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41 Cards in this Set
- Front
- Back
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What are the steps in the scientific method?
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-Observations
-Hypothesis -Experiments -Conclusion |
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What is the difference between qualitative data and quantitative data?
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-Qualitative=discriptions
-Quantitative=numbers |
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What is the difference between an independent variable and a dependent variable?
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The independent variable is changed, and the dependent variable is what changes because of the independent variable.
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What is the control in an experiment?
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The control is an unchanged part of an experiment.
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What is a theory and what is a scientific law?
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A theory is an conclusion based on many observations and investigations over time, and a law is supported by many experiments.
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Mega
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10^6
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Kilo
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10^3
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Deci
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10^-1
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Centi
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10^-2
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Milli
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10^-3
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Micro
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10^-6
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Nano
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10^-9
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What is the equation for converting Kelvin to Celsius or vice versa?
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K=C+273, C=k--273`
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What is density?
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A physical property of matter
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What is the density equation?
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D=m/v
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What is the difference between accuracy and precision?
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Accuracy refers to how close a measured value is to an accepted value, and precision refers to how close a series of measurements are to one another.
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What is the percent error equation?
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Percent error=experimental value--accepted value/accepted value x 100
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What numbers are significant?
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-nonzero numbers
-zeros between nonzero numbers -all final zeros to right of decimal -not placeholder zeros |
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Why do we use sig figs?
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Because they tell us how precise the instrument we used is
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When multiplying and dividing the answer must have the same number of sig figs as the...
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Least precise measurement
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When adding and subtracting the answer must have the same number of sig figs as the...
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Smallest decimal place
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If number you are rounding is >5, what do you round to?
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You round up
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If number you are rounding is <5, what do you round to?
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You round down
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If number you are rounding is =5, what do you round to?
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You round up if odd, down if even
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What is chemistry?
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The study of matter
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What is the difference between accuracy and precision?
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Accuracy refers to how close a measured value is to an accepted value, and precision refers to how close a series of measurements are to one another.
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What is the percent error equation?
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Percent error=experimental value--accepted value/accepted value x 100
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What numbers are significant?
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-nonzero numbers
-zeros between nonzero numbers -all final zeros to right of decimal -not placeholder zeros |
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Why do we use sig figs?
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Because they tell us how precise the instrument we used is
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When multiplying and dividing the answer must have the same number of sig figs as the...
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Least precise measurement
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When adding and subtracting the answer must have the same number of sig figs as the...
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Smallest decimal place
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If number you are rounding is >5, what do you round to?
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You round up
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If number you are rounding is <5, what do you round to?
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You round down
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If number you are rounding is =5, what do you round to?
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You round up if odd, down if even
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What is chemistry?
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The study of matter
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What is the difference between mass and weight?
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Mass=stuff, weight=force of gravity
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What is the density of water?
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D=1g/1mL(or cm^3)
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Name five rules for the chemistry lab?
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-Wear goggles
-Wear aprons -Closed-toed shoes -Pick up/open bottle put hand on label side -Wash hands after each lab |
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Wear are the fire extinguishers?
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-By door, prep room, behind files
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Name three safety devices?
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-Eyewash
-Fire Blanket -Emergency shower |
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Name five pieces of glassware?
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-Beaker
-Graduated cylinder -Stirring rod -Erlenmeyer flask -?? |
