Valid Conclusion A conclusion that answers the original question.

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.

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

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.

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

A growing body of evidence suggests that humans do have a rudimentary moral sense from the very start of life.

There is a double rhythm in all human beings. We are binary beings two arms two legs two eyes two ears. Two legs for walking. And the heartbeat thumping in our chest mirrors that.

I don't own a radio. I listen to everything through apps or on my iPhone. And then I download the shows I like. Shows like 'Fresh Air', 'Radiolab', 'Snap Judgement', all those shows.

The colonies had little occasion to feel or to resent direct royal prerogative.

Science may have found a cure for most evils; but it has found no remedy for the worst of them all - the apathy of human beings.

If you obey God with your whole heart, you'll usually scare off the folks who want you to obey them.

In a way, advertising, for all its shallowness, its love of design, its modishness and its self-justification, is curiously innocent. The idea of the hidden persuader or the manipulator is largely absurd.

If a man be gloomy let him keep to himself. No one has the right to go croaking about society or what is worse looking as if he stifled grief.

Everything starts with writing. I heard Nikki Giovanni and was blown away. I just thought 'wow'; she was writing from a black girl's perspective, and the imagery was so vivid that I started doing spoken word.

Giving birth was probably the most empowering thing I've ever done physically. I was like, 'Now I can do anything. I can run a marathon... I can run three marathons!'

I believe if a private citizen is able to affect public opinion in a constructive way he doesn't have to be an elected public servant to perform a public service.

I made a big family when I was working at 'Vogue' for ten years, and I'm still friends with a lot of them.

It's important for people who criticise architects - whether what they build is or isn't to your taste - to appreciate how they devote themselves and put everything into bringing a building into existence.

I'm a Buckeye at heart. I spend more time giving concerts in Ohio than I do in any other state - perhaps more time than I spend performing anywhere else in the world. I have a great relationship with the people of Ohio, and it's great to be near the OSU when I come to Columbus.

All of these people kept on being professional musicians and composers in the strictest sense.

What came up at age 49 is I realized that of all the things I'm interested in, the thing I'm most interested in is figuring out what makes people tick, why people think the way they do, why they act the way they do. And I realized that music is such a great way to investigate why people do what they do.

YouTube did more for me than 'America's Got Talent.'

It is not good to have a rule of many.

Lust is the craving for salt of a man who is dying of thirst.

Positiveness is a good quality for preachers and speakers because, whoever shares his thoughts with the public will convince them as he himself appears convinced.

Through sites like MySpace, people coalesce into interest groups, and this gives me the opportunity to do vast mailshots to people who like similar things.

I tried to have a cookie, and this girl said, I'm mailing these cookies to a friend. So I couldn't have one. You shouldn't make cookies untouchable.

David Bowie's my favorite musician. I love him above all, but I'm really into rap a lot right now.

It is not that I'm so smart. But I stay with the questions much longer.