Common Question Answers
The rocks which occur above the coal seams were gradually deposited below sea-level. Remains of marine animals would naturally fall into the old forests when they were in this position. …
Read more.Fossils of sea animals are very often found among coal. How is this explained ?
Coal is found not in large solid masses as a rule but.in layers called seams. Some of these are only a few inches thick, whilst others are many feet in …
Coal is supposed to have been formed from vegetation which grew upon the earth thousands of years ago. The soil was so fertile and the climate so warm that ferns …
A “barometer (from Greek baros, weight; and metron, a measure) is an instrument for measuring the pressure or*weight of the atmosphere.
The mountain ranges of Australia are situated near the coast. The moisture-bearing winds from the ocean lose their moisture before they reach the interior, which is as a result parched …
Read more.Why is the interior of Australia more or less a desert ?
A clay soil retains moisture and cools the air overlying it. I t often causes fogs. Sandy soil being hot and dry, tends to make the climate of a country …
The atmosphere takes very little heat from the sun’s rays as they pass through it. It is heated by contact with the eirth which has absorbed the solar heat, and …
Read more.Why is it generally cooler on the top of a mountain than in a valley ?