What does variable mean in science?

A variable is a quantity which is capable of taking on different values. If you count the number of marbles in a jar and then add a few more, that will be one variable. However, if you put the same number of red, white and blue marbles in another jar, you have two variables the number of red marbles and the number of blue marbles. The same goes for temperature, time, distance, etc — these are all examples of variables.

What does variable mean in physics?

variable refers to the property of something which can take on different values. A variable is a property which can vary in one or more dimensions. A variable can be continuous or discrete. A continuous variable can take any value between two limits, whereas a discrete variable has a specific set of values.

What does variable mean in chemistry?

A variable refers to a property that can take on different values. For example, the density of water at different temperatures is a property of water that can take on different values. If the density of water is greater at higher temperatures, then the density is a variable. In this instance, a variable refers to the property of density.

What does variable mean in biology?

A variable is a measurable quantity that can take on different values. In other words, a variable is something that can vary, change, or be different from one instance to the next. If you were to measure the length of a tree, for example, the length of the tree would be a variable. Since the tree's length could not possibly be set at a specific length, it is a variable.

What does variable mean in astronomy?

Variable stars are those whose light output changes over time. We observe these objects at night using telescopes, and measure the change in their brightness. A variable star can vary by up to a few percent in brightness. Other variables have larger variations. For example, a red variable star can get 30 percent brighter or fade 30 percent, or an eclipsing binary can change from one bright state to two much fainter states or back again.