Chemical reactions recap

A chemical reaction is a change that results in the formation of one or more new substances

• true

• false

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NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is a factor that affects the rate of reaction

• particle size

• gender

• pH

the reactants of a chemical equation...

• are the products produced

• start a chemical reaction

• not involved in chemical reactions.

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NGSS.MS-PS1-5

chemical reactions can be represented in word and chemical equations

• true

• false

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

exothermic reactions...

• take in energy as heat

• produce no energy

• give out energy as heat

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-5

endothermic reactions

• produce no energy

• take in energy as heat

• give out energy as heat

Tags

NGSS.MS-PS3-3

NGSS.MS-PS3-4

the larger the particle size the

• faster the reaction will be

• slower the reaction will be

in the law of conservation of mass when a chemical reaction occurs

• the total mass of reactants and products are equal to eachother

• the total mass of reactants and products are different to eachother

• no effect on mass of reactants and prodcuts

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

which change is generally reversible

• physical change

• chemical change

in a chemical change a new substance is formed

• true

• false

Tags

NGSS.MS-PS1-2