Fill in the blanks:

(a) An electric fan converts electrical energy into …………… energy.

(b) Cooking gas converts …………… energy into heat energy.

(c) Energy possessed by a compressed spring is …………… energy.

(d) The ability to do work is called …………… .

(e) The energy possessed by a body due to its position is called …………… energy.

(f) The energy possessed by a body due to its motion is called …………… energy.

(g) Green plants convert …………… energy into chemical energy.

(h) The S.I. unit of energy is …………… .

(i) An object falling freely from the roof of a multistorey building has …………… and …………… energy when halfway down the building.

Write true or false for each statement:

(a) A man going up has potential energy and kinetic energy both.

(b) A gum bottle lying on a table has no energy.

(c) In an automobile engine, chemical energy changes into mechanical energy.

(d) Potential energy changes into kinetic energy when it is put to use.

(e) One form of energy cannot be converted into another form.

(f) There is always some loss of energy in conversion from one form of energy to another form, so the total energy is not conserved.

(g) The energy of flowing water can be converted into electric energy (electricity).

Define the term energy.

State the unit of energy and define it?