Unit Test — Unit test Answers
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The graph below compares the rates of reaction of a burning candle and an exploding firework.What can you conclude from the graph?
A
The reaction that causes a firework to explode requires less energy to start, and occurs more rapidly than the reaction that causes a candle to burn.B
The reaction that causes a firework to explode requires less energy to start, and occurs less rapidly than the reaction that causes a candle to burn.C
The reaction that causes a firework to explode requires more energy to start, and occurs less rapidly than the reaction that causes a candle to burn.D
The reaction that causes a firework to explode requires more energy to start, and occurs more rapidly than the reaction that causes a candle to burn.22
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The diagram shows a type of lipid.Which type of lipid is shown?
A
a saturated phospholipidB
a saturated triglycerideC
an unsaturated phospholipidD
an unsaturated triglyceride23
Which statement best describes the relationship between activation energy and rate of reaction?
A
Increasing the activation energy can increase the rate of a reaction.B
Reducing the activation energy can increase the rate of a reaction.C
Increasing the reaction energy does not alter the rate of reaction.D
Reducing the activation energy can decrease the rate of a reaction.24
A scientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas. Which group of statements best describe all of the materials he is using in the investigation?
A
They are each compounds. Each of the compounds is made of atoms. All of the atoms are made of matter.B
They are each made of matter. Some are compounds and some are elements. They all contain atoms.C
They are all elements. Some contain molecules of the same type of atom. Some contain different types of atoms.D
They are each made of matter. Some are compounds made of one type of element. Some are pure atoms.25
Which term describes a pure substance that is made up of only one type of atom?
A
matterB
rockC
compoundD
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