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BJU Physical World - Intro to Physical Science - Ch 3

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balance   An instrument for measuring mass.  
kilogram   The mass of a liter of water; 1000 grams.  
liter   The volume of a cubic decimeter.  
mass   The quantity of matter in an object.  
matter   Anything that has mass and volume.  
meter   The basic unit of length of the metric system; 39.37 inches.  
metric system   A decimal system of measurements based on the meter; SI  
SI   The abbreviation for the expanded metric system called Systeme International.  
units   Descriptive notes that accompany numbers.  
unit analysis   A mathematical tool for converting units.  
density   The mass in a unit of volume.  
law of mass conservation   In all chemical and physical changes, matter is neither created nor destroyed.  
meniscus   Curve seen at a liquid's surface, especially in a graduated cylinder.  
newtons   The metric unit of weight (N).  
second   The basic unit of time; 9,192,631,770 vibrations of cesium atom. (s)  
significant digits   All of the certain digits plus one doubtful digit in a measurement.  
spring scales   An instrument for measuring weight.  
volume   Any space defined by length, width, and height.  
water displacement method   Measuring the volume of an irregularly shaped object by submerging it in water contained in a graduated cylinder and taking before-and-after measurements.  
weight   The measure of the force of gravity on an object.  
scientific notation   Using the power of 10 to express very large or very small numbers.  


   


 

 

 

 

 

 
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