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Physics for IGCSE & O level - The Earth In Space (Section 8)

1
What did Thomas Young investigate?
Answer
(B)
The interference and diffraction of light
2
Which of the following is a type of radioactive source?
Answer
(D)
All of the above
3
What is a key step in safely preparing to conduct an experiment?
Answer
(D)
Following the experiment instructions carefully.
4
What are safe working conditions for glass tubing?
Answer
A
B
5
What tool is used for measuring length or the half millimetre?
Answer
(B)
Vernier calipers
6
Which of the following are concepts that are related to the expanding Universe?
Answer
A
B
C
7
What is the most important step when you present your data?
Answer
(D)
All of the above
8
What do you need to know about the different proportions?
Answer
(D)
Inverse and direct
9
Which statement explains why it is better to calculate the average time for 3 drops of water to fall rather than 1 drop?
Answer
(A)
to get a higher accuracy in the data.
10
What helps in the interpolation?
Answer
(A)
Finding values from a graph line.
11
In an experiment, what does the independent variable do?
Answer
(C)
Is changed by the experimenter.
12
What should be included in a scientific report?
Answer
(D)
All of the above
13
What is an example of a medium strength force?
Answer
(D)
Electromagnetic force
14
What is the safe and best way to get rid of a solid material?
Answer
(C)
Put them in the correct waste container.
15
In a graph, the _______ variable is usually the one you vary.
Answer
(A)
independent
16
Which instrument is used for drawing?
Answer
(C)
Compass
17
If air is trapped in a sealed cylinder at a pressure of 200kPa, what is the new pressure of the air?
Answer
(C)
600 kPa
18
What does the term "heat" represent?
Answer
(B)
The amount of energy transferred due to a temperature difference.
19
What tool/technology is used in studying the CMBR?
Answer
(C)
Radio telescopes
20
What is the unit for measuring resistance?
Answer
(C)
Ohm (Ω)
21
What is the most important thing about using Bunsen burners and tripods in the lab?
Answer
B
D
22
Which of the following topics are related to the expansion of the universe?
Answer
A
B
C
23
Which statement about the resistances of X and Y is correct?
Answer
(B)
X has double the resistance of Y.
24
What is the name of the theory that explains the origin of the universe?
Answer
(B)
The Big Bang theory
25
What is the size of the force that the man exerts on the cupboard?
Answer
(B)
50 N
26
Who improved the amount of heat obtained and established a quantitative relationship between work and heat?
Answer
(A)
James Joule
27
What is the speed of the lorry?
Answer
(C)
8.1 m/s
28
If you are using an open flame, how is safety addressed?
Answer
A
D
29
If you need to measure the volume of liquid in a lab, what instrument would you use?
Answer
(C)
Graduated cylinder
30
Which of the following phenomena has been linked to the Big Bang?
Answer
A
B
31
What does 'directly proportional' mean on a graph?
Answer
(B)
Both variables increase together
32
Which run has the student filled in incorrectly?
Answer
(C)
C
33
What term describes the phenomenon where the frequency of light changes due to relative motion?
Answer
(B)
The Doppler effect
34
In an experiment, what is the role of the control variables?
Answer
(C)
To be kept the same
35
In a lab, what item is commonly used to handle hot beakers?
Answer
(B)
Tongs
36
What is the size of the force that the man exerts on the cupboard?
Answer
(B)
50 N
37
Why is double glazing used in homes?
Answer
(A)
To improve insulation
38
What should be used to put out a fire in electrical equipment?
Answer
(B)
A carbon dioxide extinguisher
39
Which is the unit for measuring the speed of sound?
Answer
(C)
m/s
40
If a car of mass 1000 kg accelerates at 1 m/s² along a straight, flat road. What is the resultant force acting on the car?
Answer
(C)
1000 N
41
Which one of these is used to measure length?
Answer
(A)
Ruler
42
In a graph, what do you use to help draw conclusions?
Answer
(A)
A straight line
43
What is a critical rule when heating any substance in a test tube?
Answer
(B)
Never point the test tube away from other people
44
If a half of concrete is written on a fraction form, what will it be?
Answer
(C)
1/2
45
Which instrument measures voltage in a circuit?
Answer
(B)
Voltmeter
46
What is the most distant observed galaxies from Earth?
Answer
(C)
More than 13 billion light years away.
47
What is the primary reason for using a wire gauze with a tripod when heating a beaker with a Bunsen burner?
Answer
(C)
To prevent the beaker from breaking.
48
What does the line underneath the graph shows?
Answer
(A)
X-axis
49
In what form is 1000 usually expressed?
Answer
(C)
10^3
50
How can the accuracy of an experiment be improved?
Answer
(B)
Take several readings and find the average.