the study of matter and the changes that it undergos

anything that has mass and takes up space

  a measurement that reflects the amount of matter

  the amount of matter that an object possesses

  a measure of the gravitational force exerted on an object

a systematic approach used in scientific study

  information that describes color, odor, shape, or some other physical characteristic

  data that describes the physical properties

  data that can be measured;

  examples include SI units-measurement, accuracy, and percision.

  a tentative explanation for what has been observed, is followed by an experiment to find out why this happened

a set of controlled observations that test the hypothesis

the variable that you plan to change

the variable whose amount changes in response to a change in the independent variable

  a standard for comparison

  it is usually set at 0 or is completely unchanged, something that would be found in nature

a judgement based on the information obtained in the experiment, states whether hypothesis was correct or not

a visual, verbal, and/or mathematical explanation of experimental data

an explanation that has been supported by many, many experiments

a relationship in nature that is supported by many experiments but there is no explanation for why it happens

units that are used in every country except for U.S.A.

a defined unit in a system of measurement that is based on an object or event in the physical world

  the SI unit for length, it is measured with a yard stick

the SI unit for mass, it is measured with a scale or triple-beam

a unit that is defined by a combination of base units ex: density=mass(g)/volume(l)

the SI unit for volume, is measured with water displacement for irregular shapes and geometry for regular shapes

  the ration of mass to volume in an object;

  the SI unit is g/cm3 (grams over cubic centimer);

  the gram represents volume and the cubic cintimeter represents mass

  the SI unit for temperature;

  add 273 to convert Celcius to Kelvin and subtract 273 to convert K to C

  measured with a thermometer

  writing a number so that it has only a tens place digitwise and will be multiplied to 10 with a power

  ex1; 12300x10(-3)=12.3

*3 is not being multiplied, it is used as an exponent

  ex2; 9.2561327x10(4)=92561.327

a ratio of equivalent values used to express the same quantity in different units

  changing kg to ml but not kg to l

  ex; 203kg=203000g

  a method of problem solving that focuses on the units used to describe matter

  to convert celcius to kelvin you focus on the relationship between the units

  how close a series of measured values are to to an accepted value or the true value

  how close a series of measurements are to one another

the ratio of an error to an accepted value

  the equation used to find this is percent error=(error/acceptedvalue) multiplied by 100

  the amount you have measured plus an extra digit

  ex; if measured 2.3 and 2.4 and 2.2, you may actually have gotten 2.35 and 2.48 and 2.21 and the number of significant figures in the measures are all 3

  the rules: (orange are significant)

1. non zero #s are always significant 72.3

2. zeros between numbers are always significant 60.5

3. all final zeros to the right of a decimal place are significant 6.20

4. zeros that act as a placeholder are not significant 0.0253 & 4320