Welcome to your B8 Practice Questions 1.9 – Density

1. 
Two cubes both have a volume of 1 cm³. The fir wood cube has a mass of 0.5 g, the copper cube has a mass of 8.96 g. Which statement is correct?

2. 

The symbol for density is the Greek letter .

3. 
Density is a property of a substance, just like the melting point.

4. 

Density is the ratio of the of a portion of a substance to its volume.

5. 
Which formula is used to calculate density?

6. 

The unit of density is g/cm³. It is spoken as "grams per centimetre".

7. 
Substances with a greater density than water float on water.

8. 

Substances such as copper, which have a greater density than water, in water.

9. 
Why do fir wood and ice float on water?

10. 

The volume of an irregularly shaped object can be measured in a measuring filled with water.

11. 
When an object is completely immersed in the water of a measuring cylinder, the water level rises by exactly the volume of the object.

12. 

To find the mass of a liquid, you the mass of the empty measuring cylinder from the mass of the full measuring cylinder.

13. 
A piece of metal has a mass of 27 g and a volume of 10 cm³. What is its density?

14. 

To find the mass of a gas, the gas is filled into a , which is closed and weighed.

15. 
Lead (11.3 g/cm³) sinks in water, while candle wax (0.98 g/cm³) floats on water.

16. 

Ice has a lower density than liquid , so it floats on it.