6.1 Density

Question 1

What is density?

Answer 1

How much mass there is in a given volume of a material.

Question 2

What is the unit of density?

Answer 2

Kilograms per cubic metre (kg/m³).

Question 3

What makes a material more dense?

Answer 3

Having more mass packed into the same space.

Question 4

What is the density of pure water?

Answer 4

1000 kg/m³.

Question 5

How can you tell if an object will float in water?

Answer 5

It floats if its density is lower than water’s density.

Question 6

How do you find the volume of a regular solid (like a cube or cuboid)?

Answer 6

Measure its length, width, and height and multiply them.

Question 7

How do you measure the volume of an irregular solid?

Answer 7

Submerge it in water and measure how much the water level rises.

Question 8

Why is choosing the right measuring instrument important?

Answer 8

Different tools have different resolutions, affecting accuracy.

Question 9

What must you know to calculate density?

Answer 9

The mass of the object and its volume.