Qs: Physical Properties & Density

Front

What is density?

Back

Density is a characteristic property of matter defined as mass per unit volume. It is usually expressed in grams per cubic centimeter (g/cm³).

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How do you calculate density?

Back

Density = Mass / Volume. For example, if an object has a mass of 10 grams and a volume of 2 cm³, its density is 5 g/cm³.

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What is a physical property?

Back

A physical property is a characteristic of a substance that can be observed or measured without changing its identity, such as color, mass, volume, and density.

Front

What is the difference between mass and weight?

Back

Mass is the amount of matter in an object, measured in grams or kilograms, while weight is the force exerted by gravity on that mass, measured in newtons.

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What happens to the density of an object if its mass increases but its volume remains the same?

Back

If the mass increases while the volume remains the same, the density of the object increases.

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What is a characteristic property of matter?

Back

A characteristic property is a property that remains the same regardless of the amount of substance present, such as density.

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Why do liquids form layers when mixed?

Back

Liquids form layers when mixed due to differences in density; the less dense liquid will float on top of the denser liquid.

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What is thermal conductivity?

Back

Thermal conductivity is a measure of a material's ability to conduct heat. Materials with high thermal conductivity transfer heat quickly.

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Give an example of a substance with high density.

Back

Lead is an example of a substance with high density, approximately 11.34 g/cm³.

Front

What is the significance of a substance's boiling point?

Back

The boiling point is the temperature at which a substance changes from a liquid to a gas, and it is a characteristic property of that substance.