

If one is out of doors on a windy day, one can feel very energetic. There are many ways in which one can enjoy the wind.

  • Write captions to the following pictures.

One can participate in water sports.

One can fly in a glider!

One can fly a kite.

Let us think of conditions when the wind could be dangerous

1. Trees can be uprooted, they can destroy motor cars and houses, roads can be blocked, power lines can be blown down and homes can be left without electricity.

2. Storms at sea can cause flooding on land, and ships can be wrecked.

3. Tornadoes are the strongest kind of wind-storms and can have a velocity (speed) of up to 300 km per hour. A tornado can cause incredible damage.

4. Wind can cause soil erosion. Think of ways in which it can be prevented.

5. If the wind blows from one direction all the time, trees can grow skew. How can we live safely in such conditions?

6. If a veld fire occurs, wind can make it worse and massive plantations can be destroyed.

7. Breakwaters can be built along the coast to prevent the water from flooding the land.

8. Some animals live safely in their underground tunnels.

9. In dangerous places bridges and roads are closed temporarily so that motorists will not travel there.

10. Rows of trees and hedges can be planted along cultivated fields to prevent the crops from being damaged.

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
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
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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