10 minutes maximum! Can you do it in 5?

1. Which of these is the correct formula for density?
 A. density = mass x volume
 B. density = mass ÷ volume^{}
 C. density = volume ÷ mass^{}
 D. density = volume  mass^{}
 
Q2+3:
This metal cube of side 2cm has a mass of 32g. 

2. The density is ...
 A. 2 g/cm^{3}
 B. 4 g/cm^{3}
 C. 8 g/cm^{3}
 D. 16 g/cm^{3}
 
3. If you heated the cube it would expand a little. This would make ....
 A. the mass increase and therefore the density increase.^{}
 B. the mass increase and therefore the density decrease.^{}
 C. the volume increase and therefore the density decrease.^{}
 D. the volume increase and therefore the density increase.
 
Q 46. These questions are about the densities of different substances.
What are the missing values? 

Substance 
Density (g/cm^{3})

Mass (g) 
Volume (cm^{3}) 
Glass 

9 
6 
Lead 
11.3 

200 
Wood 
0.8 
80 


7. Floating or sinking depends on density.
The density of water is 1 g/cm^{3}.
The density of this block is is 1.1 g/cm^{3}.


This means that if you put this block in water it will...
 A. float because it has a density higher than ^{}1 g/cm^{3}.
 B. float because it has a density lower than ^{}1 g/cm^{3}.
 C. sink because it has a density higher than ^{}1 g/cm^{3}.
 D. sink because it has a density lower than ^{}1 g/cm^{3}.
 
Q810.
A green ball has been put into the measuring cylinder shown, and the water level has risen. 


8. The water has been...
 A. dispersed^{}.
 B. displaced.
 C. diffracted.
 D. diffused.
 
9. Using measurements from the diagram above, what is the density of the ball?
 A. 0.47 g/cm^{3}
 B. 3.50 g/cm^{3}
 C. 0.91 g/cm^{3}
 D. 1.10 g/cm^{3}
 
10. If the ball is cut in half and the experiment repeated, the density will
. 
