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

If we may believe our logicians, man is distinguished from all other creatures by the faculty of laughter. He has a heart capable of mirth, and naturally disposed to it.

You know why there's a Second Amendment? In case the government fails to follow the first one.

I talked to members of my family, and did some personal research that didn't really have anything to do with the time and place I was writing about, but that gave me a feeling of the experience of being black in a time and place where it was very difficult to be black.

Undoubtedly there are, in connection with each of these things, cases of fraud, swindling, and other financial crimes; that is to say, the greed and selfishness of men are perpetual.

My goal is to drop 10 projects in 2013. All albums. I gotta do it. I know the 10 projects I want to drop.

People will pay a price for putting political obstruction over progress in a time that is so critical and urgent.

The greatest gains and values are farthest from being appreciated. We easily come to doubt if they exist. We soon forget them. They are the highest reality.

Well, a special screening was set up for government officials, so they didn't have to see the experience of going to see the film. They certainly aren't going to the projects to see for themselves the situation.

Bringing GIS into schools gets the kids very excited and indirectly teaches them different components of STEM education. That's been illustrated at school after school.

If you are successful you will win false friends and true enemies. Succeed anyway.

I have always thought of myself as a performer first and way down the line as a recording artist.

There is nothing you can see that is not a flower; there is nothing you can think that is not the moon.

I'd love to have four or five kids.

It is the task of several months and it is a fact that a girl, either while rehearsing or actually playing, may be training for some character or feature in some future production not yet definitely fixed even in my own mind.

'The Importance of Being Earnest' is important, but it says nothing about anything.

I'd managed to bite a very large hole in the side of my tongue before they could pry my teeth apart. By all evidence, and there's no denying it, that thing I had on the set was a fit.

One of the wonderful things about Internet is it's like a salon. It brings people together from different intellectual walks of life.

People want to think that staying in shape costs a lot of money. They couldn't be more wrong. It doesn't cost anything to walk. And it's probably a lot cheaper to go to the corner store and buy vegetables than take a family out for fast food.

Being all about me is not a good thing - I don't care what 1978 tried to say - because as long as you mostly think about yourself, you're not going to be a wonderful person. You're just not.

You're creating an intimacy that everybody feels, that it's their experience, not yours. I'll never introduce a song and say, now this song is about 'my' broken heart.

The key to acting is less acting and just reacting.

Even as the population doubled from three to six billion, we managed to race ahead with all kinds of technological and scientific events in agriculture - from using more fertilizers to mechanization to advanced plant breeding.

This experience actually means the very opposite: the largest military power was unable to stop such a sensitive attack and will be unable to rule out such a possibility in the future. Precisely this is the background to the United States' military interventions.

Sometimes the most happy people in life are the ones with nothing. We can't lose sight of the little things in life that should make us the happiest.