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      <title>questions about mixtures, properties of materials, chemical and physical changes by Jesús Zárate</title>
      <link>https://padlet.com/jesus_zarate/dvw1xm8qiwo3</link>
      <description>a challenge for you</description>
      <language>en-us</language>
      <pubDate>2017-12-13 12:58:51 UTC</pubDate>
      <lastBuildDate>2017-12-13 13:10:46 UTC</lastBuildDate>
      <webMaster>hello@padlet.com</webMaster>
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      <item>
         <title>Properties of Matter</title>
         <author>jesus_zarate</author>
         <link>https://padlet.com/jesus_zarate/dvw1xm8qiwo3/wish/215761573</link>
         <description><![CDATA[<div>1.  Three states of matter are <em>                        </em>.</div><div><br>a.       solid, liquid, and gas<br><br></div><div><br>b.      buoyancy, mass, shape<br><br></div><div><br>c.       gas, liquid, and mixture<br><br></div><div><br>d.      density, weight, and gas<br><br></div><div> </div><div>2.  The particles of matter making up a <em>               </em>are packed together tightly.</div><div><br>a.       piece<br><br></div><div><br>b.      liquid<br><br></div><div><br>c.       gas<br><br></div><div><br>d.      solid<br><br></div><div>3. The temperature at which a substance changes from a solid to a liquid.</div><div><br>a.       boiling point<br><br></div><div><br>b.      melting point<br><br></div><div><br>c.       pure substance<br><br></div><div> </div><div>4. Which would cause liquid water to change to a solid?</div><div><br>a.       warming<br><br></div><div><br>b.      heating<br><br></div><div><br>c.       freezing<br><br></div><div><br>d.      dripping<br><br></div><div>5. How can a liquid become a solid?</div><div><br>a.       By something removing heat from it and slowing down the particles.<br><br></div><div><br>b.      By something removing heat from it and speeding up the particles.<br><br></div><div><br>c.       By something adding heat to it and slowing down the particles.<br><br></div><div><br>d.      By something adding heat to it and speeding up the particles.<br><br></div><div> </div><div>6. A SOLID is all matter that has a shape of its own.</div><div><br>a.       True<br><br></div><div><br>b.      False<br><br></div><div>7. Which state of matter is easily compressed and easily changes shape to fill its container?</div><div><br>a.       solid<br><br></div><div><br>b.      liquid<br><br></div><div><br>c.       gas<br><br></div><div><br>d.      plasma<br><br></div><div> </div><div>8. An example of a gas is</div><div><br>a.       chocolate syrup<br><br></div><div><br>b.      a rock<br><br></div><div><br>c.       pencils<br><br></div><div><br>d.      helium<br><br></div><div>9. What type of substance can be poured and takes the shape of its container?</div><div><br>a.       Liquid<br><br></div><div><br>b.      Gas<br><br></div><div><br>c.       Solid<br><br></div><div><br>d.      Plasma<br><br></div><div> </div><div>10. Sand is a liquid because it takes the shape of its container.</div><div><br>a.       True<br><br></div><div><br>b.      False<br><br></div><div>11. Sublimation is when a <em>               </em> changes directly to a <em>               </em>.</div><div><br>a.   solid, liquid<br><br></div><div><br>b.   gas, liquid<br><br></div><div><br>c.    plasma, gas<br><br></div><div><br>d.   solid, gas<br><br></div><div> </div><div>12. Is plasma a state of matter?</div><div><br>a.   yes<br><br></div><div><br>b.   no<br><br></div>]]></description>
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         <pubDate>2017-12-13 13:01:29 UTC</pubDate>
         <guid>https://padlet.com/jesus_zarate/dvw1xm8qiwo3/wish/215761573</guid>
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      <item>
         <title>Mixtures</title>
         <author>jesus_zarate</author>
         <link>https://padlet.com/jesus_zarate/dvw1xm8qiwo3/wish/215762661</link>
         <description><![CDATA[<div>1. A mixture consists of two or more elements or compounds that are chemically combined, not physically mixed.</div><div><br>a.   True<br><br></div><div><br>b.   False<br><br></div><div> </div><div>2. In a mixture, components lose their properties to form a new substance.</div><div><br>a.   True<br><br></div><div><br>b.   False<br><br></div><div>3. Both of these foods would be classified as a homogeneous mixture.</div><div><br>a.   Chicken noodle soup and fudge ripple ice cream<br><br></div><div><br>b.   Soda pop and chocolate ice cream<br><br></div><div><br>c.    Rocky road ice cream and an orange<br><br></div><div><br>d.   Watermelon and spaghetti with meatballs<br><br></div><div> </div><div>4. What type of mixture will not allow light to pass through?</div><div><br>a.   Suspension<br><br></div><div><br>b.   Colloid<br><br></div><div><br>c.    Solution<br><br></div><div><br>d.   Mixture<br><br></div><div>5. A mixture of two or more uniformly dispersed substances is a(n)</div><div><br>a.   Colloid<br><br></div><div><br>b.   Solution<br><br></div><div><br>c.    Suspension<br><br></div><div> </div><div>6. A liquid mixture in which particles can be seen and easily separated by settling or filtration is a</div><div><br>a.   solution<br><br></div><div><br>b.   suspension<br><br></div><div><br>c.    solvent<br><br></div><div><br>d.   solute<br><br></div><div>7. A solution which holds a higher concentration of a solute than is normally possible at a certain temperature and pressure is called a <em>               </em>.</div><div><br>a.   solute<br><br></div><div><br>b.   solvent<br><br></div><div><br>c.    supersaturate<br><br></div><div><br>d.   mixture<br><br></div><div> </div><div>8.  is the substance in a solution that dissolves.</div><div><br>a.   Filtration<br><br></div><div><br>b.   Solute<br><br></div><div><br>c.    Solvent<br><br></div><div>9. What is the definition of a solvent?</div><div><br>a.   The substance that is dissolved.<br><br></div><div><br>b.   The substance in which the solute is dissolved.<br><br></div><div><br>c.    Unable to be dissolved.<br><br></div><div> </div><div>10. What is often called the universal solvent?</div><div><br>a.   sodium chloride<br><br></div><div><br>b.   oxygen<br><br></div><div><br>c.    sodium<br><br></div><div><br>d.   water<br><br></div><div>11. If a material's composition varies from region to region it can be classified as</div><div><br>a.   homogeneous<br><br></div><div><br>b.   heterogeneous<br><br></div><div> </div><div>12. A suspension is composed of substances that are evenly among each other.</div><div><br>a.   True<br><br></div><div><br>b.   False<br><br></div><div> <br><br></div>]]></description>
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         <pubDate>2017-12-13 13:05:01 UTC</pubDate>
         <guid>https://padlet.com/jesus_zarate/dvw1xm8qiwo3/wish/215762661</guid>
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      <item>
         <title>Physical vs. Chemical Change</title>
         <author>jesus_zarate</author>
         <link>https://padlet.com/jesus_zarate/dvw1xm8qiwo3/wish/215763756</link>
         <description><![CDATA[<div>1. The formation of rust is a <em>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</em>change.</div><div><br>a. &nbsp; physical<br><br></div><div><br>b. &nbsp; chemical<br><br></div><div>&nbsp;</div><div>2. Evaporation of water is a <em>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</em>change.</div><div><br>a. &nbsp; physical<br><br></div><div><br>b. &nbsp; chemical<br><br></div><div>3. Tearing paper in strips is a <em>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</em>change.</div><div><br>a. &nbsp; physical<br><br></div><div><br>b. &nbsp; chemical<br><br></div><div>&nbsp;</div><div>4. A firecracker popping is a <em>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;</em>change.</div><div><br>a. &nbsp; physical<br><br></div><div><br>b. &nbsp; chemical<br><br></div><div>5. Which is an example of a chemical change?</div><div><br>a. &nbsp; A balloon is blown up.<br><br></div><div><br>b. &nbsp; Ice melts.<br><br></div><div><br>c.&nbsp; &nbsp; Paper burns.<br><br></div><div><br>d. &nbsp; A metal pan heats on the stove.<br><br></div><div>&nbsp;</div><div>6. Which is an example of a physical change?</div><div><br>a. &nbsp; Metal rusting.<br><br></div><div><br>b. &nbsp; Silver tarnishing.<br><br></div><div><br>c.&nbsp; &nbsp; Water boiling.<br><br></div><div><br>d. &nbsp; Paper burning.<br><br></div><div>7. Burning a match is an example of a</div><div><br>a. &nbsp; chemical change.<br><br></div><div><br>b. &nbsp; physical change.<br><br></div><div><br>c.&nbsp; &nbsp; chemical property.<br><br></div><div><br>d. &nbsp; physical property.<br><br></div><div>&nbsp;</div><div>8. Which of the following is an example of a physical change?</div><div><br>a. &nbsp; Mixing baking soda and vinegar together, and this causes bubbles and foam.<br><br></div><div><br>b. &nbsp; A glass cup falls from the counter and shatters on the ground.<br><br></div><div><br>c.&nbsp; &nbsp; Lighting a piece of paper on fire and the paper burns up and leaves ashes.<br><br></div><div><br>d. &nbsp; Baking a birthday cake for your mother<br><br></div><div>9. Which of the following is an example of a chemical change?</div><div><br>a. &nbsp; Filling up a balloon with hot air.<br><br></div><div><br>b. &nbsp; Taking a glass of water and freezing it by placing it in the freezer.<br><br></div><div><br>c.&nbsp; &nbsp; A plant collecting sunlight and turning it into food.<br><br></div><div><br>d. &nbsp; Your dog ripping up your homework.<br><br></div><div>&nbsp;</div><div>10. Describe what the difference is between a physical change and a chemical change.&nbsp;<br>&nbsp;<br>&nbsp;<br>&nbsp;<br><br></div>]]></description>
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         <pubDate>2017-12-13 13:08:47 UTC</pubDate>
         <guid>https://padlet.com/jesus_zarate/dvw1xm8qiwo3/wish/215763756</guid>
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