Units of Matter Flashcards
Chemistry is the division of physical science that studies the _\_(3)__.
composition, properties, and reactions of substances
Define:
Energy
Energy is the ability to do work
Mass is the amount of matter in an object. The basic unit of mass is the _____.
kilogram
Name the three common tools for measuring mass:
- double pan balance
- triple beam balance
- electronic balance
One gram is the approximate mass of a 5-cm (2-inch) steel _____.
paper clip
The double pan balance compares the mass of a substance to a _____.
known standard mass (a metric weight)
The triple beam balance has _____ that are adjusted to balance the mass of the substance.
an arm with sliding mass units
The electronic balance provides a _____ of the mass of a substance.
digital measurement
One liter of water has a mass of _____ kilogram.
one
The amount of matter in a specified space is _____.
density
Define:
Weight
Weight is the pull of gravity on an object.
In many countries, the kilogram (kg) is commonly used to express weight. In science, kilogram is a metric unit of _____.
mass
The _____ is a metric unit of weight, and is defined as the force needed to accelerate 1 kilogram of mass at a rate of 1 meter per second per second (1 kg ∗ m/s2). Another unit of force is the _____.
newton, pound
One newton equals _____.
1 kg * m/sec2
One pound of force is about _____ newtons.
four
