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

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.

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

To attempt the destruction of our passions is the height of folly. What a noble aim is that of the zealot who tortures himself like a madman in order to desire nothing, love nothing, feel nothing, and who, if he succeeded, would end up a complete monster!

The less secure a man is, the more likely he is to have extreme prejudice.

Sometimes, it's good to have a tremendous star, because everyone understands he has to get the ball.

I don't want to disrupt anything. We never conceive of our products as disruptive - we don't look at something and say, 'Let's disrupt that.' It's always about how we can evolve this and make this better.

At first people refuse to believe that a strange new thing can be done, then they begin to hope it can be done, then they see it can be done--then it is done and all the world wonders why it was not done centuries ago.

Sexuality is a big issue, but there are others - how much you commit to a relationship, to social obligation, to honesty and being honest with yourself.

We need to rediscover the idea of the common good and work together to build a home.

I never felt being an actor or making a movie was an easy thing to do.

I do consider myself to be a feminist.

Education exposes young people to a broader world, a world full of opportunity and hope.

I want to make this perfectly clear: you can be sure that I will never be a yes-man except to my own conscience.

I can write absolutely anywhere. All I need is a laptop.

Larry Kasdan has made some of my favorite movies of all time so just to be working with him was a pleasure. Now that I have, I not only respect his work but I just love and respect him as a person.

May the sun in his course visit no land more free, more happy, more lovely, than this our own country!

Before the final battle in 'Poison Princess,' Evie remembered how to use her Empress powers, practiced with them to the point of exhaustion, then had a trial by fire. In a way, she earned those powers, as she hadn't before, so that was certainly a confidence builder.

I hate puppets so much.

Now a movie goes out to two, three thousand theaters and by Friday night at 10 o'clock they know if you are in or out. That desperate competition is, I think, horrendous. It's awful.

Training is full-on. Some days I really don't want to get out of bed and hit that track again. Sunday and Monday morning sessions are always horrible. But who really looks forward to going to work on a Monday morning?

The candle burns not for us, but for all those whom we failed to rescue from prison, who were shot on the way to prison, who were tortured, who were kidnapped, who "disappeared". That's what the candle is for.

On Monday I come in and get in a full body workout, and then I come back in on Wednesday and do a quick six, which consists of bench press, biceps and triceps curls, pull downs, something for the back and the neck. And then you come back and hit it again on Friday with a 16-machine workout.

Just as I'm fortunate to pitch in the big leagues, I'm also fortunate for the time I get to spend outdoors.

It's the movies that have really been running things in America ever since they were invented. They show you what to do, how to do it, when to do it, how to feel about it, and how to look how you feel about it.

In today's U.S., it's possible for almost anyone - women, gays, African-Americans, Jews - to run for, and be elected to, high office.

My worst habit used to be smoking but I quit.