Tuesday, 11 December 2012

Soil is an amazing substance.

Soil is an amazing substance.

Soil is an amazing substance. It is a complex mix of ingredients: minerals, air, water, and organic matter—the countless micro-organisms and the decaying remains of once living things. Soil is made of life and soil makes life.
·        To the farmer, soil is where crops grow.
·        To the engineer, soil is a foundation to build.
·        To the ecologist, soil supports and connects ecosystems.
·        To the archaeologist, soil holds clues to past cultures.
·        To craftspeople, like potters, soil provides clay to make things.
·        To the soil scientist, soil is all of these things.
Soil has been called "the skin of the earth" because it is the thin outermost layer of the Earth's crust. Like our own skin, we can't live without soil.

Monday, 10 December 2012

All about the soil.

What soil is made up of ?

Garden soil

Clay soil

Sandy soil


Black or brown
Red or grey

Ability to hold water

Just the right amount of water for plants to grow
A lot of water
Very little water


Lots of pieces of dead animals and plants
Bits of stone particles
Little bits of dead animals and plants

Saturday, 8 December 2012

Uses of absorbent materials .

Uses of absorbent  materials .

·         We use a mop to dry the wet floor.
·         I use a sponge when I help my mother wash dishes.
·         Tissue paper is useful when I have a cold and need to blow my nose.
·         We can use cotton buds to clean our ears.
·         After bathing , I use a towel to wipe myself dry.
·         My father uses a piece of soft cloth to clean his spectacles.
·         I can use a handkerchief to wipe off my tears.

Wednesday, 5 December 2012


All about springs
·         A spring is made of steel.
·         A spring will return to its original size after we stretch it.
·         Some springs are easier to bend than others .
What can we do to a spring?
·         Squeezing
·         Bending
·         Twisting
·         stretching

Tuesday, 4 December 2012


What is the function of the switch in the circuit   ?

A switch simply opens a circuit, stopping the flow of electricity. For example: a simple circuit would be two wires from a battery, one of which goes to a switch, and the other goes to a light bulb. A third wire goes from the other side of the switch to the other conductor of the light bulb. With the switch closed the circuit is complete and the light goes on. Open the switch and the circuit is broken and the light goes off.

Saturday, 1 December 2012

Non-magnetic objects

Non -magnetic  objects 

Magnetic objects

Magnetic  objects 


The correct ways to handle a magnet .

The correct ways to handle a magnet .

·         We should not heat up a magnet.
·         We must not knock a magnet onto a hard surface.
·         Keep magnets in a cool and dry place.
·         We should not hit magnets with a hammer .
·         We must avoid hitting a magnet .

Friday, 30 November 2012

How do magnets work ?

How do magnets work ?
A magnet is a very special metal. When a magnet goes near a special kind of metal or other magnets, and the poles (sides) touching are opposite, it will pull, or attract the other metal or magnet closer. Also, if the two poles are the same, the two magnets will push away, or repel, from each other. This is called magnetism. Like poles (S-pole and S-pole/N-pole and N-pole) will repel each other while unlike poles (N-pole and S-pole) will attract each other.

Magnets are only attracted to special metals. Metals that have iron and steel attract magnets well. Metals like brass, copper, zinc and aluminum are not attracted to magnets. Also, non-magnetic materials such as wood and glass are not attracted to magnets as they do not have the right particles inside them like magnetic materials do.

A compass uses the Earth's magnetic field, and will always point to the North Pole. A north side of the magnet is attracted to the south side of another magnet. However, the north side of the compass points to the north pole, this can only mean that the "north pole" is really the magnetic south, and the "south pole" is really the magnetic north.

Thursday, 29 November 2012

Tuesday, 27 November 2012

External features of plants

Flowering or non-flowering plants

How to group animals according to thier foods ?

There are thousands of animal species in the world. Scientists classify animals into groups to help us understand the animal kingdom better. Animals can be classified in a variety of different ways.

What is a herbivore?
It is possible to group animals together based upon what they eat. Herbivores are animals that only eat plant material. Herbivores gain the nutrients they need from plants and leaves which store energy received from the sun. Herbivores need wide, hard-wearing teeth to munch on chewy plants. Some examples of herbivores include cows, sheep, horses and snails.

What is a carnivore?
A carnivore is an animal that mostly feeds on meat. Some carnivores, such as lions, stalk and kill their own prey, while other carnivores, such as hyenas, search for already dead carcasses to feast on. Carnivores need very sharp teeth and strong jaws for tearing meat from the bone. Lions, tigers, crocodiles, polar bears and wolves are all examples of carnivores.

What is an omnivore?
Omnivores are animals that eat both meat and plants. As you might expect, an omnivore has a reasonable amount of variety in its diet. A grizzly bear is an omnivore that eats fish and meat as well as grasses, nuts and berries.  

Thursday, 15 November 2012

Saturday, 6 October 2012