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Physics for IGCSE & O level - The Earth In Space (Section 3)

1
What is the meaning of the term 'interpolation'?
Answer
(A)
Finding values between plotted points
2
What is a "light year"?
Answer
(B)
The distance light travels in one year.
3
What phenomenon is associated with the expansion of the universe?
Answer
(B)
Red shift
4
What is a key aspect of the student's report?
Answer
(D)
All of the above
5
What is essential for safe handling of a thermometer?
Answer
A
B
6
When writing your report, what elements should be described?
Answer
(D)
All of the above
7
What is the effect on the wavelength of light from a receding source?
Answer
(B)
Wavelength increases
8
What should be done to the burners and tripods before using?
Answer
(D)
All of the above.
9
What does the text suggest about the early universe?
Answer
(B)
It was expanding
10
What is key when measuring the speed of sound?
Answer
A
B
D
11
What causes the redshift of light from distant galaxies?
Answer
(C)
The galaxies are moving away from Earth.
12
How can you protect your eyes when working in a lab?
Answer
(A)
Wear safety goggles
13
What causes the galaxies to be spreading apart?
Answer
(C)
Expansion of the space between them
14
Which piece of equipment is essential for measuring voltage in a circuit?
Answer
(B)
Voltmeter
15
Two wires, X and Y, are made of the same material and are at the same temperature. Which statement explains that resistance is correct?
Answer
(B)
X has double the resistance of Y.
16
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.
17
What is the primary reason for the use of radio telescopes in the study of the universe?
Answer
(B)
To detect radiation left over from the Big Bang
18
What term is used to describe the stretching of space between galaxies?
Answer
(B)
Expansion
19
In a lab, what type of clothing or accessories should be avoided?
Answer
(D)
All of the above
20
Section 11.2 most likely covers what?
Answer
(C)
The Solar System
21
State two conditions needed for an object to be in equilibrium.
Answer
A
C
22
What does the term "redshift" refer to in astronomy?
Answer
(A)
The shift of a star towards the red end of the spectrum
23
If a chemical splashes into your eyes, what should you do?
Answer
(A)
Rinse your eyes with water for a long time.
24
How is the speed of sound calculated?
Answer
(A)
Speed = Frequency x Wavelength
25
Which of the following is the unit for measuring current?
Answer
(B)
Ampere (A)
26
An object is viewed through a convex lens which is being used as a magnifying glass. Which statement describes the image?
Answer
(D)
The image is virtual and between the lens and the eye
27
What safety precaution must be followed when working with a hot surface?
Answer
(B)
Using heat-resistant gloves.
28
What type of energy is associated with the motion of particles?
Answer
(B)
Kinetic Energy
29
What is the average speed of the earth?
Answer
(B)
1.3 x 10^4 m/s
30
What is the Doppler effect?
Answer
(A)
The change in frequency of a wave for an observer moving relative to its source.
31
What is the cause of the 'red shift' in astronomy?
Answer
(C)
Objects moving away from us.
32
Which title includes the word 'galaxies'?
Answer
(D)
11.5
33
How can you measure the strength of a tissue?
Answer
(B)
By using a spring
34
In the experiment about the length of wire, what is the dependent variable?
Answer
(D)
The resistance
35
In Rutherford's model, where are most of the mass and positive charge concentrated?
Answer
(B)
In the nucleus
36
What does the slope of the graph indicate?
Answer
(A)
The relationship between variables
37
What type of energy is described as the total amount of energy that is transferred as a result of the temperature difference?
Answer
(C)
Thermal energy
38
What could be the role of the ammeter?
Answer
(B)
To measure current
39
What is the relationship between internal energy and the motion of particles?
Answer
(C)
Internal energy considers both kinetic and potential energies of particles.
40
Why is it important to wear eye protection in a laboratory?
Answer
(B)
To protect your eyes from hazards.
41
What should you do if you smell gas in the lab?
Answer
(B)
Turn off the gas supply, if safe to do so, and inform the instructor.
42
What happens to the wavelengths of light from galaxies moving away from the Earth?
Answer
(B)
They are stretched.
43
What are the key areas to consider when evaluating your experiments?
Answer
A
B
44
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.
45
When measuring the length of the wire what should you do?
Answer
(A)
Make sure you use the correct unit
46
What is the name of the force responsible for binding nucleons in a nucleus?
Answer
(C)
Strong nuclear force
47
Which of the following actions are important in planning an experiment?
Answer
(D)
All of the above
48
What should you do if you see someone get electrocuted?
Answer
A
B
C
49
What does Edwin Hubble's observation of the red shift of distant galaxies suggest about their movement?
Answer
(B)
They are moving away from the Earth.
50
What is the dependent variable in an experiment to determine the melting point of ice?
Answer
(A)
The temperature