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Physics for IGCSE & O level - The Earth In Space (Section 10)

1
What does the text mention as an example of the application of the Doppler effect?
Answer
(B)
The measurement of the speed of a galaxy.
2
Which should be included in your readings?
Answer
A
C
3
When you have a trend line, what should you also check?
Answer
A
D
4
In what scenario is a carbon dioxide fire extinguisher most effective?
Answer
(A)
Electrical fires
5
What does the gradient of a straight-line graph represent?
Answer
(A)
The rate of change between two variables.
6
A lorry with a mass of 3000 kg has 100 kJ of energy in its kinetic energy store. Calculate the speed of the lorry.
Answer
(C)
8.1 m/s
7
What is the effect on the observed frequency of light from a source moving away from the observer?
Answer
(B)
The frequency decreases (redshift).
8
What is the role of a voltmeter in a circuit?
Answer
(A)
To measure voltage
9
What is the speed of the lorry?
Answer
(C)
8.1 m/s
10
In a scientific experiment, what is a 'variable'?
Answer
(B)
Something that changes
11
What are some of the key concepts linked to the Big Bang theory?
Answer
A
B
C
12
What is the unit of Current?
Answer
(B)
Amperes
13
Which is a common method to express fractions?
Answer
(D)
All of the above
14
What is the speed of the lorry?
Answer
(C)
8.1 m/s
15
What is the spring constant of the spring?
Answer
(B)
3.1 N/m
16
The observation of redshift in the light from distant galaxies provides evidence for what?
Answer
(B)
The expanding universe
17
In the context of astronomy, what does "expanding" refer to?
Answer
(C)
The increasing distance between galaxies
18
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.
19
What is the current in the secondary coil? Assume that the transformer is 100% efficient.
Answer
(B)
1.0 A
20
What would you observe when studying the speed of sound?
Answer
A
B
D
21
When drawing a straight line graph, what are the variables on the X and Y axis?
Answer
(A)
The independent variable on the X-axis and the dependent variable on the Y-axis
22
Which of the following is NOT a topic in this document?
Answer
(C)
Black Holes
23
What is the average orbital speed of the Earth?
Answer
(B)
1.3 x 10^4 m/s
24
What term is used to describe the stretching of light waves from receding galaxies?
Answer
(B)
Redshift
25
Who is associated with the observation of heat generated by friction?
Answer
(B)
Count Rumford
26
What should you do to find the average of multiple measurements?
Answer
(A)
Add all measurements and divide by the number of measurements.
27
What is the speed of the lorry?
Answer
(C)
8.1 m/s
28
Which of the following is NOT a stage in the life cycle of a star?
Answer
(C)
Black hole
29
Which of the following is formed in a supernova?
Answer
(C)
A black hole
30
How does a protostar become a star?
Answer
(B)
By starting nuclear fusion
31
What is the process called where the distance doubles, causing the gravitational force to be one-quarter?
Answer
(C)
Inverse square law
32
What is a comet?
Answer
(B)
A ball of ice and dust that orbits the Sun
33
What is a feature of Jupiter's atmosphere?
Answer
(B)
The Great Red Spot
34
Which of these objects can be found in orbit around a planet?
Answer
(B)
Moons
35
What process heats up the material in a protostar?
Answer
(B)
Gravitational potential energy converted to thermal energy
36
What type of light does red shift relate to?
Answer
(A)
Visible light
37
What is the ultimate fate of the Sun?
Answer
(C)
Red Giant then White Dwarf
38
What are the components of the sun's core?
Answer
A
B
39
What is the eventual fate of a star like our Sun?
Answer
(C)
White dwarf
40
Which of the following is a feature of Jupiter?
Answer
(A)
The Great Red Spot
41
What is a satellite?
Answer
(C)
Both a and b
42
What type of star is formed after a supernova?
Answer
(C)
Neutron star
43
What are some objects in space?
Answer
A
B
C
D
44
Which of these is not a factor in the seasons?
Answer
(C)
The phases of the Moon
45
In the context of stars, what are supernovae?
Answer
(B)
Extremely bright explosions
46
What is an accretion disc?
Answer
(C)
A flat rotating disc of gas and dust surrounding a young star.
47
What is a main component of the outer planets?
Answer
A
B
48
What is Earth's primary source of energy?
Answer
(B)
The Sun
49
Which of these is NOT a possible end-stage for a star?
Answer
(C)
Main sequence star
50
What is the source of the Sun's energy?
Answer
(B)
Nuclear fusion