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Worksheetsphysics Density - Grade 9
Total questions: 10
Worksheet time: 5mins
In the photo shown, there is a person floating in the water of the Dead Sea. Why does this person not sink?
He is not a very heavy person
The density of the saltwater is greater than the man's density.
His body is more dense than the density of the saltwater
This person must be lying on a submerged airbed
Which of the following metals will sink in a basin of mercury whose density is 13.6 g/cm³?
Iron of density 7.9 g/cm³
Uranium of density 19.5 g/cm³
Aluminium of density 2.7 g/cm³
Lead of density 11.3 g/cm³
If V = volume, D = density and M = mass of an object, then which one of the following relationships is correct?
M = D × V
D = M × V
V = M × D
M = D ÷ V
Which one of the following would you NOT use to get the density of a liquid?
Balance
Measuring cylinder
Beaker
Vernier callipers
The density of aluminium is 2.7 grams per centimetre cubed.
What mass will a volume of 200 cm3 of aluminium have?
54 grams
540 grams
5.4 grams
0.054 grams
Which one of the following statements is INCORRECT?
A solid object floats in a liquid if it is less dense than the liquid.
A steel ship will sink in seawater because its density is greater than the density of the seawater.
Different types of wood (e.g. mahogany, pine, cork etc.), all of the same shape will all float at different depths in water.
The density of a submarine will determine if it floats submerged, or if it sinks in the water.
If copper floats on mercury, and gold sinks in mercury, then which one of the following statements is TRUE?
Mercury is the least dense of the three metals
Mercury is denser than gold
Copper is less dense than gold.
Copper is more dense than mercury
Study the chart showing the densities of different metals.
5,25 gram
5,1 gram
6,5 gram
0,5 gram
Which of the following substances is the least dense?
Carbon dioxide
Steam
Helium
Water
Why did the balloon come back down to the ground?
The air around it pushed it down.
The air inside cooled and became more dense forcing the balloon to descend.
The air inside the balloon heated up and the air was too hot to rise.
The balloon may have had a hole in it.
