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Physics for IGCSE & O level - Measurements And Units (Section 1)

1
Which is a unit of volume?
Answer
(C)
liter
2
What is weight measured in?
Answer
(C)
Newtons
3
What is a graduated cylinder used for?
Answer
(B)
Measuring volume of liquids
4
Which of the following is a correct unit of density?
Answer
(A)
g/cm³
5
If a crown has a density less than the density of gold, what can be inferred?
Answer
(C)
The crown is a mixture.
6
Which of the following is NOT a base SI unit?
Answer
(C)
Liter
7
What type of error is reduced if the measurement is taken at eye level?
Answer
(D)
Human error due to parallax
8
Which of the following substances will float in water?
Answer
(C)
Kerosene
9
What is the main function of a hydrometer?
Answer
(C)
To measure the density of a liquid
10
In which units is the volume of a rectangular block calculated if length, width and height are given in cm?
Answer
(C)
cm³
11
If you squeeze air in a plastic bag, how does its density change?
Answer
(C)
It increases.
12
What is the mass of an object, measured in force units, called?
Answer
(A)
Weight
13
Which of the following is NOT a unit of time?
Answer
(D)
gram
14
Which is equivalent to 1000 meters?
Answer
(C)
1 km
15
What is the name of the force that pulls objects downwards?
Answer
(B)
Gravity
16
Which prefix means 'one thousand'?
Answer
(A)
kilo
17
Which material will float in water?
Answer
(D)
Kerosene
18
Which of the following best explains why a hot air balloon rises?
Answer
(B)
Hot air is less dense than cold air.
19
In the context of Archimedes and the crown, what was the King suspicious of?
Answer
(A)
The goldsmith.
20
Which of these represents the relationship between mass, density, and volume?
Answer
(C)
Density = Mass / Volume
21
What is the meaning of 'density'?
Answer
(A)
Mass/Volume
22
If a plastic bag filled with air has a volume of 0.008 m³ and then is squeezed, what will happen to its density?
Answer
(B)
It will increase.
23
Which of the following will happen if a material has a density less than that of a liquid?
Answer
(C)
It will float
24
What is the name of the force, measured in Newtons, that pulls an object down?
Answer
(C)
Weight
25
Which of the following measurements is a measure of weight?
Answer
(B)
Newtons
26
Which of the following statements about the density of Earth and Jupiter is correct?
Answer
A
B
C
27
What is a common unit for time?
Answer
(C)
second
28
Which of the following is the formula for density?
Answer
(B)
Density = mass/volume
29
What information is needed to calculate the density of the air in a plastic bag?
Answer
A
B
30
Which of the following is used to measure the density of a liquid?
Answer
(B)
Hydrometer
31
If you have a rectangular block with length 5 cm, width 2 cm, and height 3 cm, calculate its volume.
Answer
(C)
30 cm³
32
What is likely the material of a high-density core of a planet?
Answer
(C)
Iron
33
What happens to the water level when a solid object is placed in a measuring cylinder?
Answer
(C)
It increases.
34
Which of the following are SI units?
Answer
A
B
D
35
What is the primary function of a beam balance?
Answer
(B)
Comparing weights.
36
Which of the following statements is correct regarding Archimedes' discovery?
Answer
(C)
He discovered the density of the crown.
37
What can we conclude if the density of an object is less than the density of the liquid it is placed in?
Answer
(B)
The object will float.
38
Which of the following is a derived unit?
Answer
(D)
liter
39
What instrument is used to measure the volume of a liquid?
Answer
(B)
Measuring cylinder
40
Which statement is true?
Answer
(D)
A hot-air balloon will rise upwards because hot air is less dense than cold air.
41
Which of the following are SI units?
Answer
A
B
C
42
What is the name of the Greek mathematician known for his work on density?
Answer
(A)
Archimedes
43
What instrument is used to measure the density of a liquid?
Answer
(D)
A hydrometer
44
What is the unit of measurement for the period of a pendulum?
Answer
(C)
Seconds
45
What can be used to measure the density of a liquid?
Answer
(C)
A hydrometer
46
How is the volume of an irregular solid determined?
Answer
(B)
By displacement
47
Which of the following can be used to measure length?
Answer
A
B
48
What does the prefix 'centi' mean?
Answer
(C)
1/100
49
Which two quantities are needed to calculate density?
Answer
(A)
Mass and Volume
50
When measuring length, what should be aligned?
Answer
(A)
The end of the ruler with the end of the object