Physical Science Practice

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What is an element?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means. Each element is made up of atoms that have the same number of protons.

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What is a mixture?

Back

A mixture is a combination of two or more substances where each substance retains its own properties. Mixtures can be separated by physical means.

Front

What is a solution?

Back

A solution is a special type of mixture where one substance (the solute) is dissolved in another (the solvent), resulting in a homogeneous mixture.

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What is filtration?

Back

Filtration is a physical process used to separate solids from liquids or gases using a filter medium that allows only the fluid to pass through.

Front

What is an insulator?

Back

An insulator is a material that does not conduct heat or electricity well. Wool is an example of a good insulator.

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What is a conductor?

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A conductor is a material that allows heat or electricity to flow through it easily. Metals like copper are good conductors.

Front

What happens to temperature when an insulator is used?

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Using an insulator helps to maintain the temperature of a substance by reducing heat loss.

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What is a physical change?

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A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition.

Front

What is a chemical change?

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A chemical change occurs when a substance transforms into a different substance with different properties, often involving a chemical reaction.

Front

What is the role of temperature in heat transfer?

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Temperature is a measure of the average kinetic energy of particles. Heat transfer occurs from areas of higher temperature to areas of lower temperature.