Chemistry Unit Test
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Homogeneous mixtures are also known as... | Solutions
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| The definition of matter says that it must occupy space. What is the other requirement? | mass
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| What kind of change occurs when iron is melted? | physical
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| Heterozygous means.. | same
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| homozygous means | different
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| Volume equation? | V=LxWxH
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| Scientific notation for 2500? | 2.5 x 10^3
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| Whats giga's (G) prefix? | 10^9
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| Mega (M)? | 10^6
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| Kilo (K) | 10^3
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| Deci (d)? | 10^-1
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| Centi(c)? | 10^-2
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| Milli (m) | 10^-3
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| Density is.. | mass/volume or D=M/V
Density also is .. grams/cubic cm or g/cm^3 or g/mL
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| Equation for % error? | difference/ accepted value x100
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| Significant Figures or sig figs | All digits 1-9 are significant, certain 0's are place holders
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| When adding sig figs you. | Find the smallest number and however many places come after that smallest number is how many you use in your answer.
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| When multiplying sig figs you.. | You count the total number of sig figs and your answer can only have that of the smallest number.
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| What are the four states of matter? | Solid, Liquid, Gas, and Plasma
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| What is the "Law Conversion of Mass"? | matter is neither created nor destroyed in a chemical reaction.
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| What are elements? | They are made of only one type of atom, can't be broken down, and 90% of the elements occur naturally on earth.
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| Compounds | Pure and are made when atoms bond together, or two or more elements are chemically added together.
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| Base Units are? | Units of measure based on objects in the physical world.
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| Heterogeneous Matter | -Poorly mixed, clumpy
-CAN be separated
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| Homogeneous Matter | -Formed from two or more compounds.
-Mixed together well
-Appears the same everywhere
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| Solutions occur when | A solute gets added to a solvent.
ex. Kool-Aid
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| Derived Unit | A unit of measure that is based on a combination of base units.
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| Distilled water is an example of what? | A compound
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| 4 clues that a chemical change has occurred are? | -New Color
-New Odor
-Bubbling
-A precipitate
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| what is a precipitate? | a solid appears cloudy.
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| Endothermic | Absorbs heat (cold)
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| Exothermic | Releases heat (hot)
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| Physical Properties | Easily identifiable things like: color, density, smell, hardness.
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| A symbol for volume could be: | mL
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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