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Chemistry test 1

Terms in this set (24)

Matter
Anything that has mass and takes up space
Unit
A quantity that describes the measurement being made
significant figure
A digit in a measurement that contributes to the measurement's precision
weight
a measure of how strongly gravity pulls on an object
mass
a measure of how much matter exists in an object
Density
a measure of how tightly-packed the matter in a substance is
What are the base metric units used to measure length
meters
What are the base metric units used to measure mass
grams
What are the base metric units used to measure time
seconds
a measurement is 14.5mL. What is it trying to measure: length, mass, volume, or time?
volume, because of the mL
the volume of an object scale is marked off with lines meaning 10mL each. What level of precision should you report your measure?
report it to 1mL
an object has the mass of 123.4kg, which is the same as 8.456 slugs. Which has more mass: 1 slug or 1kg?
the slugs
measurement 1 is 1m'3 and measurement 2 is 1.23m'3. Which is the most accurate answer?
2 because it is more precise.
significant figures in 1.06 x 10'4mL?
3
significant figures in 12,000cm?
2
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