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Natural sciences

Grade 4

Planet earth and the universe

Module 49

The seasons in the polar regions

Activity:

Talking about the seasons in the polar regions

[lo 1.3]

If we look at a globe, the North Pole is at the top and the South Pole is at the bottom. The northern polar region is also known as the Arctic and the southern polar region is called Antarctica. These are some of the coldest parts of the whole world and many parts are covered in ice throughout the year.

Different kinds of ice:

Ice formed on land is called sheet ice.

Ice “rivers” that are formed on mountains and move slowly down the valleys to the sea, are called glaciers.

Floating ice formed on the surface of the sea is called pack ice.

  • As the earth orbits the sun, the weather changes according to seasonal patterns. During the warm summer months more solar energy reaches the earth than in the cold winter months. The nearer you live to the Polar Regions, the more noticeable the changes are. Many animals and plants are affected quite drastically by the seasons and adapt their lives to the seasonal changes.

Autumn

  • During autumn many animals prepare for winter when it will be very difficult for many of them to find food. They collect food and store it in safe places. Some birds migrate to warmer parts of the world.
  • Some trees lose their leaves in autumn.

Winter

  • The fur of most animals becomes thicker to enable them to cope better with the winter cold. They only need a few things to survive the winter: food, shelter and water. Just before the worst cold of winter, some animals eat lots of food and then sleep to conserve energy. We talk about them hibernating. You can help birds in your garden to survive by putting out food for them.
  • Trees that lose their leaves protect the new leaves for the coming year within their buds.

Spring

  • Buds and blossoms appear everywhere when it is time for new leaves and flowers. Animals once again become active and prepare their shelters for their young. Animals that have hibernated wake up. The warmth of the spring and spring rains allow the grasses to grow for the animals to eat.
  • Birds that migrated return and prepare nests to lay their eggs. By the time that the eggs hatch in late spring there will be sufficient insects for them to eat.

Summer

  • Plants grow quickly because there is sufficient sunlight. Animals shelter in the shade when it becomes too hot. Many animals now give birth to young that need care. Animals look for water to help keep cool.

Organise an exhibition around each season in your class. Bring things to school that relate to specific seasons.

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

1.3 evaluates data and provides feedback on observations.

Memorandum

Mr Brain Cell:

  • Why is it so cold at the poles?Answer
  • When the sun shines on the equator, all the rays are close together and therefore it is hot there. Since the earth is ball-shaped, the rays are spread over larger areas closer to the north and south poles. The rays are weaker, and therefore it is cold at the poles.

Mr Brain Cell:

  • How is an iceberg formed?
  • Make one for yourself so you can see the large section of ice that stays submerged, and the section that is above water. What danger does this hold for ships? Which ship sank as a result of hitting an ice-berg in 1912?Answer:
  • Fill a plastic bag with water and freeze it. Remove the ice from the bag and put it in a bowl of water. See how large the part is that stays under water!
  • Large pieces of ice break from icecaps and glaciers and float on the sea. As they drift to warmer seas, they start to melt and break up. However, some icebergs can take up to three years to melt.
  • Titanic

Questions & Answers

where we get a research paper on Nano chemistry....?
Maira Reply
nanopartical of organic/inorganic / physical chemistry , pdf / thesis / review
Ali
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
hey
Giriraj
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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