Friday, November 16, 2012

Magnet: Attract or Repel?

 

Magnets has North pole and South pole.

1

North pole attracts South pole.

2

North pole repels North pole.

South pole repels South pole.

3333

Wednesday, November 14, 2012

Magnet Attract Some Materials

 

Objects which are made of icon are attracted to magnets. They are called magnets objects, such as screw, scissor, nail and paper clip.

\Magnet 3Paper clips were attracted to magnet.

Magnet 2

Nails were attracted to magnet.

Monday, November 12, 2012

Handling Magnet

 

We should handle a magnet with care. We should not heat, knock or drop a magnet. The magnet will lose its magnetism and become weak.

 

 

When the bar magnets are not in use, they should be kept in pairs, North pole to South pole, with an iron keeper at each end.

photo(1)

Horseshoe magnet also needs a keeper.

keeper 1

Thursday, November 8, 2012

Uses Of Magnets

 

Magnets are used in many things such as in refrigerator, pencil case and compass.

pencil case

The magnetic bar is used to close the pencil case tightly.

untitled

Magnetic strip is used to close the door firmly.

compass

The magnetic needle helps to show directions,

Wednesday, November 7, 2012

How Magnets Work!

 

Introduction

A magnet is any object that has a magnetic field. It attracts ferrous objects like pieces of iron, steel, nickel and cobalt. In the early days, the Greeks observed that the naturally occurring 'lodestone' attracted iron pieces. From that day onwards began the journey into the discovery of magnets.

These days magnets are made artificially in various shapes and sizes depending on their use. One of the most common magnets - the bar magnet - is a long, rectangular bar of uniform cross-section that attracts pieces of ferrous objects. The magnetic compass needle is also commonly used. The compass needle is a tiny magnet which is free to move horizontally on a pivot. One end of the compass needle points in the North direction and the other end points in the South direction.

The end of a freely pivoted magnet will always point in the North-South direction.

attractrepel2

The end that points in the North is called the North Pole of the magnet and the end that points South is called the South Pole of the magnet. It has been proven by experiments that like magnetic poles repel each other whereas unlike poles attract each other.

Monday, November 5, 2012

What is a Magnet?

 

An object made of certain materials which create a magnetic field.

WMLN-100_1

Did you know that the name "magnet" was first used by the Greeks as early as 600 B.C. for describing a mysterious stone that attracted iron and other pieces of the same material? According to one Greek legend, the name magnet was taken from the shepherd Magnets who discovered the magnetic stone by accident when his staff was mysteriously attracted to the force of the stone. Another, and perhaps more believable, theory says that the word magnet came from a city in Asia Minor, called Magnesia, where many of these mysterious magnetic stones were found.

Saturday, November 3, 2012

Tuesday, October 30, 2012

Basic Needs Of Animals

 

Animals And Needs:

1. Animals belong to the group of living things, they needs:

- Foods

- Air

- Living place (Home)

- Water

Sunday, October 28, 2012

Animals And Their Foods

 

Animals that eat meat (Carnivore):

Animals that eat grass, plants (Herbivore):

Animals that eat meat, grass, plants (Omnivore):