cause, explanation, or justification for action or event. Explanations for why some things occurred or was done. think, understand, and form judgements logically.

Assistance or advice given to someone. To help prove or show that something is true.

Participant in experiment that is left untouched. To direct or influence the behavior of something.

Most popular.

device which detects or measures physical property and records. Device that detects movement or physical stimuli.

To move material to create a hole.

Having or using new methods or ideas.

Best liked or most enjoyed. A thing that someone likes best or enjoys most. record address of website or other data.

To make a machine work too hard so it might break.

lamp projecting narrow, intense beam of light directly on to place or person. illuminate with spotlight.

outside. without it being case that. in absence of.

comprise or contain as part of whole.

assembled or made from whatever is available, and so unlikely to be of highest quality. A small cut or mark on a surface. To rub your skin with your nails to stop an itch.

(Of building) old and in poor condition. analysis or summary of something by knowledgeable person.

used to refer to thing, no matter what.