Natural law that explains how things work.

to higher degree than is usual or average.

person or organization that pays for or contributes to costs involved in staging sporting or artistic event in return for advertising. To pay for an event, usually as an advertisement.

supply of commodity not needed for immediate use but available if required. Areas of land set aside as a nature park. To not use all of, so you can use it later.

1000s.

Of the natural world of plants and animals.

Part taken from a longer written work. To get a person to share secret information.

Number of people who live in a country, area etc..

That cannot be imagined; unthinkable.

To protect and care for someone or something.

Work that a person does to assist others. To maintain a piece of machinery so it runs well.

formal assessment of something with intention of instituting change if necessary. Opinions, as in a paper, about movies, books, or plays. To formally examine something in the military.

period of ten years. Periods of 10 years.

Supported by written evidence. film or television or radio programme that provides factual report on particular subject.