Current Affairs 1st Class

Category : 1st Class

                                                                                              Air and Water

Air

Air living things need air to breathe. Air is a mixture of gases. We nither see it nor can touch it. But we can feel it's presence. Fish breathe through its gills. Air fills space and has weight.

Air makes the life possible on earth. Not only have human beings, even plants and animals also need air to survive.

Wind

Moving air is called wind. It can moves things.

     Windmill                                           Sailboat

Air helps in burning

A Candle is lit with a matchstick

The burning candle is covered with a glass jar air inside the glass jar

The candle is put out as there is no

Water

All living things need water to live. Water comes from rain. Rain water fills rivers, lakes and ponds.

Water is needed for many things

Water to drink                            Water for plant

Water for animal                                     Washing

Cooking                         Putting out fire

Bathing

Seas and oceans are the big water bodies. But we cannot use this water for drink because water of seas and oceans are very salty.

Storage of Water

Water can be stored in many ways.

       Dam                                             Well

     Bucket                                      Tank