production and discharge of something. A substance (e.g. gas) released into the air.

covering or submerging of normally dry land with large amount of water. To quickly appear unexpectedly and in volume.

Whether it is raining, sunny, cold etc. outside. To erode or become damaged due to the environment.

number equivalent to product of hundred and ten.

action of one object striking another. Very strong influences. To hit or strike someone or something with force.

degree or intensity of heat present in substance or object.

title at head of page or section. To travel or move toward a particular place.

action of making something clean. To make neat and orderly e.g. a room.

change resulting from cause. Tricks used in films to make an event seem real. cause something to happen.

By a large amount and very suddenly.

A country in central Europe, on the Baltic Sea in the north; population 80,700,000 (estimated 2015); capital, Berlin; official language, German..

Greenhouse gas that makes the Earth get warmer. Glass building used for growing plants.

Increasing a lot in a short time, e.g. of prices. To fly or rise high in the air.

Having power or authority.

person who is studying or has expert knowledge of one or more of natural or physical sciences. People who are trained in a science.