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A Graduated Cylinder is a measuring tool used for science to measureexact amounts of a liquid or chemical.

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A triple beam balance is a type of balance commonly used in thelaboratory to determine the mass (by weight comparison) of samples. Touse the balance, you use sliding weights… called riders on three beams, each with progressively small incremental amounts.

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Density is a measure of mass per volume. The average density of an object equalsits total mass divided by its total volume. An object made from a comparatively densematerial (such as iron) will have less volume than an object of equal mass made fromsome less dense substance (such as water).

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In scientific terms, volume is three-dimensional spaceoccupied by a gas, liquid or solid. Scientists measure volume in cubic units, such as liters, cubic meters, gallons and ounces. The most commonequation to find volume is mass divided by density.

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The quantity of matter in a body. The inertial mass is the mass as ameasure of resistance of a body to changes in its motion, and thegravitational mass is the mass as a measure of the attraction of one bodyto another. The general theory of relativity shows inertial and gravitationalmass are equivalent.

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The International System of Units (abbreviated as SI, from the French Système international (d'unités)) is the modern form of the metric system, and is the most widely used system of measurement. It comprises a coherent system of units of measurement built on seven base units.

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An experiment in which an observer tests a hypothesis by looking for changes brought on by alterations to a variable. In a controlled experiment, an independent variable is the only factor that is allowed to be adjusted, with the dependent variable as the factor that the independent variable will affect.

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Just like an independent variable, a dependent variable is exactly what it sounds like. It is something that depends on other factors. For example, a test score could be a dependent variable because it could change depending on several factors such as how much you studied, how much sleep you got the night before you took the test, or even how hungry you were when you took it. Usually when you are looking for a relationship between two things you are trying to find out what makes the dependent variable change the way it does.

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It is a variable that stands alone and isn't changed by the other variables you are trying to measure. For example, someone's age might be an independent variable.

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a supposition or proposed explanation made on the basis of limited evidence as a starting point for further investigation.

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The process of using one or more of your senses to cater information.

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The process of making an inference, an interpretation based on observation and prior knowledge.

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The ongoing process of discovery in science; the diverse ways in which scientists study  the natural world and propose explanations based on evidence they gather.