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Physics for IGCSE & O level - The Earth In Space (Section 5)

1
What should be done before working with a heating apparatus?
Answer
(D)
All of the above.
2
What should you do if you spill a chemical in the lab?
Answer
(C)
Tell a teacher
3
What are the units for measuring length?
Answer
(D)
All of the above
4
What is the total resistance of the three resistors?
Answer
(C)
C = 0
5
Who made the initial discovery to suggest that the Earth has a magnetic pole?
Answer
(A)
William Gilbert
6
What should be done when handling radioactive sources?
Answer
(B)
Store them in a locked place.
7
What is the current in the secondary coil? Assume that the transformer is 100% efficient.
Answer
(B)
1.0 A
8
What does the observation of redshift in galaxies tell us?
Answer
(C)
The galaxies are moving away.
9
What is a key skill mentioned for the IGSE exam?
Answer
(A)
Maths
10
What is the size of the force that the man exerts on the cupboard?
Answer
(B)
50 N
11
Which motor has the highest efficiency?
Answer
(B)
Motor B
12
How can you improve the reliability of a measurement?
Answer
(B)
Take several readings and calculate the average.
13
In the lab, what is the most important thing to remember?
Answer
(B)
Always put safety first.
14
In the 1920s, Edwin Hubble showed that light from distant galaxies are red shifted. What did this observation suggest?
Answer
(D)
The galaxies are receding from us.
15
Where should you get the information on how to perform the experiment?
Answer
(B)
From the instructions.
16
Which of these are variables to think about when planning a physics experiment?
Answer
A
B
C
D
17
What does redshift in the light emitted by a galaxy indicate about the galaxy's movement?
Answer
(B)
It is receding from the observer.
18
What are the main types of proportions discussed?
Answer
(A)
Direct and inverse
19
What is the most important to measure when measuring a liquid?
Answer
(A)
The volume
20
What is the tool to measure the mass?
Answer
(A)
Mass balance
21
If you are investigating the extension of a spring, what would the weight added be?
Answer
(B)
The independent variable
22
In a practical test, what equipment is used to measure mass?
Answer
(A)
A spring balance
23
Which components are used in an electric circuit?
Answer
(B)
resistor
24
Which is a topic that would be found in the solar system?
Answer
(C)
Earth
25
Which of the following will the box become once the salt in it is lit?
Answer
(A)
black hole
26
Which term describes something that remains the same throughout an experiment?
Answer
(D)
Constant
27
A car with a mass of 1000kg accelerates at 1 m/s² along a straight, flat road. What is the resultant force acting on the car?
Answer
(C)
1000 N
28
In standard notation, what is 10 to the power of 3?
Answer
(B)
1000
29
What is the primary purpose of a final report?
Answer
B
C
D
30
What is the current belief about the origin of the Universe?
Answer
(C)
The Big Bang theory
31
Which of the following involves the area of a triangle?
Answer
(A)
Calculate the area of a triangle or rectangle
32
Which instruments are useful for drawing angles?
Answer
(D)
Ruler, Protractor, and Compass
33
Who proposed that light was made up of millions of tiny 'corpuscles' (particles)?
Answer
(B)
Isaac Newton
34
In a graph, which of the following does a straight line typically represent?
Answer
(B)
A linear relationship
35
In what unit did Joule measure the link between work and heat?
Answer
(B)
Joules
36
What does it mean when values of X and Y are in direct proportion?
Answer
(B)
When X doubles, Y doubles
37
What is the purpose of wearing goggles in the lab?
Answer
(A)
To protect your eyes from splashes or flying debris.
38
What is the resultant force acting on the car?
Answer
(C)
1000 N
39
What is the significance of the Doppler effect in astronomy?
Answer
(B)
It helps to determine the speed and direction of celestial objects.
40
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.
41
How can you improve the accuracy when measuring the volume of liquid?
Answer
(A)
By reading at the correct angle
42
What is a key piece of evidence supporting the Big Bang theory?
Answer
(C)
Cosmic microwave background radiation
43
Which of the following are types of the measurements?
Answer
A
B
C
44
Describe how the student determines this time as accurately as possible.
Answer
A
B
C
45
Which of the following is a common form of mathematics in physics?
Answer
(C)
Understanding inverse proportions
46
In the context of astronomy, what is the primary application of the Doppler Effect?
Answer
(B)
To measure the movement of distant objects
47
What did Bohr introduce to explain the atom's stability?
Answer
(B)
Fixed electron orbits with specific energy levels
48
Which type of fire extinguisher is suitable for electrical fires?
Answer
(C)
Carbon dioxide extinguisher
49
Which statement about the resistances of X and Y is correct?
Answer
(B)
X has double the resistance of Y.
50
What should you do before switching on an appliance?
Answer
(A)
Check the voltage rating