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Physics for IGCSE & O level - The Earth In Space (Section 9)

1
What is the correct way to make the meniscus on a thermometer?
Answer
(C)
View it at eye level
2
What kind of graphs must be drawn for the test?
Answer
(B)
Line of best fit
3
What does the text specifically describe as stretching out in the context of the expanding universe?
Answer
(C)
Space
4
What are the necessary safety steps?
Answer
A
B
C
D
5
What should be considered when working with glassware?
Answer
(C)
Using the proper support like the tripod.
6
What should you be cautious about when touching a mains appliance?
Answer
(D)
All of the above
7
Which one of the following is a form of a fraction?
Answer
(D)
All of the above
8
When recording measurements, what must you include?
Answer
C
D
9
What is the current in the secondary coil? Assume that the transformer is 100% efficient.
Answer
(B)
1.0 A
10
What is CMBR in the context of the Big Bang?
Answer
(A)
Cosmic Microwave Back Radiation
11
What did Rutherford's experiments demonstrate about atoms?
Answer
(B)
Atoms are mostly empty space
12
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.
13
What is the definition of the 'period' of a pendulum?
Answer
(B)
The time for one complete swing.
14
What must you be careful with when dealing with electrical appliances?
Answer
(D)
All of the above.
15
Which of the following resources does NOT have the Sun as its main source of energy?
Answer
(A)
geothermal
16
What is the significance of a straight line graph?
Answer
A
B
C
17
What is meant by the period of the pendulum?
Answer
(B)
The time it takes for one full swing
18
If a paper is wet and is not drying quickly, how can you dry it?
Answer
(B)
Use a hairdryer
19
What is the size of the force that the man exerts on the cupboard?
Answer
(B)
50 N
20
When drawing a graph, what should you do with your results?
Answer
A
B
D
21
What is a constant variable?
Answer
(A)
A variable that doesn't change
22
Which statement best explains why copper is a better thermal conductor than glass?
Answer
(D)
In copper, there are free electrons that transfer the thermal energy.
23
Which variable should be placed on the X-axis?
Answer
(C)
The independent variable
24
What are key steps in planning and preparing for an experiment?
Answer
(D)
All of the above
25
How can you ensure the accuracy of a measurement?
Answer
(B)
Taking multiple readings
26
What safety measures should be in place when a gas flame is being used?
Answer
B
C
D
27
How do you support a beaker when heating?
Answer
(C)
Use a tripod and gauze.
28
What unit is suitable for speed?
Answer
(B)
m/s
29
What is the term used for the time it takes for a pendulum to complete one full swing?
Answer
(C)
Period
30
How can we describe the overall movement of galaxies that are very far from us?
Answer
(C)
They are moving away from us.
31
Which of the following are components of a good scientific experiment?
Answer
A
B
C
32
If you are studying the sun's image, what is safe?
Answer
(C)
Projecting its image onto a screen
33
Which of the following is an example of evidence supporting the Big Bang?
Answer
(B)
The observation of cosmic microwave background radiation
34
What is the relationship between redshift and the distance of a galaxy?
Answer
(C)
Redshift increases with distance.
35
What is the best way to improve the accuracy of an experiment?
Answer
(D)
All of the above.
36
Which item is often used as a safe support for glassware?
Answer
(B)
Tripod
37
Which statement about resistance is correct?
Answer
(B)
X has double the resistance of Y.
38
What do astronomers use to study the Big Bang theory?
Answer
(B)
Radio Telescopes
39
In a graph, what does the y-axis often represent?
Answer
(A)
The dependent variable.
40
When reading a scale, what is important?
Answer
(B)
To make sure the view is not obstructed
41
Before an experiment, what should be checked regarding the lab space?
Answer
(B)
If there are flammable substances near the heat sources.
42
What is the unit of distance used in the context of the expanding Universe?
Answer
(C)
Light year
43
Calculate the average speed of a drop of water?
Answer
(C)
1.2 m/s
44
What are the important aspects when reading the measurements?
Answer
A
B
C
D
45
Which of the following is a key feature of a good experimental method?
Answer
(A)
Taking multiple readings
46
What is the total amount of energy that is transferred as a result of the temperature difference called?
Answer
(C)
Thermal energy
47
Who is associated with the discovery of X-rays?
Answer
(D)
Wilhelm Röntgen
48
What is an important factor to consider when designing a parachute?
Answer
(D)
All the above
49
The student measures the time for the pendulum to swing from A to C. Describe how the student determines this time as accurately as possible.
Answer
A
B
C
50
In a lab, what should you do when you are unsure about a procedure?
Answer
(D)
Ask the instructor.