IGCSE U1 measurements and units

Approximations in physics are used to:

• a) Achieve precise measurements
• b) Simplify complex calculations
• c) Increase experimental accuracy
• d) Minimize experimental errors

Averages in physics are calculated by:

• a) Adding all values and dividing by the number of values
• b) Taking the highest value in a dataset
• c) Taking the median value in a dataset
• d) Adding all values and multiplying by the number of values

A beam balance is used to measure:

• a) Temperature
• b) Length
• c) Mass
• d) Volume

A barometer is a device used to measure:

• a) Atmospheric pressure
• b) Humidity
• c) Wind speed
• d) Temperature

A vector quantity has:

• a) Only magnitude
• b) Only direction
• c) Both magnitude and direction
• d) Neither magnitude nor direction

Density is defined as:

• a) Mass per unit volume
• b) Volume per unit mass
• c) Force per unit area
• d) Distance traveled per unit time

The displacement can is used to measure:

• a) Pressure
• b) Density
• c) Displacement
• d) Temperature

The standard international unit for length is the:

• a) Meter
• b) Kilogram
• c) Second
• d) Joule

The formula for calculating the volume of a sphere is:

• a) V = πr²
• b) V = 4/3πr³
• c) V = 2/3πr³
• d) V = 4πr²

A beam balance is a device primarily used to measure:

• a) Length
• b) Time
• c) Mass
• d) Temperature