1) when equal masses of hot water and oil at the same temperature are allowed to cool water cools slower than oil . why? 2) describe the structure and function of a maximum minimum thermometer .
3) what is the effect on the molecules of matter when the temperature is varied ?
4) "the sun is regarded as the main source of energy". justify .
5) why is the development and use of alternative energy source necessary in today's world ?
6) why coal is called the fossil fuel ?
7) write the differences between pressure and upthrust .
8) how does a hot air balloon rise up ?
9) explain the roles of piston valve of a water pump .
10) we experience nose bleeding while checking to higher altitude. why ?

those who will ans all these question i will mark brailiest
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