Chemical reactions and more

An object, diagram, or computer program that helps us understand something by making it simpler or easier to see

• directions

• property

• model

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NGSS.MS-PS1-5

NGSS.MS-LS1-2

A process in which atoms rearrange to form new substances.

• Physical change

• periodic table

• chemical reaction

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During a chemical reaction, atoms can

• be destroyed to form a new substance

• be created to form a new substance

• be rearranged to form a new substance

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NGSS.MS-PS1-5

A chemical change is different than a physical change because in a chemical change

• chemicals are used

• molecules do not physically touch

• a new substance is formed and in a physical no new substance is formed

• the change can be seen but in a physical change it cannot

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How many Carbons are present on the reactant side?

• 1

• 2

• 3

• 4

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How many Hydrogens are on the product side of this chemical equation?

• 1

• 2

• 3

• 4

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NGSS.MS-PS1-5

How many Oxygens are on the product side of this chemical equation?

• 1

• 2

• 3

• 4

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Is this chemical equation balanced? Why or why not? Choose the BEST answer.

• Yes, the amount of atoms for each element are equal on both the reactant and product side.

• No, the carbons are not the same number on both the reactant and product side.

• No, neither the carbons or hydrogens are the same amount on both the reactant and product side.

• No, none of the elements (carbon, hydrogen, or oxygen) are the same amount on both the reactant and product side.

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In a chemical reaction, ________________________ are changed into _______________________.

• Reactants; Products

• chemicals; atoms

• Coefficients; Subscripts

• Original Elements; New Elements

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NGSS.MS-PS1-5

Measure of the amount of matter 

• mass
• volume
• weight
• density