Electricity

Electricity

Importance Of Soil

Importance of soil.

Photosynthesis

Photosynthesis

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.

All about the soil.

What soil is made up of ?

	Garden soil	Clay soil	Sandy soil
Colour	Black or brown	Red or grey	Yellowish
Ability to hold water	Just the right amount of water for plants to grow	A lot of water	Very little water
Contents	Lots of pieces of dead animals and plants	Bits of stone particles	Little bits of dead animals and plants

Soil

Soil layers song

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.

Absorption

Absorbent and non-absorbent

The objects that use springs to work

The objects that use springs to work from phooiyinloi

Springs

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

Switch

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.

Conductor and Non-conductors

Conductor non conductor from phooiyinloi

Electricity

Electricity

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 .