Define the term compound measure .

A compound measure is something calculated using more than one measurement , e.g. speed is calculated using distance and time.

True or False? Flow rate is an example of a compound measure .

True. Flow rate is an example of a compound measure . It combines two measures (volume and time) by looking at the volume of fluid that moves over time, (e.g. cm 3 / s).

Define the term population density .

Population density is the measure of how many people there are per unit of area .

True or False? When using a formula triangle with a compound measure, you can add the two values at the base of the triangle to find the value at the top of the triangle.

False. When using a formula triangle with a compound measure, you need to multiply the two values at the base of the triangle to find the value at the top of the triangle.

True or false? Speed is the measure of how much distance changes per unit of time .

True. Speed is the measure of how much distance changes per unit of time .

Define the term density .

Density is the measure of how heavy something is per unit of volume or area .

True or False? Density is measured in Pascals (Pa) .

False. Pressure is measured in Pascals (Pa) . Density is measured in kg/m 3 .

What quantity could be measured with the units kg/cm 3 ?

The units kg/cm 3 could be used to measure density (mass per volume).

True or False? Speed is measured in kg/m .

False. Speed is measured in units like m/s or km/h .

IGCSEMathsCambridge (CIE)ExtendedFlashcards

Compound Measures (Speed, Density, Pressure) (Cambridge (CIE) IGCSE Maths)

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Define the term compound measure.
A compound measure is something calculated using more than one measurement, e.g. speed is calculated using distance and time.
True or False?
Flow rate is an example of a compound measure.
True.
Flow rate is an example of a compound measure.
It combines two measures (volume and time) by looking at the volume of fluid that moves over time, (e.g. cm³ / s).
Define the term population density.
Population density is the measure of how many people there are per unit of area.
True or False?
The units of a compound measure can be used to find the equation needed to calculate it.
True.
You can use the units of a compound measure to find the equation used to calculate it.
For example, speed is often measured in km / h.
Km (kilometres) is a measure of distance and h (hours) is a measure of time, so the calculation for speed is:
$Speed = \frac{Distance}{Time}$
True or False?
When using a formula triangle with a compound measure, you can add the two values at the base of the triangle to find the value at the top of the triangle.
False.
When using a formula triangle with a compound measure, you need to multiply the two values at the base of the triangle to find the value at the top of the triangle.
True or false?
Speed is the measure of how much distance changes per unit of time.
True.
Speed is the measure of how much distance changes per unit of time.
Define the term density.
Density is the measure of how heavy something is per unit of volume or area.
True or False?
Density is measured in Pascals (Pa).
False.
Pressure is measured in Pascals (Pa).
Density is measured in kg/m³.
What is the equation used to calculate speed?
The equation used to calculate speed is:
$Speed = \frac{Distance}{Time}$ .
What quantity could be measured with the units kg/cm³?
The units kg/cm³ could be used to measure density (mass per volume).
What is the equation used to calculate density?
The equation used to calculate density is:
$Density = Mass \div Volume$ .
True or False?
Speed is measured in kg/m.
False.
Speed is measured in units like m/s or km/h.
What is the equation used to calculate pressure?
The equation used to calculate pressure is:
$Pressure = Force \div Area$ .

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