Gun powder,dynamite and the materials used in firecrackers are ________________.

_____________is made by letting bacteria act up on all kinds of waste,such as animal dung,leaves,crop residue and even sewage from our homes.

Electricity is generated from the energy of wind in ________________.

The energy our body needs to function comes from ________________.

Electricity can be produced directly from solar energy with the help of _____________

Electricity produced from water is called _________.

If two bodies have the same mass,the one moving faster has ________________.

___________are the remains of plants and animals preserved between layers of rock.

We burn coal,natural gas and petroleum products such as petrol,diesels and Kerosene, to get energy.These things are together called ____________.

The energy we use to manual or physical work is ___________.