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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: 21
  • Passing grade: B+
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1.
When does an object float on water?
When its density is greater
When it is light
When its density is less than water's
When it is small
2.
Why do people float easily in the Dead Sea?
There is no gravity
People are lighter there
The very salty water is very dense
The water is hot
3.
A channel marker floats because:
It is tied down
It is made of rock
It is heavier than water
It is less dense than water
4.
True or false? Some volcanic rock (pumice) floats on water.
True
False
5.
True or false? All wood floats.
True
False
6.
True or false? Hollow objects have a lower average density.
True
False
7.
It is easier to float in salt water because it is ____ than fresh water.
clearer
warmer
denser
less dense
8.
An object floats if its density is ____ than the liquid.
less
more
double
equal
9.
An object sinks if its density is ____ than the liquid.
equal
less
zero
greater
10.
Which term matches this definition? “Mass divided by volume.”
Density
Pressure
Upthrust
Weight
11.
Which term matches this definition? “Mass per unit volume.”
Density
Input energy
Sea breeze
Sinking cool fluid
12.
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.
13.
Density of materials (g/cm³). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 1
A
B
C
D
14.
Mass and volume of blocks. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 2
A
B
C
D
15.
Density of liquids (g/cm³). Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 3
A
B
C
D
16.
The table shows densities. Which object floats on water (1.0 g/cm³)?
Dr Dabour Hub Academy - figure 4
Glass marble
Cork
Ebony wood
Steel bolt
17.
Density of materials (g/cm³). Which has the greatest value?
Dr Dabour Hub Academy - figure 5
Wood
Cork
Steel
Ice
18.
Density of materials (g/cm³). Which has the smallest value?
Dr Dabour Hub Academy - figure 6
Cork
Water
Wood
Ice
19.
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
20.
A block of 120 g displaces 150 cm³ of water. Will it float? Calculate its density.
0.8 g/cm³
18000.0 g/cm³
−30.0 g/cm³
1.2 g/cm³
21.
Mass 7 g, volume 100 cm³. Density?
700.00 g/cm³
0.07 g/cm³
14.29 g/cm³
−93.00 g/cm³
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Part of Chapter 11: Forces and Density — see every lesson and quiz in this unit.
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