Extremely fine sand is called

Complete the following web chart.

Find out the names of seven rocks in the given grid. The names may read forward, backward and across.

Number the steps of soil formation in the correct sequence. 

•  With the passage of time, cracks get bigger and bigger.
•  The sand gets mixed with humus and forms soil.
•  The hard rocks present on the surface of the earth are heated up by the sun and cooled down by rain and wind. Due to this constant heating and cooling, they develop cracks.
•  When the pieces of rocks rub against each other, they further break into very tiny particles forming pebbles, gravel and finally sand.
•  As a result, the rocks break up into smaller pieces. They are then carried away by wind and water.