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Course: Alhussan Physics — Stage 9
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Alhussan Physics — Stage 9

Chapter 11: Forces and Density

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Chapter 12: Energy Transfer

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Chapter 13: Sound Waves

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Chapter 14: Electrical Circuits, Resistance and Power

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Chapter 15: The Earth in Space (Universe and Stars)

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Quiz

Physics 11.1 Floating and sinking — Quiz

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  • Questions count: 50
  • Passing grade: B+
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1.
Will an object of 300 g and 120 cm³ float in water? Give its density.
36000.00 g/cm³
2.50 g/cm³
1.00 g/cm³
0.40 g/cm³
2.
Which statement is correct?
1 g/cm³ = 10 kg/m³.
The densest liquid sits on top.
Oil sinks in water.
An object floats if its density is less than the liquid.
3.
Which statement is NOT correct?
Rocks on the sea bed are denser than water.
1 g/cm³ = 10 kg/m³.
A lump of clay sinks but a clay boat can float.
Liquids form layers with the densest at the bottom.
4.
Which term matches this definition? “Unit of density.”
Digital thermometer
kg/m³
Efficiency
Submarine
5.
Which is the correct definition of “Float”?
Temperature scale where water freezes at 0 and boils at 100.
Energy transferred by infrared waves.
Stay at the surface; less dense than the liquid.
Total energy supplied.
6.
Which term matches this definition? “Floating buoy less dense than water.”
Channel marker
Draught
Input energy
Internal energy
7.
Which term matches this definition? “Mass per unit volume.”
Density
Input energy
Sea breeze
Sinking cool fluid
8.
Mass and volume of blocks. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 1
A
B
C
D
9.
An object sinks if its density is ____ than the liquid.
equal
less
zero
greater
10.
Density of liquids (g/cm³). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 2
A
B
C
D
11.
Mass 92 g, volume 10 cm³. Density?
82.00 g/cm³
9.20 g/cm³
920.00 g/cm³
0.11 g/cm³
12.
True or false? An egg sinks in fresh water but floats in salty water.
True
False
13.
True or false? Floating means upthrust is less than weight.
True
False
14.
Which term matches this definition? “Liquids of different densities stacking.”
Input energy
Sweating
Liquid layers
Draught
15.
Which is the correct definition of “Liquid layers”?
Higher temperature.
Wind from sea to land by day.
Liquids of different densities stacking.
Energy of moving particles.
16.
Mass 24 g, volume 100 cm³. Density?
−76.00 g/cm³
2400.00 g/cm³
0.24 g/cm³
4.17 g/cm³
17.
Density of materials (g/cm³). About how many times bigger is Steel than Cork?
Dr Dabour Hub Academy - figure 3
16.5
65.8
32.9
49.4
18.
Mass and volume of blocks. Which statement best describes the pattern?
Dr Dabour Hub Academy - figure 4
"Mass (g)" decreases as "Volume (cm³)" increases
"Mass (g)" increases as "Volume (cm³)" increases
"Mass (g)" rises to a peak at 50, then falls
"Mass (g)" stays the same
19.
Density of materials (g/cm³). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 5
A
B
C
D
20.
Salt needed to float an egg. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 6
A
B
C
D
21.
An object floats if its density is ____ than the liquid.
less
more
double
equal
22.
Density of liquids (g/cm³). About how many times bigger is Mercury than Oil?
Dr Dabour Hub Academy - figure 7
29.6
7.4
14.8
22.2
23.
Which statement is NOT correct?
Channel markers are less dense than water.
Liquids form layers with the densest at the bottom.
An object floats if its density is less than the liquid.
The densest liquid sits on top.
24.
Mass is measured with a ____.
balance
ruler
measuring cylinder
thermometer
25.
Mass and volume of blocks. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 8
A
B
C
D
26.
Mass 7 g, volume 10 cm³. Density?
0.70 g/cm³
−3.00 g/cm³
1.43 g/cm³
70.00 g/cm³
27.
Convert 7.9 g/cm³ to kg/m³.
7900 kg/m³
790 kg/m³
79,000 kg/m³
8 kg/m³
28.
It is easier to float in salt water because it is ____ than fresh water.
clearer
warmer
denser
less dense
29.
Density of liquids (g/cm³). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 9
A
B
C
D
30.
A rock has mass 15 g and volume 50 cm³. What is its density?
−35.0 g/cm³
750.0 g/cm³
3.3 g/cm³
0.3 g/cm³
31.
True or false? 1 g/cm³ = 10 kg/m³.
True
False
32.
Which is the correct definition of “kg/m³”?
Load carried by a ship.
Good conductor of heat.
Unit of density.
Tank a submarine fills with water to sink.
33.
Which statement is correct?
Floating means upthrust is less than weight.
Objects denser than water float.
1 g/cm³ = 10 kg/m³.
Water has density 1.0 g/cm³.
34.
Which is the correct definition of “Sink”?
Larger area speeds evaporation.
Energy given out.
Energy carried by moving fluid.
Go down; denser than the liquid.
35.
Density of liquids (g/cm³). What is the value for Water?
Dr Dabour Hub Academy - figure 10
1.00
1.03
0.92
1.42
36.
A floating object has upthrust equal to its ____.
density
weight
volume
mass
37.
Which statement is NOT correct?
Density = mass ÷ volume.
Objects float lower in salt water.
Salt water is denser than fresh water.
A floating object has upthrust equal to its weight.
38.
A lump of clay sinks but a clay boat can ____.
float
melt
explode
dissolve
39.
Density of materials (g/cm³). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 11
A
B
C
D
40.
Density of materials (g/cm³). Which has the greatest value?
Dr Dabour Hub Academy - figure 12
Wood
Cork
Steel
Ice
41.
Salt needed to float an egg. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 13
A
B
C
D
42.
Will an object of 50 g and 100 cm³ float in water? Give its density.
1.00 g/cm³
0.50 g/cm³
5000.00 g/cm³
2.00 g/cm³
43.
Mass 790 g, volume 10 cm³. Density?
7900.00 g/cm³
79.00 g/cm³
0.01 g/cm³
780.00 g/cm³
44.
Density of materials (g/cm³). Which has the smallest value?
Dr Dabour Hub Academy - figure 14
Cork
Water
Wood
Ice
45.
Mass 270 g, volume 10 cm³. Density?
2700.00 g/cm³
27.00 g/cm³
0.04 g/cm³
260.00 g/cm³
46.
Which statement is NOT correct?
Floating means upthrust is less than weight.
Channel markers are less dense than water.
Liquids form layers with the densest at the bottom.
Density = mass ÷ volume.
47.
Which is the correct definition of “Density”?
How well a material conducts heat.
Used to find volume by displacement.
Temperature scale where water freezes at 0 and boils at 100.
Mass per unit volume.
48.
True or false? The densest liquid sits on top.
True
False
49.
Density of materials (g/cm³). What is the value for Wood?
Dr Dabour Hub Academy - figure 15
0.70
0.24
0.92
1.00
50.
True or false? Wood floats because its density is about 0.7 g/cm³.
True
False
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Part of Chapter 11: Forces and Density — see every lesson and quiz in this unit.
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