Density is defined as the mass per unit volume of a material. It describes how much mass is contained in a given volume.

True or False? Objects made from high-density materials typically have low mass .

False. Objects made from high-density materials typically have a high mass.

When an irregular object is fully submerged, the volume of water it ______ is equal to the volume of the object.

When an irregular object is fully submerged, the volume of water it displaces is equal to the volume of the object.

State the units for density when mass is in grams ( g ) and volume is in cubic centimetres ( cm³ ).

The units for density are grams per cubic centimetre (g/cm³) when mass is measured in grams (g) and volume in cubic centimetres (cm³).

When measuring the density of a liquid, how do you find the mass of the liquid ?

Subtract the mass of the empty measuring cylinder from the mass of the cylinder with the liquid in it. Mass of liquid = mass of cylinder with liquid − mass of empty cylinder

Why are gases generally less dense than solids?

Gases are generally less dense than solids because the molecules in a gas are more spread out over a larger volume.

Which instrument would you use to measure the dimensions of a very small object most accurately?

A micrometer , which measures objects around 3 cm in length with a resolution of 0.001 mm. A ruler (up to 30 cm) or Vernier calipers (around 15 cm) are used for larger objects.

True or False? Density is a scalar quantity.

True. Density is a scalar quantity.

True or False? Water should be poured into the measuring cylinder while it is on the digital balance.

False. Water should not be added while the cylinder is on the balance, as a spill onto the electric balance could cause an electric shock .

Volume is the amount of space occupied by an object in three-dimensional space.

Why should you repeat your measurements and take an average in this experiment?

Repeating measurements and taking an average reduces the effect of random errors , giving a more reliable result.

O LevelPhysicsCambridge (CIE)Flashcards1. Motion, Forces & Energy1.4 Density

1.4 Density (Cambridge (CIE) O Level Physics): Flashcards

Exam code: 5054

1/16

0Still learning

Know0

FrontDensity
Define density.

Was this flashcard helpful?

Cards in this collection (16)

Define density.
Density is defined as the mass per unit volume of a material. It describes how much mass is contained in a given volume.
How do you measure the density of a regularly shaped object?
Measure its mass using a digital balance, and measure its dimensions using a ruler, Vernier calipers or micrometer.
Calculate its volume from its shape, then find the density using:
$ρ = \frac{m}{V}$
True or False?
Objects made from high-density materials typically have low mass.
False.
Objects made from high-density materials typically have a high mass.
How do you measure the density of an irregularly shaped object?
Measure its mass using a digital balance.
Lower it into a displacement (eureka) can and collect the overflowing water in a measuring cylinder. Measure the volume of this water, then find the density using:
$ρ = \frac{m}{V}$
What is the equation for the density of an object?
The equation for density is $ρ = \frac{m}{V}$
Where:
- ρ = density, measured in kg / m³
- $m$ = mass, measured in kilograms (kg)
- $V$ = volume, measured in metres cubed (m³)
When an irregular object is fully submerged, the volume of water it ______ is equal to the volume of the object.
When an irregular object is fully submerged, the volume of water it displaces is equal to the volume of the object.
State the units for density when mass is in grams (g) and volume is in cubic centimetres (cm³).
The units for density are grams per cubic centimetre (g/cm³) when mass is measured in grams (g) and volume in cubic centimetres (cm³).
When measuring the density of a liquid, how do you find the mass of the liquid?
Subtract the mass of the empty measuring cylinder from the mass of the cylinder with the liquid in it.
Mass of liquid = mass of cylinder with liquid − mass of empty cylinder
Why are gases generally less dense than solids?
Gases are generally less dense than solids because the molecules in a gas are more spread out over a larger volume.
Which instrument would you use to measure the dimensions of a very small object most accurately?
A micrometer, which measures objects around 3 cm in length with a resolution of 0.001 mm.
A ruler (up to 30 cm) or Vernier calipers (around 15 cm) are used for larger objects.
True or False?
Density is a scalar quantity.
True.
Density is a scalar quantity.
True or False?
Water should be poured into the measuring cylinder while it is on the digital balance.
False.
Water should not be added while the cylinder is on the balance, as a spill onto the electric balance could cause an electric shock.
Define volume.
Volume is the amount of space occupied by an object in three-dimensional space.
Why should you repeat your measurements and take an average in this experiment?
Repeating measurements and taking an average reduces the effect of random errors, giving a more reliable result.
State the equation used to calculate the volume of an object.
The equation used to calculate the volume of an object is $V = l \times w \times h$
Where:
- $l$ = length of object, measured in metres (m)
- $w$ = width of object, measured in metres (m)
- $h$ = height of object, measured in (m)
Identify which object is more dense, the one on the left or the one on the right.
The object on the right is more dense because the particles are packed more closely together.

Sign up to unlock flashcards

By signing up you agree to our Terms and Privacy Policy

Previous:1.3 Mass & WeightNext:1.5 Forces