Types of Measurements and Units
Volume is the amount of space occupied by an object or a material. Volume is said to be a derived unit, since the volume of an object can be
known from other measurements.
The volumes of solids are less affected by pressure and temperature changes than are the volumes of most liquids and all gases. In order to
find the volume of a solid you can calculate by using the formula: 𝑉 = 𝑙 · 𝑤 · 𝑑.
Another way is to determine the volume by water displacement. For example, a student wants to calculate the volume of an irregularly shaped
rock. To determine the volume, first add water to a graduated cylinder to a determined amount. Record the water level. Then, the student
places the rock in the cylinder. Record the new level of water in the cylinder. The water in the cylinder will rise by an amount equivalent to the
volume of the object. Subtract the final volume from the original volume. This is the volume of the rock.
Since liquids take the shape of the container in which they are placed, a liquid whose can simply be poured into a graduated cylinder. The
volume of liquids is only moderately affected by pressure.
The volume of gases is very much influenced by temperature and pressure. Since gases expand to fill any container into which they are
placed, the volume of the gas must always include an indication of the pressure and temperature under which that volume was measured.
We measure liquid [and often gases] volume in liters [L], or divisions of liters. We measure solid volume in [cubic centimeters] cm3.
Mass versus Weight Song. Mr. Edmonds. Watch the video from Mr. Edmonds explaining the difference between Mass and Weight. Read more:
Questions must be answered online at illuminatehc.com.
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What does volume measure?
a. The amount of space.
b. The amount of air.
What is the formula for measuring a regular solid?
a. V= 2𝜋𝑟
b. V= lwd
What is the method for measuring an irregular solid?
a. Using a ruler
b. Water displacement
How is the volume of a liquid affected by pressure?
a. Very much
b. Very little
What standard unit do we use for measuring volumes of
liquids?
a. inches
b. liter
What unit do we use for measuring volumes of solids?
a. pounds
b. cm3
What two indices affect gases a lot?
a. Temperature and pressure
b. Smell and color
What two indices must be indicated with the volume of a
gas?
a. Smell and color
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b. Temperature and pressure
Are mass and weight the same?
a. Yes
b. No
What instrument do we use to measure mass?
a. Scale
b. Balance
What instrument do we use to measure weight?
a. Balance
b. Scale
What units can we use to measure mass?
a. grams
b. Newtons
What unit do we use to measure weight?
a.
grams
b.
Newtons
What is the amount of stuff an object has?
a. Mass
b. Weight
What is the amount of pull of gravity on an object?
a. Mass
b. Weight