Unit One Exam Two Practice Exam

In a heterogeneous mixture, the substances

• Can be physically separated

• Are chemically combined

• Can only be separated through chemical processes

• Break down into new substances

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MS-PS1-8

MS-PS1-2

Which of the following statements is true?

• A solution is a pure substance

• A solution is a mixture

• The solvent dissolved in the solute

• A solution has the same properties as a colloid

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MS-PS1-8

MS-PS1-2

Click the correct answers in this sentence from the drop down menu: Milk and sugar water are both ​ (a)   . However milk is a ​ (b)   and sugar water is a ​ (c)   .

• mixtures
• pure substances
• colloid
• suspension
• solution

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MS-PS1-8

MS-PS1-2

Ethylene glycol is a solute that is dissolved in water and used in de-icing fluid for airplanes and other vehicles. What do we know changes when a solute is added making ethylene glycol a good de-icer.

Tags

MS-PS1-8

MS-PS1-2

What are the two properties we talked about in class that affect solubility in a solution?

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MS-PS1-8

Which of the following is an example of a chemical change?

• Breaking a rock into smaller pieces

• Burning a candle

• Stirring butter and sugar together

• Adding food coloring to water

Tags

MS-PS1-2

In general, what happens to the rate of reaction when you decrease the temperature of a chemical reaction?

• It decreases

• It increases

• It is unaffected

• It increases, then immediately decreases

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MS-PS1-2

Burning a log is an example of what?

• An endothermic reaction

• A solution

• A catalyst

• An exothermic reaction

Click the correct answer in this sentence from the drop down menu: All chemical changes result in ​ (a)  

• new substances
• pure substances
• a reversible substance
• a heterogeneous mixture only
• a homogeneous solution only

Tags

MS-PS1-2

Milk contains bacteria that carry out chemical reactions to live and reproduce. Why is milk stored in the refrigerator? What do we know temperature does to the rate of reaction?

Tags

MS-PS1-2