Variable A quantity that has the potential to change, e.g. weight, temperature, concentration.

Model A simplified picture of what's physically going on.

Prediction/Hypothesis A specific testable statement, based on a theory, about what will happen in a test situation.

Peer Review Where a scientific report is sent out to peers (other scientists) who examine the data and results, and if they think that the conclusion is reasonable it's published.

Prediction/Hypothesis A specific testable statement, based on a theory, about what will happen in a test situation

Precise Result A result that is really close to the mean.

Random Error A difference in measurement caused by an unpredictable factor, e.g. human error.

Repeatable Result A Result that can be repeated by the same person using the same method and equipment.

Reproducible Result A result that can be consistently reproduced in an independent experiment.

Valid Conclusion A conclusion that answers the original question.

Accurate Result A result that is really close to the true answer.

Variable A quantity that has the potential to change, e.g. weight, temperature, concentration.

Independent Variable The variable you change in an experiment.

Dependent Variable The variable you measure in an experiment.

Control Group A group in a study that is treated in exactly the same way as the experimental group, apart from the factor you're investigating.

Placebo A dummy pill or injection that looks exactly like the real drug, but doesn't contain the drug.

Sample size The number of samples in the investigation, e.g. the number of people in a drug trial

I cried like a baby. When no one could see me or hear me. Not because I feared what cancer would do, but because I didn't want the disease. I wanted my life to be normal, which it could no longer be.

By the time most people file for bankruptcy, their credit is already trashed, they have a high debt-to-income ratio - a key indicator lenders look at - and they've likely defaulted on more than a few accounts.

Endurance is the crowning quality, And patience all the passion of great hearts.

Guns go home with the soldiers, but landmines are designed to kill - mindlessly, out of control, for years.

Well, no, you can prepare it all you want, but I'd still stutter.

Israel... is one of the great outpost of democracy in the world.

I was raised Irish Catholic, but I don't consider myself Irish Catholic: I consider myself me, an American.

I eat, sleep, and drink my character. It is my fantasy to go to another planet.

Too much of what is called 'education' is little more than an expensive isolation from reality.

My children went to Bethesda Elementary School. I wouldn't do anything to endanger the safety of Bethesda.

Well the war lasted for three months, from April of 1994 until the Tutsi army, the exiles as it were, gained control of the country and then it stopped.

The man with a toothache thinks everyone happy whose teeth are sound.

I have worked with Divya Dutta in two National Award-winning Punjabi films. I have known her a long time; she is a fantastic actress. I sent her flowers after I saw 'Bhaag Milkha Bhaag.' Shabana Ji is, of course, a legendary actress. It was a great experience working with her.

People think I'm very nice, you know. And I'm not as nice as they think.

A lot of people don't just go ahead and try things.

At Rackspace, I'm building a media house which will celebrate small teams who are having world-wide impacts through their building or use of new technology.

The creation of a thousand forests is in one acorn.

There is nobody more dangerous than one who has been humiliated even when you humiliate him rightly.

Every human heart cries and yearns for the same thing: a chance to fulfill his or her own dreams and desires. Even the poorest man has a dream.

Never feel that a piece of criticism or advice is too much trouble to give, or that it exceeds your province.

The Ramones were inspiring a lot of bands that couldn't master their instruments.

Going forward, we must continue the fight to change the direction of our country.

Nato allies have been looking at various missile-defence options for some time. Nato itself is developing protections for our deployed troops.

I read a couple of books about neuroscience and the relationship between the mind and the body.