1st 9 Weeks Review-6th Grade

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What are elements?

Back

Elements are pure substances that cannot be broken down into simpler substances by chemical means. Examples include K (Potassium), Cl (Chlorine), and N (Nitrogen).

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What happens to particles in an object at higher temperatures?

Back

At higher temperatures, particles in an object move faster due to increased energy.

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What is a physical change?

Back

A physical change is a change that affects one or more physical properties of a substance without altering its chemical composition. Examples include melting, freezing, and dissolving.

Front

What state of matter has molecules that are far apart and in constant motion?

Back

Gas.

Front

What is a conductor?

Back

A conductor is a substance that allows heat or electricity to flow through it easily. Examples include metals like copper and aluminum.

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What is a chemical change?

Back

A chemical change occurs when a substance transforms into a different substance with different properties. Examples include rusting and burning.

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What is an insulator?

Back

An insulator is a material that does not allow heat or electricity to flow through it easily. Examples include rubber and glass.

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What is the difference between a physical change and a chemical change?

Back

A physical change affects physical properties without changing the substance's chemical composition, while a chemical change results in the formation of new substances.

Front

What is the definition of a molecule?

Back

A molecule is a group of two or more atoms bonded together, representing the smallest fundamental unit of a chemical compound.

Front

What is the definition of temperature in relation to particle motion?

Back

Temperature is a measure of the average kinetic energy of the particles in a substance; higher temperatures indicate faster particle motion.