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Physics for IGCSE & O level - Measurements And Units (Section 2)

1
If a ruler is used, which is crucial to ensure an accurate reading?
Answer
(C)
Placing the ruler next to the object
2
What instrument is used to measure mass?
Answer
(B)
Balance
3
When using a beam balance, what are you essentially comparing?
Answer
(B)
Weights
4
Which of these would be the most appropriate unit for measuring the distance between two cities?
Answer
(D)
km
5
What does the average density of a planet provide information about?
Answer
(C)
The planet's internal structure.
6
What happens to the mass of air in the bag if you squeeze the bag?
Answer
(C)
The mass stays the same.
7
Which of the following are examples of units of volume?
Answer
A
B
D
8
How many millimeters are in a meter?
Answer
(C)
1000
9
What is the effect of adding a stone to a measuring cylinder containing water?
Answer
A
C
10
What is a practical application of understanding density?
Answer
(A)
Predicting whether something will sink or float.
11
Which of these represents the correct formula to calculate volume?
Answer
(A)
length x width x height
12
Which statement about the density of Earth is correct?
Answer
(A)
Average density is 9520 kg/m³
13
What can be calculated if you know the mass and volume of an object?
Answer
(B)
Its density.
14
Which factors are involved in calculating the volume of a rectangular object?
Answer
A
B
D
15
Which units can be used for measuring density?
Answer
A
B
16
What does the density of a liquid depend on?
Answer
(B)
The type of the liquid.
17
Which of the following statements are correct concerning density?
Answer
A
B
C
18
Which term describes the amount of space an object takes up?
Answer
(C)
Volume
19
Which of the following statements regarding a simple beam balance are true?
Answer
A
B
C
20
Which of the following are base units?
Answer
A
B
C
21
What are the units for speed?
Answer
A
B
22
What is the purpose of the hot air rising in a hot air balloon?
Answer
(B)
To decrease the density.
23
What is the relationship between the mass of a planet and the orbit of any moon around it?
Answer
(B)
The mass of a planet affects the gravitational pull and the orbit of its moons.
24
What is the approximate density of water?
Answer
(B)
1000 kg/m³
25
What is the formula for calculating the volume of a rectangular block?
Answer
(B)
Length x Width x Height
26
What unit is typically used for measuring the length of a room?
Answer
(C)
m
27
How is a beam balance used?
Answer
(C)
To compare masses.
28
What is the main purpose of comparing masses?
Answer
(B)
To determine if the object will sink or float
29
What will happen to an object if its density is less than the density of the liquid it is placed in?
Answer
(B)
It will float.
30
What is a common unit for measuring density?
Answer
(A)
kg/m³
31
What does the text say about the relationship between the mass of the planet and its average density?
Answer
(B)
Density of the planet increases as the mass increases.
32
If the density of a solid object is 2.0 g/cm³, and you place it in a liquid with a density of 1.5 g/cm³, what will happen?
Answer
(B)
The object will sink.
33
What is the term for the time it takes a pendulum to complete one full swing?
Answer
(C)
Period
34
What is the relationship between a material's density and its ability to float or sink?
Answer
(D)
If the density is lower than the liquid, it floats.
35
What is the base unit of time?
Answer
(A)
second
36
What factors are necessary for calculating the volume of a rectangular block?
Answer
A
B
D
37
Which of the following statements are correct about density?
Answer
A
C
D
38
Which is the formula used to calculate the density of air in a bag?
Answer
(A)
Density = Mass / Volume
39
If an object floats, what can you say about its density compared to water?
Answer
(B)
It is less
40
Which instrument is most often used for timing short intervals?
Answer
(C)
Stopwatch
41
What unit is typically used for measuring the mass of a person?
Answer
(C)
kg
42
What is the name of the device used to compare masses?
Answer
(B)
Beam balance
43
The process of determining the amount of space a solid occupies is called:
Answer
(D)
measuring volume
44
What should a student consider when making a claim about the period of the pendulum?
Answer
A
B
45
What is the formula for density?
Answer
(A)
Density = mass / volume
46
What is an example of a derived unit?
Answer
(D)
m/s
47
What information is needed to calculate the density of a rectangular block?
Answer
A
B
C
48
Which of the following are correct regarding the core of the Earth?
Answer
(B)
The Earth must have a high-density core.
49
If an object sinks in a liquid, what does it mean about the object's density compared to the liquid's density?
Answer
(C)
It is greater than the liquid's density.
50
What type of liquid is a hydrometer designed to measure?
Answer
(B)
The density of a liquid