Measurement and Laboratory Safety - MCQs

A scale on a measuring device has 10 small divisions between 3.3 and 3.4. What value does each small division represent?

• 0.01

• 0.1

• 0.001

• 1.0

If a red line goes slightly past 3.3 but halfway before 3.4, what is the best estimated reading?

• 3.30

• 3.35

• 3.40

• 3.45

Increasing the number of markings on a measuring device will:

• Decrease accuracy

• Increase precision

• Make it harder to read

• Have no effect

Which of the following is the SI unit of mass?

• Gram (g)

• Kilogram (kg)

• Pound (lb)

• Tonne (t)

Mass is defined as:

• The weight of an object on Earth

• The amount of matter contained in a body

• The volume of a body

• The heaviness of an object

Which instrument is commonly used to measure mass in schools?

• Thermometer

• Beam balance

• Stopwatch

• Barometer

The SI unit of time is:

• Minute

• Hour

• Second

• Day

People in rural Ethiopia sometimes measure time using:

• Digital watches

• Position of the sun

• Pendulum clocks

• Sand timers

Which of the following is NOT a laboratory safety rule?

• Always wear safety goggles

• Never work alone in the laboratory

• Wear open-toed shoes for comfort

• Avoid bulky jewelry while working

Why are laboratory safety rules important?

• To make experiments faster

• To ensure systematic and safe discovery in science

• To decorate the lab with posters

• To make students wear uniforms