Physics for IGCSE & O level - The Earth In Space (Section 3)
1
What is the meaning of the term 'interpolation'?
پاسخ دهید(A)
Finding values between plotted points
2
پاسخ دهید(B)
The distance light travels in one year.
3
What phenomenon is associated with the expansion of the universe?
4
What is a key aspect of the student's report?
5
What is essential for safe handling of a thermometer?
6
When writing your report, what elements should be described?
7
What is the effect on the wavelength of light from a receding source?
8
What should be done to the burners and tripods before using?
9
What does the text suggest about the early universe?
10
What is key when measuring the speed of sound?
11
What causes the redshift of light from distant galaxies?
پاسخ دهید(C)
The galaxies are moving away from Earth.
12
How can you protect your eyes when working in a lab?
13
What causes the galaxies to be spreading apart?
پاسخ دهید(C)
Expansion of the space between them
14
Which piece of equipment is essential for measuring voltage in a circuit?
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?
پاسخ دهید(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?
پاسخ دهید(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?
پاسخ دهید(B)
To detect radiation left over from the Big Bang
18
What term is used to describe the stretching of space between galaxies?
19
In a lab, what type of clothing or accessories should be avoided?
20
Section 11.2 most likely covers what?
21
State two conditions needed for an object to be in equilibrium.
22
What does the term "redshift" refer to in astronomy?
پاسخ دهید(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?
پاسخ دهید(A)
Rinse your eyes with water for a long time.
24
How is the speed of sound calculated?
پاسخ دهید(A)
Speed = Frequency x Wavelength
25
Which of the following is the unit for measuring current?
26
An object is viewed through a convex lens which is being used as a magnifying glass. Which statement describes the image?
پاسخ دهید(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?
پاسخ دهید(B)
Using heat-resistant gloves.
28
What type of energy is associated with the motion of particles?
29
What is the average speed of the earth?
30
What is the Doppler effect?
پاسخ دهید(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?
پاسخ دهید(C)
Objects moving away from us.
32
Which title includes the word 'galaxies'?
33
How can you measure the strength of a tissue?
34
In the experiment about the length of wire, what is the dependent variable?
35
In Rutherford's model, where are most of the mass and positive charge concentrated?
36
What does the slope of the graph indicate?
پاسخ دهید(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?
38
What could be the role of the ammeter?
39
What is the relationship between internal energy and the motion of particles?
پاسخ دهید(C)
Internal energy considers both kinetic and potential energies of particles.
40
Why is it important to wear eye protection in a laboratory?
پاسخ دهید(B)
To protect your eyes from hazards.
41
What should you do if you smell gas in the lab?
پاسخ دهید(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?
43
What are the key areas to consider when evaluating your experiments?
44
Which statement explains why it is better to calculate the average time for 3 drops of water to fall rather than 1 drop?
پاسخ دهید(A)
to get a higher accuracy in the data.
45
When measuring the length of the wire what should you do?
پاسخ دهید(A)
Make sure you use the correct unit
46
What is the name of the force responsible for binding nucleons in a nucleus?
47
Which of the following actions are important in planning an experiment?
48
What should you do if you see someone get electrocuted?
49
What does Edwin Hubble's observation of the red shift of distant galaxies suggest about their movement?
پاسخ دهید(B)
They are moving away from the Earth.
50
What is the dependent variable in an experiment to determine the melting point of ice?
