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Natural sciences

Grade 4

Planet earth and the universe

Module 45

Stormy weather

Activity:

Learning about stormy weather conditions

[lo 2.1, 3.1]

Stormy weather

:

What do you do when the weather is stormy? Tell the class about funny stories related to storms.

Dark clouds converge in the air. Heavy rains fall to the earth. Now and again there is a bright flash of lightning and we hear the roar of thunder. But what is actually happening?

Clouds:

The air is full of small dust particles. Water drops form around such dust particles and then form clouds together with millions of other drops.

Try the following:

Mark an empty bottle in mm and place it outside when it rains.

Lightning:

During a storm strong winds blow the small water drops that have formed around the dust particles, into the centre of the clouds where they bounce against each other. Each of the small particles of a cloud has either a positive or negative electrical charge. When the particles bump against each other the charges separate. The majority of the positive charges move to the top of the cloud and the negative charges move toward the bottom of the cloud. Lightning is a massive electrical spark in the cloud. This spark occurs when the negative charges in one cloud come into contact with the positive charges in another cloud or with the ground.

Thunder

Thunder is the loud noise that you hear when warm air and cold air suddenly come together. When lightning brightens the sky, it also heats the surrounding air. When this hot air comes into contact with the cold air, a gigantic wave of moving air causes the clap of thunder.

Dangerous weather

Tornado

This is a very strong wind that is caused when a front with cold and dry air comes into contact with warm, moist air. It causes a large black cloud in the air. The warm air rises rapidly and more warm air moves in below it to replace it. Sometimes the rising air begins to move in a spiral and a tornado develops. If a tornado reaches the ground, it causes incredible damage because it sucks up everything that it encounters on the ground into the air.

Hurricane

This is a very big storm that starts on the surface of tropical seas. It consists of a large quantity of wind and rain that begins to spin around its centre, which we call the “eye”. It moves forwards as it rotates and creates enormous waves that are very destructive.

Cut A4 sheets of paper into four (into quarters) to have one small sheet of paper for each learner in the class. Each learner must draw an aspect of the weather on his or her piece of paper. Work clearly and neatly. Stretch a washing line across the classroom and hang the drawings of the “weather conditions” from the line!

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.

LEARNING OUTCOME 3 : SCIENCE, SOCIETY AND THE ENVIRONMENT The 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.

Questions & Answers

What is deflation
Aluko Reply
Enumerate emotional intelligence to a manager
Chinonso Reply
What about Sydney Alexander's Absorption approach in international trade?
Vibhas Reply
I need help in inflation graphs
Brandon Reply
Select inflation type, Demand pull, cost pull or anticipation 1- Select the set of data you intend on graphing i.e inflation rate of 2017, location (particular country) 2 - Select the type of measurement tool that best allows you to input the inflation data, Consumer price index is the most accurate
Jama
this is to make sure you have all the correct information, Also use should know 1- Cost pull is Aggregate Demand and Aggregate Supply AD - AS graphed 2- Demans pull is Aggregate Supply and Aggregate Demand AS - AD graphed
Jama
what is production
Imoro Reply
what is a monopolistic competition?
moniman Reply
Enumerate emotional intelligence to a manager
Chinonso
Enumerate emotional intelligence to a manager
Chinonso
who is barter
Tening Reply
exchange goods each other
Seven
what is economic
Bah
is the use of scares resources to satisfy our unlimited needs and wants
Desiderius
how many kinds of utility functions?
Sadaf
What is partnership?
Jackson
the legal association of two or more people as co-owners of a business for profit.
harmony
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
why economic is a science
Imoro
Economics is referred to as a social science not a pure science. It's regarded as a social science because it makes use of the scientific method to solve problems. The scientific method refers to observation, asking questions, forming hypothesis, experimentation etc
Nkechi
Economics is a social science because it study human behavior how he relates with his daily activities with the available limited resources to satisfy his wants.
Ojo
what are the factors affecting the demand
Mohammed
yeah it uses the scientific method to study human behaviour.
Nkechi
inflation referes to the persistant increase in the general price of goods and services over a given period of time say a year.
Abdul
factors affacting Demand of good and services are 1.price of a commodity in question 2.price of related commodity 3.Income of a consumer 4.Population 5.tast and prefereance 6.Season or weather condition
Abdul
what is difference between perfect and non perfect market.
Saheed
what the difference between Trade off and Opportunity Cost?
Elzevery
answer
Golda
In trade off, you increase the amount of something by decreasing the amount of something else. For example, you use 2 hours to study and 2 hours for leisure. if you increase study hour by 1 more hour, i.e 3 hours, leisure time will decrease by 1 hour, i.e 1 hour.
harmony
In all, you would have traded off 1 hour of leisure time for 3 hours of study time. But in opportunity cost, you let something go in order to obtain something else entirely.
harmony
thanks for your idea
Elzevery
please i want help on thid question given P=$10 And TC=120+4Q2 1.find the profit maximizing level of price and quantity. 2.what will be the total profit?
Shemels
please how is substitutional effect affecting demand
Acha
if a price of a particular commodity is high people demand less ,they rather go for less one
FIDELIS
what is account
Wasif
account is an arrangement between a customer and a bank that allows the customer to play in and take out money (bank account)
Johnny
pay, not play sorry
Johnny
four effects of inflation in an economy
Acha
oil
TsendeTheRipper
decreases living standards .. decreases purchasing power.. Decreases internation competition . increases the cost of borrowing
MansoorAfghan
Inflation refers to persistent increase in the general prices of commodities.
Aluko
he asked for effects
MansoorAfghan
Low standard of living, prices of commodities will be high, devaluation of currency in the economy
Aluko
Debtors gain while creditors loses
Ojo
Hi every one
Ani
Hello
Ansah
hi
kelvin
hi
Seven
Hii
raushan
how are you all
Seven
Fin and you
raushan
me also
Seven
Whare do you live
raushan
general tendency of rising price and continuous... .
Auqib
any one among you is going to aaper in net exam day after tomorrow
Auqib
reply?
Auqib
pakistan
Seven
Oo Pakistan I am India
raushan
really from Pakistan
Auqib
ok
Seven
You noo hindi
raushan
no
Seven
hi
ken
what is deference between the producer and firm?
ISMAILI
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
in a comparison of the stages of meiosis to the stage of mitosis, which stages are unique to meiosis and which stages have the same event in botg meiosis and mitosis
Leah 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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