science test on friday
Terms
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- standard measurement
- kelvin scale (celcious)
- weight
- measures the force of gravity acting an object
- deka
- 10
- accuracy and precision important when making measurements
- then you can feel confident about your answer and that it is right
- instrument is used to measure liquid
- graduated cylender
- meniscus
- the curve of liguid , the bottom of thecurve is the measurement
- why do scientists use a standard measurement system
- minimizes confusion among scientists
- si stand for
- international system of units
- volume
- the amount of space and object takes up
- allow scientists to do
- allows scientists to compare data and communicate with each other about their results
- 2 measurements density
- mass and volume
- accuracy
- how close a measurement is to a true or accepted value
- measures volume of liquid
- liters
- density
- how much mass is contained in a given volume
- mesure temp.
- thermometer
- absolute zero
- coldest ever
- basic unit of mass
- kilogram
- percent error
- determines how accurate or close to the true value an experimental value really is
- median
- smallest to largest add #s of entries is middle # even # take 2 middle addd them and divide by 2
- irregular solids
- put them in water and see how much the water moves up
- precision
- how close a group of measurements are to each other
- milli
- .001
- estimate
- an approximation of a number based on a reasinable assumption
- rectangular solid
- legth times width times height
- mean
- add up all the numbers then divide by number
- conversion factor
- an equation that shows how 2 units of measurement are related
- centi
- .01
- deci
- .1
- hecto
- 100
- si unit to measure time
- seconds
- length
- the distance from one point to another
- si measure
- length,volume,mass,density,temperature,time
- sciebtists prefer to use mass or weight when making measurements
- mass
- mass
- a measure of the amount of matter an object contains
- mode
- the number that appears most often
- basic unit of length
- meters
- system of measurements based on tens
- metric system
- kilo
- 1000