Sign In

Physics for IGCSE & O level - Measurements And Units (Section 6)

1
What instrument is best suited for accurately measuring the volume of a liquid?
Answer
(C)
Graduated cylinder
2
What is the mass of an object if the beam balance reading is 1.2 kg?
Answer
(B)
1.2 kg
3
What is the relationship between the mass of an object and its weight?
Answer
(C)
Weight is the downward pull of gravity; mass can be compared because of how gravity acts.
4
What does the term 'precision' refer to in measurements?
Answer
(B)
How close several measurements are to each other.
5
What would be the best unit for the volume of a room?
Answer
(D)
Cubic meters
6
What is the approximate density of water?
Answer
(A)
1 g/cm³
7
What is the base unit for mass in the SI system?
Answer
(C)
Kilogram
8
What is the standard unit for electric potential difference (voltage)?
Answer
(B)
Volt
9
Which of the following is an example of a derived unit?
Answer
(D)
m/s
10
What is the SI unit for mass?
Answer
(B)
Kilogram
11
Which of the following statements is/are true about scientific notation?
Answer
A
B
C
D
12
What is a common unit used to measure area?
Answer
(C)
Square meters
13
In scientific notation, the number 0.005 is written as:
Answer
(B)
5 x 10^-3
14
What is a graduated cylinder used for?
Answer
(B)
Measuring the volume of liquids
15
What is the purpose of the prefix 'kilo-'?
Answer
(B)
To multiply by 1000.
16
Which of the following is an example of a derived unit?
Answer
(C)
Newton
17
How many seconds are there in a millisecond?
Answer
(C)
0.001
18
What is meant by the term 'derived units'?
Answer
(C)
Units derived from base units.
19
If an object has a mass of 500g and a volume of 100 cm³, what is its density in g/cm³?
Answer
(C)
5 g/cm³
20
What is a key concept in the check up on measurements and units related to density?
Answer
(D)
The units of density.
21
What does the area of a rectangle depend on?
Answer
(C)
The length and the width
22
What is the volume of a 1 cm cube?
Answer
(C)
1 cm³
23
What is the SI unit for thermodynamic temperature?
Answer
(C)
Kelvin
24
What is a reading of 1.05 on an hydrometer?
Answer
(A)
The density of the liquid is 1050 kg/m³
25
What is the approximate average density of Jupiter?
Answer
(A)
1300 kg/m³
26
If you are using a measuring cylinder to find the volume of a liquid, what is a related topic (related to the revision checklist)?
Answer
(C)
Measuring the density of liquid.
27
How many millimeters are in 1 meter?
Answer
(C)
1000
28
What is a milligram equal to?
Answer
(C)
1/1000 gram
29
Which of the following is a unit for measuring energy?
Answer
(B)
Joule
30
How many meters are in a kilometer?
Answer
(C)
1000
31
What calculation is required to determine an object's density?
Answer
(B)
Mass / Volume
32
Which unit is used to measure the amount of a substance?
Answer
(A)
mole
33
Which of the following is the symbol for density?
Answer
(C)
ρ
34
Which of the following represents the conversion from meters to kilometers?
Answer
(C)
Divide by 1000
35
What does the term 'significant figures' relate to?
Answer
(B)
The accuracy of a measurement
36
What is the SI unit of frequency?
Answer
(A)
Hertz
37
What can be measured using a ruler?
Answer
(B)
Length
38
What are the SI units mentioned?
Answer
(B)
Metre, kilogram, and second
39
What units would be appropriate for expressing the speed of a car?
Answer
A
B
C
40
What term describes the closeness of a measurement to its true value?
Answer
(B)
Accuracy
41
What is weight measured in?
Answer
(A)
Newtons
42
In scientific notation, how many significant figures are in the number 4.00 x 10^2?
Answer
(C)
3
43
What is a physical quantity composed of?
Answer
(C)
A number and a unit
44
Which of the following is a measurement of a derived quantity?
Answer
(C)
Speed
45
What is the process called when you add liquid to a container to measure the volume of a solid object?
Answer
(C)
Displacement
46
What is the unit for density?
Answer
(C)
kg/m³