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Week 8 Warm up 10/8/13 pg. 46-47

Week 8 Warm up 10/8/13 pg. 46-47. After a rainstorm there are puddles everywhere. Once the sun comes out the puddles start to disappear. Is this a physical or chemical change? Prove it. Describe what happens to the particles of a substance as it changes from a solid to liquid to gas.

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Week 8 Warm up 10/8/13 pg. 46-47

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  1. Week 8 Warm up 10/8/13pg. 46-47 After a rainstorm there are puddles everywhere. Once the sun comes out the puddles start to disappear. Is this a physical or chemical change? Prove it. Describe what happens to the particles of a substance as it changes from a solid to liquid to gas. What does it take for an object to freeze? What must be added to a substance to get it to go through vaporization?

  2. Week 8 Warm up 10/9-10/13pg. 46-47 • For each chemical listed below, list the formula for each element and how many atoms of each element are present. • H2O • Na2(SO4) • Mg3(CO2)4 • 2C6H12O6 • 3Ca3(CO3)4 • What is the difference between a molecule and an atom?

  3. Week 8 Warm up 10/11/13pg. 46-47 1. What is an element? 2. What is the smallest particle of an element? 3. Two or more atoms bonded together are called a(n) ___________________. 4. Two or more molecules bonded together are called a(n) _______________ . 5. How is a compound different from the elements that make it? 6. If salt is a compound made of Na(sodium) and Cl(chlorine), what must be true about salt compared to Na and Cl? 7. What is the difference between endo and exothermic?

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