Density

Four blocks, each made from a different material, are placed on scales and balanced as shown in the diagrams below.

In which diagram does the block have the greatest density?
1. A
2. B
3. C
4. D
The beakers shown contain three different liquids.

Which statement about the densities of the liquids is correct?
1. Liquid 1 has twice the density of liquid 3.
2. Liquid 3 has twice the density of liquid 2.
3. The liquids all have different densities.
4. The liquids all have the same densities.
The measuring cylinder on the left contains 60 cm³ of water. When a metal object is lowered into the water so that it is completely below the surface, the reading goes up to 78 cm³. The mass of the object is 128 g.

What is the density of the body?
1. 7.1 g/cm³
2. 0.6 g/cm³
3. 2.1 g/cm³
4. 1.6 g/cm³
Which measurements are needed to determine the density of a solid?
1. Mass and volume
2. Mass and force
3. Pressure and volume
4. Pressure and force
As part of an experiment to find the density of stone, a stone is lowered into a measuring cylinder partly filled with water.
What information can be obtained from the measuring cylinder readings?
1. The diffference between the readings gives the volume of the stone.
2. The difference between the readings gives the density of stone.
3. The final reading gives the density of the stone.
4. The final reading gives the volume of the stone.
A stone of mass 40 g is lowered into the measuring cylinder. The water level rises as shown.

What is the density of the stone?
1. 0.80 g/cm³
2. 2.0 g/cm³
3. 1.2 g/cm3
4. 0.5 g/cm³
Which of the following describes the density of a material?
1. The mass per unit volume of the material.
2. The pull of gravity on the material.
3. The volume per unit mass of the material.
4. The amount of matter in the material.
The total mass of a measuring cylinder and its contents are determined before and after putting a stone
in it.

Using the apparatus as shown, the readings can be used to calculate the density of ..........................
1. the liquid only.
2. the stone only.
3. neither the liquid, nor the stone.
4. both the liquid and the stone.
A container, of mass 100g, contains 80 cm³ of liquid. The total mass of the container and liquid is 140 g.

What is the density of the liquid?
1. 0.80 g/cm³
2. 0.5 g/cm³
3. 1.75 g/cm³
4. 2.00 g/cm³
A cube of side 3 cm is placed in a graduated measuring cylinder. 125 cm³ of water is then addded and the cube remains at the bottom of the cylinder.

What will be the reading on the measuring cylinder?
1. 131 cm³
2. 128 cm³
3. 152 cm³
4. 134 cm³
A body of mass 500 g was suspended in 100 cm³ of water by a piece of cotton as shown in the diagram.

What is the density of the body?
1. 0.38 g/cm³
2. 2.63 g/cm³
3. 0.18 g/cm³
4. 5.56 g/cm³
The diagram shows a solid with dimensions 5 cm x 4 cm x 2 cm. It has a mass of 100g.

What is the density of the solid?
1. 0.4 g / cm ³
2. 2.5 g / cm ³
3. 5.0 g / cm ³
4. 10 g / cm ³
Some students measure the masses and the volumes of different sized samples of a type of wood.

Which graph shows their results
What apparatus is needed to determine the density of a regularly shaped block?
1. a balance and a ruler
2. a balance and a beaker
3. a measuring cylinder and a ruler
4. a measuring cylinder and a beaker
Below is a graph that shows the variation of volume, of a mixed mass of liquid, with temperature.

From the graph it can be seen that the density of the liquid reaches ............................
1. a minimum value at 120^oC
2. a minimum value at 100^oC
3. at maximum value at 100^oC
4. at maximum value at 120^oC

Density

Multiple Choice Questions