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16 Cards in this Set
- Front
- Back
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Mixture
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Physical combining and seperating
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Compound
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chemical combining and seperating. Usually exothermic
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Homogeneous Mixture
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Looks the same throughout. Most are solutions
ex salt and water |
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Heterogeneous Mixture
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looks different
ex. salt, sugar |
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Physical Change
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A solution that can be reversed. The properties remain.
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Chemical Change
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irreversible, new substance formed. Usually exothermic
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Nuclear Change
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New mass. Highly exothermic because mass is converted into energy.
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Energy
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Does work by creating motion, changing position,or by changing heat as a phase or temperature.
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Kinetic Energy
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motion, temperature
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Potential Energy
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position, phase, stored energy.
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Elements
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Nuclear combining and seperating
new atoms with new masses formed:exothermic |
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Matter
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occupies space, has mass
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Pure substance
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same properties throughout
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Law of Definite Proportion
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Compounds must have a definite proportion by mass of the elements in them.
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Law of Multiple Proportion
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Different compounds with the same elements must have a different proportion by mass of the elements in them.
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Which of the following fits into the category of a power loss?
A. Blackouts B. Spikes and surges C. Brownouts D. Surges |
Answer: A. A power outage, which can be called a blackout, is when power is lost for an extended time. The largest blackout ever to occur in the U.S. happened on August 14, 2003. It affected nearly 60 million people. A brownout occurs when power companies experience an increasingly high demand for power. Spikes are associated with power excesses.
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