ghizer cultures

strict ghizer is rich in variety of cultures mainly, ishkoman , yaseen and gupis.Each region has its owpn typical cultures.different languages (dialects) are spoken in these regions. Shine,khowar, brushiski and wakhi dialects are spoken in  this district.Some cultures are common in four of the regions such as music,folklores and folk tales they celebrate some typicul festovals. In punial,shislogot  and doankha are celebrated in the beginning and at the end of their traditional year. in Yaseen  takhum raisy festival is celebrated in march .marriages are celebrated more or less in a same way.Music(tamasha)is thrvital part of marriage ceremonies

What is heating and cooling?

Touch something hot and your senses immediately tell you to pull your hand away. hotness is about the amount of heat energy an object has.

a spark from a firework may be very hot but it will not hurt very much becuse it does not contain much heat energy/however,even though a cup of tea may not be very hot,it can still burn the tongue because it contains a lot of heat energy

refraction in different materials

when light enters a material at an angle, it changes direction because its speed changes. if the material is very dense, the light slows down more and so the refraction is greater

apparent depth

one of the effects of refraction is that the brain can be tricked into thinking that things are in a different place from where they really the bottom of a pool of water...

What is global warming?Explan

As we said above, the vast amount of man-made gases are buildig up a layer, like a blanket

the energy saving home

combining solar power with the skilful use of insulating materials should lead to the building pf houses that use very little,if any, other form of heating .
solar panels on the roof are positioned to catch as much sunlight aspossible.these will providewarm water which can be stored in insulated tanks.
large double(or triple)glazed windows are positioned on the side of the house with most sunlight and small windows elsewhere.
agreenhouse or conservatory is built no the sunny side of the house.the warm air from rir from here can be circulated around the house.

the using electromagnets

electromagnets are used in many domestic and industrial devices. they are used for lifting, sorting and moving objects as well as for recording information. for an electromagnets to do a useful job, it needs to produce a very strong magnnetic field.

electromagnets have a coil of  copper wire wound tightly around an iron core   using  iron in the core makes the magnet 2000 times stronger then the  same solesoid with nothing but air inthe core.whenthe current in the coil is switched on, the magnetic field of the solenid magnetizes the iron, which has a much stronger magnetic fieldthan the solenoid on its own. another advantage of using iron is thet the core loses its  magnetism as soon as the current is turned off. iron is asoft magnetic material.

electromagnts can be used to separatr ferrous metals like iron and steel from non-ferrous metals like copper and aluminium. they are also used in many other devices sush as loudsspeakers and electric motors.

what is refraction of light?

light travels at almos 300,000 km/s in air but slow down when it enters a diffrent materil such as water or glass.if a ray of light meets the new materail at an angle ,it bends. this bending is called refraction

as it leaves  the glass it speeds up again and so bend away from the normal. the ray emerging from this ractangular block is parallel to the ray going  in.

refrraction in different materials

when light enters amterial at an angls,it changes direction becuse its speed changes. if the material is very dense,the light slows down more and so the refraction is graeter.

apparent depth  one of the effects of refractionis that the brain can be tricked into thinking that things are in a different place from where they really are. fish can compensate for refraction between water and air. this is how they can catch insects at the surface and avoid predators such as herons.