BJU Physical World - Intro to Physical Science - Ch 3
Question
Answer
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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