Intro to Chemistry

What does the Law of Conservation of Mass/Matter State?

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What is Chemistry the study of?

• ...all biotic factors.

• ...natural history.

• matter/mass, atoms, chemicals, elements.

• trashcans.

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Who is the scientist who is credited with proving the Law of Conservation of Mass/Matter?

• Fredrick Durst

• Sir Jonathan Davis

• Antonio Bandaras

• Antoine Lavoisier

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The _________ are the inputs in a chemical reaction.

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There are two types of chemical reactions that change matter either chemically or physically, what are these two reactions called?

• Coherent

• Endothermic

• Exothermic

• Epidermis

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What was Antoine Lavoisier's day job?

• Tax Collector for the King

• Wealthy Landowner

• Chemist

• Biologist

If sugar is mixed with water, would this cause a physical change or a chemical change? Explain your reasoning using evidence.

• chemical change because we changed the substance chemically.

• physical change because it is.

• chemical change because we cannot revert back into water and sugar.

• physical change because we can revert it back to water and sugar by adding heat.

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After a reaction has occurred the outputs are called the ________.

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If salt is mixed with water, would this cause a physical change or a chemical change? Explain your reasoning using evidence.

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Explain what you would see during a chemical reaction that would indicate that a chemical change has occurred.

• formation of gas/vapor

• change in color

• extreme change in temperature

• change in odor

• forms a precipitate

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