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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. Examples include getting a haircut, melting ice, or dissolving sugar in water.

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What are products in a chemical reaction?

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Products are the substances that are formed as a result of a chemical reaction. They appear on the right side of a chemical equation.

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What type of reaction is fireworks?

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Fireworks are an EXOthermic reaction, meaning they release energy in the form of heat and light.

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What is a chemical change?

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A chemical change is a change that results in the formation of new chemical substances. Examples include rusting iron, burning wood, or souring milk.

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Where are reactants found in a chemical equation?

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Reactants are the starting substances in a chemical reaction and are found on the left side of a chemical equation.

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What does it mean if a reaction is endothermic?

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An endothermic reaction is a chemical reaction that absorbs energy from its surroundings, usually in the form of heat.

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

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A physical change affects the form of a substance but not its chemical composition, while a chemical change results in the formation of new substances.

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What is an example of a physical change?

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An example of a physical change is melting ice or getting a haircut.

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What is the role of coefficients in a chemical equation?

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Coefficients are numbers placed in front of the compounds in a chemical equation to indicate the number of molecules or moles of each substance involved in the reaction.

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What is the significance of subscripts in a chemical formula?

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Subscripts indicate the number of atoms of each element in a molecule. For example, in H2O, the '2' indicates there are two hydrogen atoms.