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Natural sciences

Grade 4

Planet earth and the universe

Module 38

Talking about satellites

Activity:

To talk about satellites

[lo 1.3, 3.1]

Objects that travel along a route or path in outer space are in an orbit.

Rockets or space shuttles propel satellites into space to where they are placed in an orbit where they have to keep travelling at the correct speed. When they travel too fast, they will veer off into outer space. If they are too slow, they will fall to the earth. People on earth use computers to control the speed of the satellites.

The use of satellites

Hold a group discussion about the uses of satellites and see how many your group can name. Give feedback to the class and write down the best ideas in the space below.

Where do satellites come from?

The following sentences have become mixed up. See if you can place them in the correct order by arranging the correct numbers in the blocks below.

1. In 1957 the Russians sent the first man-made satellite into space. Its name was Sputnik 1. Try to find more information on Sputnik 1.

2. Isaac Newton believed that people were able to make satellites that could orbit the Earth in the same way as the moon. But he needed something to get the satellite into space.

3. In 1961, Yuri Gagarin was the first person to be sent into space. After this, satellites were sent into space on a regular basis.

4. In 1929, Robert Goddard, an American, built a rocket that did not go very high, but this started the development of the technology that was needed.

5. In 1957 the Americans also tried to launch a satellite, the Vanguard, but it exploded on the launching pad!

6. In 1957 a dog called Laika was sent into space in Sputnik 2, and this showed that living creatures could travel in space.

Something interesting: Make your own action picture book.

  • Draw 32 blocks of the same size on a clean sheet of paper. Your teacher will show you pictures of a spacecraft being launched as an example. You can draw this or choose your own theme for your picture book.
  • Now draw a picture in each block showing the spacecraft taking off. Each block must show the craft a little further away from the launching pad and moving up into space. When the pages are bound together, you can let them flip and it will seem as if the spacecraft is lifting off.
  • When all your pictures are complete, cut them out neatly. Make two holes on the one side and place them in the correct order – 1 to 32 with number 1 at the bottom. Thread string through the holes to bind them. You could strengthen it with Sellotape.
  • Now hold your book by the side that is bound and flick through the pages from the back to the front with your other hand. Your picture should move. This should be great fun!

Assessment

LEARNING OUTCOME 1: SCIENTIFIC INVESTIGATIONSThe 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

1.3 evaluates data and provides feedback on observations.

LEARNING OUTCOME 3: SCIENCE, SOCIETY AND THE ENVIRONMENTThe learner will be able to demonstrate an understanding of the interrelationships between science and technology, society and the environment.

Assessment Standard

We know this when the learner

3.1 understands science and technology in the context of history and personal knowledge.

Memorandum

SATELLITES

  • The usefulness of satellites
  • Have a group discussion on the usefulness of satellites and see how many your group can name. Give feedback to the class and write down the best ones. These are good examples:
  • We can communicate with people all over the world by means of telephone, faxes, Internet, e-mail, etc.
  • We can take pictures of space
  • By means of photos we can gain information about what is happening in space and on other planets
  • We can look at earth from space
  • We can predict the weather accurately
  • We can listen to the radio
  • We can watch direct sport broadcasts, even if they happen in other countries

Where and how did satellites originate?

The following sentences have been shuffled. See if you can put them in the right order by placing the numbers correctly in the blocks.

1. Isaac Newton believed it was possible to make a satellite and send it into space to orbit earth, just like the moon. But he needed something to get the satellite into space!

2. An American, Robert Goddard, built a rocket in 1926. It did not go very high, but at least it was the beginning of the technology.

3. In 1957 the Russians sent the first man-made satellite into space. It was called Sputnik 1. See if you can find more information on Sputnik 1.

4. In 1957 a dog called Laika was sent to space in Sputnik 2, to prove that living beings can travel in spacecraft.

5. In 1957 America also tried to launch a satellite, but the Vanguard exploded on the launch pad!

6. In 1961 the first human, Yuri Gagarin, was sent into space. After this, satellites were launched regularly.

  • Something interesting: Make your own action picture booklet.
  • Show enough pictures and books so that learners can get a good idea of satellites.
  • Attached is an example you can show the class. Let them make their own creative booklets.

Questions & Answers

Would you expect the kinked demand curve to be more extreme (like a right angle) or less extreme (like a normal demand curve) if each firm in the cartel produces a near-identical product like OPEC and petroleum? What if each firm produces a somewhat different product?
James Reply
no
Sadaf
what is supply
Mizta Reply
what is opportunity cost
Mizta
The opportunity gained interms of opportunity lost is known as opportunity cost Or The second best alternative use of resources
Mir
forgone alternative: like forgoing Something our of two to buy one
Tam-Waribo
what is macro economic s
Addo Reply
macroeconomics is the study of economic as a whole level.
Gafar
meaning of positive science
Sumit Reply
positive science it is focused on facts and cause and effect and behavioural relationship and include developmental testing in economic theoreis.
Gafar
what is inflation
Sama Reply
inflation is the general price increase of goods and services in an economy.
tesfie
Inflation is the persistent rise in the general price level
T-Max
inflation is characterized by increase in the general price of goods and services. when there is too much money in circulation. increase in demand of goods pursuing fewer goods. when purchasing power of money decreases .
Ejikeme
inflation is the persistent rise general price level
Habeeb
inflation is the persistent increase in price
Machall
hi
Rafiu
yes
boston
hi
Ayaan
how are you
Ayaan
increase in the general level of price...
sade
what is deflation
Sele
is the gradual decrease of currency exchange in a country.
Gafar
why ecnomics important ? give answer plz
Saifullah
Because is a field of science study that reflects on our day to day activities with human behavior.
ANSU
different between demand and quantity demand
Farhan Reply
No difference
MansoorAfghan
demand is the overall demand for it
MansoorAfghan
actually theres no difference
MansoorAfghan
quantity demanded is used in Equilibrium of d and s
MansoorAfghan
for evrything else u use deman
MansoorAfghan
the difference of it is that when demand simply denotes the willingness and a person's ability to purchase. And as against quantity demand represent the amount of an economic good or services desire by a consumer at a fixed price .☺
Gafar
how to calculate inflation
Richard Reply
Explain the factors that have led to high quantity demanded
Ogwang Reply
price of the product increase of price substitute product as people shift to cheap one
Black
what are the methods used by trade union to increase wages of their members?
Black Reply
strike
Pearl
the size of the commodity
Mensah
increase demand of labour decrease supply of labour
Black
I do support your answer Jackel.
keshav
but how do they do it?
Black
by increasing more labour and reduced the suppliers
Mensah
they can not increase labour, they increase demand of labour.
Black
how do they increase demand for labor?
Black
by analyzing the market equilibrium , cost reduction and cost control , savings in time .
yash
decreasing supply of labour are achieved through training and certification that require for you to employed, you must have certificate, also trade union encouraged government to restrict migration into the country causing shortage of labour supply. Note that the aim of union is to enhance life
Black
objective of union: better working conditions, liveable wage, protect member from unfair treatment which are done through negotiations betweens representative and management. known as collective bargaining.
Black
what is the nature of economics?
Tyscar Reply
economics is a social science since it seeks to solve social problem of scarcity
Jamal
main concerns is the decision individuals make on the allocation of scarce resources among the competing wants
Black
in the short run firm produce a positive as long as the price is larger than what?
yoel Reply
what is economic
Bah Reply
economics is the study of managing the resources in order to maximize the needs and satisfy the wants to a great extent in a regulated set-up..
Muhammad
One explanation for deviation when there is no impact on balance of trade
Shaneel
economic s is a social science that deals with human behavior as a relationship between ends and scarce means which has alternative uses
Derokiz
economic is a study of mankind in ordinary business of life
FIDELIS
economics it is the study of social science that deals with human behaviour as relationship between ends and scarce means which have alternative uses
salam
Economic is the use of scarce recourses to attain economic dough effectively and efficiently.
Addo
economics is the study of how humans make decisions in the face of scarcity. Eg. family decision, individual decision, and societal decision.
Gafar
what is diminishing returns
Blessed Reply
what is the difference between calculus linear equation and derivative?
Bti
whats inferior goods?
jaamac Reply
Good having low quality , also known as giffin goods. When income increases people shift to better quality goods . Hence having a negative effect on inferior goods rather than positive relation ( ie when income increases demand increases but not in case of inferior goods ) example wheat and bajra .
yash
What do u understand by the word ENDS in professor Lord L C Robinson definition of Economics?
Kaba Reply
I understand that ENDS is the unlimited needs of human. But we have limited resources to achieve our unlimited needs/wants. Thank you.
Midhun
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
Privacy Information Security Software Version 1.1a
Good
While the American heart association suggests that meditation might be used in conjunction with more traditional treatments as a way to manage hypertension
Beverly Reply
Researchers demonstrated that the hippocampus functions in memory processing by creating lesions in the hippocampi of rats, which resulted in ________.
Mapo Reply
The formulation of new memories is sometimes called ________, and the process of bringing up old memories is called ________.
Mapo Reply
Berger describes sociologists as concerned with
Mueller 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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