positive

A piece of film with reversed colors for making prints

A way of thinking that is hopeful and looks for solutions

A result that is good or wanted

A hopeful, friendly feeling that makes people feel happy and active

Comments that praise or encourage someone's work

Clear proof that a person is who they say they are

A process where a small change causes larger changes in a system

An electrical state when an object has fewer electrons than protons

When one thing goes up or down, the other goes the same way

Having the Rh factor on the surface of red blood cells

An account that has more money in it than you have taken out

Something like praise or a reward that makes someone do something again

Part of economics that describes, explains, and predicts how the economy works without giving opinions

To hide facts or give false information on purpose to cheat someone

The end of a magnet that points north when the magnet hangs freely

A thing given after a behavior that makes it more likely to happen again

A battery terminal marked with a plus sign that connects to the red wire

A blood group whose red blood cells have the Rh factor, common in most people

Movement of a cell toward a stronger chemical signal

An adverb that shows a simple way something happens, not a comparison

The base form of an adjective or adverb that shows a quality without comparison

The end of a magnet that points toward the north when it hangs freely

A small particle with positive electric charge that turns into other tiny particles

Something pleasant that someone gives after a behavior to make it happen again

A word that shows how something is done without comparison