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Natural sciences

Grade 4

Planet earth and the universe

Module 48

Life at the north and south poles

Activity:

Talking about life in the polar regions

[lo 1.2]

Animal life at the north pole (the arctic)

Wolves, bears, squirrels and small birds live in the forests and in the summer the caribou, which is a sort of American reindeer, migrates to the north where it lives off wild plants.

Musk oxen live off the tundra throughout the year. They defend themselves from attacking wolves by standing in a tight circle.

In the winter most of the animals hibernate. Bears sleep in their lairs for most of the time and the squirrels curl up in their snug holes. They eat sufficient amounts of food in the summer to provide their bodies with energy through the winter.

Walruses also live here. They are family of the seals. They are mammals that are born live and drink from their mothers.

Polar bears are among the largest animals in the world. They have a thick, soft layer of hair against the skin and longer hair that forms a layer of fur over it.

Animal life at the south pole (antarctica):

The albatross is one of the largest of all the seabirds, and also lives at the South Pole. These birds fly over the sea looking for food in the water.

The largest animal in the world, the blue whale, lives in the waters of Antarctica. It grows to a length of 30 metres.

Very few types of animals live in Antarctica, but in the summer months seals and penguins go there to breed. The young are safe because there are relatively few predators to catch them.

Many different kinds of penguins live at the South Pole. The largest is the emperor penguin that can grow up to one metre in height. These birds cannot fly but they do swim very well.

How do people survive at the poles?

The Inuit people live in the Arctic region. They keep warm by wearing clothes made of animal skins. They live in small villages where it is necessary to melt ice to obtain water in winter.

They hunt to obtain food and live in ice huts called igloos. They build circles of ice blocks on top of each other, making the circles smaller and smaller until they form a dome. The spaces in between the blocks are filled with snow.

Another group of people, the Saami, lives in Lapland. They are well known for keeping reindeer for milk, meat and fur. They enjoy wearing traditional clothes when taking tourists for rides on snow sleds.

But these people work in factories nowadays and live in houses made from stone and wood. They wear modern clothes and ride around on snowmobiles.

Write a paragraph of 150 words on how animals have adapted to living in Polar Regions.

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

1.2 leads investigations and collects data.

Questions & Answers

how does Neisseria cause meningitis
Nyibol Reply
what is microbiologist
Muhammad Reply
what is errata
Muhammad
is the branch of biology that deals with the study of microorganisms.
Ntefuni Reply
What is microbiology
Mercy Reply
studies of microbes
Louisiaste
when we takee the specimen which lumbar,spin,
Ziyad Reply
How bacteria create energy to survive?
Muhamad Reply
Bacteria doesn't produce energy they are dependent upon their substrate in case of lack of nutrients they are able to make spores which helps them to sustain in harsh environments
_Adnan
But not all bacteria make spores, l mean Eukaryotic cells have Mitochondria which acts as powerhouse for them, since bacteria don't have it, what is the substitution for it?
Muhamad
they make spores
Louisiaste
what is sporadic nd endemic, epidemic
Aminu Reply
the significance of food webs for disease transmission
Abreham
food webs brings about an infection as an individual depends on number of diseased foods or carriers dully.
Mark
explain assimilatory nitrate reduction
Esinniobiwa Reply
Assimilatory nitrate reduction is a process that occurs in some microorganisms, such as bacteria and archaea, in which nitrate (NO3-) is reduced to nitrite (NO2-), and then further reduced to ammonia (NH3).
Elkana
This process is called assimilatory nitrate reduction because the nitrogen that is produced is incorporated in the cells of microorganisms where it can be used in the synthesis of amino acids and other nitrogen products
Elkana
Examples of thermophilic organisms
Shu Reply
Give Examples of thermophilic organisms
Shu
advantages of normal Flora to the host
Micheal Reply
Prevent foreign microbes to the host
Abubakar
they provide healthier benefits to their hosts
ayesha
They are friends to host only when Host immune system is strong and become enemies when the host immune system is weakened . very bad relationship!
Mark
what is cell
faisal Reply
cell is the smallest unit of life
Fauziya
cell is the smallest unit of life
Akanni
ok
Innocent
cell is the structural and functional unit of life
Hasan
is the fundamental units of Life
Musa
what are emergency diseases
Micheal Reply
There are nothing like emergency disease but there are some common medical emergency which can occur simultaneously like Bleeding,heart attack,Breathing difficulties,severe pain heart stock.Hope you will get my point .Have a nice day ❣️
_Adnan
define infection ,prevention and control
Innocent
I think infection prevention and control is the avoidance of all things we do that gives out break of infections and promotion of health practices that promote life
Lubega
Heyy Lubega hussein where are u from?
_Adnan
en français
Adama
which site have a normal flora
ESTHER Reply
Many sites of the body have it Skin Nasal cavity Oral cavity Gastro intestinal tract
Safaa
skin
Asiina
skin,Oral,Nasal,GIt
Sadik
How can Commensal can Bacteria change into pathogen?
Sadik
How can Commensal Bacteria change into pathogen?
Sadik
all
Tesfaye
by fussion
Asiina
what are the advantages of normal Flora to the host
Micheal
what are the ways of control and prevention of nosocomial infection in the hospital
Micheal
what is inflammation
Shelly Reply
part of a tissue or an organ being wounded or bruised.
Wilfred
what term is used to name and classify microorganisms?
Micheal Reply
Binomial nomenclature
adeolu
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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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