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Unit 1 Questions JK

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.
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Question
Answer
show Significant digits are the certain digits in a measurement as well as one uncertain digit which you have estimated.  
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show It is calculated by dividing the difference between the true value and the measured value by the true value and multiplying by 100. This takes human error into account, as humans can never be 100% accurate  
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show Record to the correct number of sig figs  
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show You may have one estimated digit  
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show They pertain to all measurements  
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show The number of sig figs is determined by the precision of the instrument  
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show When multiplying or dividing sig figs, the measurement with the fewest sig figs determines the number of sig figs in the answer  
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show Numbers with no uncertainty in their value, such as "a dozen" or "1"  
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How do you know how many sig figs to use in the answer when adding and subtracting sig figs?   show
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show If the last sig fig before the five is odd, round up. If the last sig fig before the five is even, round down. If the five is followed by non-zero digits, round up  
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show The rules of math must be adapted to handle quantities  
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show Only like quantities can be added and subtracted  
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show Units are important because they name the quantity measured  
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Why are the SI Units important to measurement?   show
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show A meter  
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What are the SI prefixes used in converting units?   show
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show The basic SI units do not describe all dimensions  
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show Area is the amount of surface something covers, and requires 2 dimensions to measure it  
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What is volume and why does it require derived quantities?   show
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show It makes interpretations easier to make  
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show Graphs are useful when portraying a proportional relationship  
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show A perfect curve or line rarely happens with real data; a best-fit line or equation can help make interpretations easier to make  
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What is the most common reason for uncertainty in measurements?   show
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What is a best-fit line?   show
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show The proportion between mass and volume m/v  
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show Graph the proportion m/v as the slope  
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How can you use graphs to find density?   show
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What are the properties of matter?   show
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show A change that produces a new kind of matter with different properties  
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How are physical changes different from chemical changes?   show
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show Baking soda and vinegar forming bubbles, liquid bleach cleaning stains  
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How are solids, liquids, and gasses different?   show
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How is the particle model for matter useful?   show
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show A substance with definite volume and shape  
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What is a liquid?   show
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What is a gas?   show
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What is a mixture?   show
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What is a pure substance?   show
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show Distillation, electrolysis, heat  
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show Distillation`  
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What are solutions?   show
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What happens to the solids dissolved in a solution?   show
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show Distillation  
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show Boiling point, freezing and melting point  
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show Pure substances have a constant melting and freezing point; mixtures do not  
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show Pure substances have a constant boiling point; mixtures do not.  
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show Electrolysis, heat  
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show Because if it conducts elecricity, electrolysis can be used  
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What is electrolysis?   show
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What does the electrolysis of water do?   show
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How are decomposition and distillation different?   show
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show If it can be decomposed further, it is a compound. If it can't, it is an element  
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What is an element?   show
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