If you could use any source of energy for heating your food, which one would you use and why?

Can any source of energy be pollution - free? Why or why not?

What do you mean by conventional sources of energy?

If a plant shows a symptom which could develop due to deficiency of more than one nutrient, how would you find out experimentally, the real deficient mineral element?

List four forms of energy that you use from moring , when you wake up, till you reach the school.

In a hill area pressure cooker is used for cooking food why?

Soni says that the acceleration in an object could be zero even when several forces are acting on it. Do you agree with her? Why?