Spsd General Science 2010 - P5 The Solar System
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SPSD P5 GENERAL SCIENCE 2010
ONLINE TEST - The Solar System
INSTRUCTIONS TO CANDIDATES
1. Do not spend too much time on this online test.
2. Choose the correct option (A, B, C, D or E) by clicking on the corresponding radio button.
3. For short answer questions, type out the closest answer as possible in the blanks.
3. Attempt all 20 questions in this test.
4. This test may be taken into consideration for grading as part of your CA1 (2010) marks.
Allocation Time: 25 minutes
Setter: Jonathan Peh
- 1.
Explain why the Earth can be seen from the space by Astronauts. (2 marks)
- A.
The Earth gives out its own light.
- B.
The Earth's crust which produces heat and light energy allows itself to be visible in space.
- C.
The Earth refracted light from the Sun to the Astronauts' eyes.
- D.
The Earth reflected light from the closest star to itself to the Astronauts' eyes.
- E.
The Earth reflected light from all the planets to the Astronauts' eyes.
Correct Answer
D. The Earth reflected light from the closest star to itself to the Astronauts' eyes.Explanation
The term "closest star" in option D refers to the Sun.
The term "refracted" in option C means the phenomenon of bending of light ray. (you will learn in secondary 2)Rate this question:
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- 2.
Water covers __________ of the Earth's surface. (2 marks)
- A.
3/4
- B.
1/2
- C.
6/7
- D.
1/3
- E.
1/4
Correct Answer
A. 3/4Explanation
Note!
Although Earth covers a large percentage of water, most of them are not for human consumption.Rate this question:
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- 3.
The Earth rotates _________________.(2 marks)
- A.
About its own axis sometimes.
- B.
About its own axis all the time.
- C.
In circles all the time.
- D.
In circles sometimes.
- E.
Randomly
Correct Answer
B. About its own axis all the time.Explanation
The Earth rotates all the while without pausing although cannot feel it. The term "axis" is an imaginary line that goes through the centre of the Earth, from the North Pole (N) to the South Pole (S).Rate this question:
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- 4.
The Earth takes __________ to make one complete rotation.(2 marks)
- A.
24 hours
- B.
26 hours
- C.
12 hours
- D.
11 hours
- E.
22 hours
Correct Answer
A. 24 hoursExplanation
The Earth takes 24 hours to make one complete rotation. This is known as a day and is the time it takes for the Earth to rotate once on its axis. This rotation is what causes day and night on Earth.Rate this question:
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- 5.
The Earth takes ____________ to make one revolution around the Sun.(2 marks)
- A.
About 265 days
- B.
About 300 days
- C.
About 600 days
- D.
About 452 days
- E.
About 365 days
Correct Answer
E. About 365 daysExplanation
The Earth takes about 365 days to make one revolution around the Sun. This is known as a year. The concept of a year is based on the Earth's orbit around the Sun, which takes approximately 365.25 days. To account for this extra quarter of a day, we have leap years every four years, where an extra day is added to the calendar in February.Rate this question:
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- 6.
What is a planet? (2 marks)
- A.
A rock that revolves around a star
- B.
A tiny object that revolves around a star
- C.
A gigantic object that revolves around a star
- D.
A rock that rotates around a star
- E.
A gigantic object that rotates around a star
Correct Answer
C. A gigantic object that revolves around a starExplanation
The correct answer is "a gigantic object that revolves around a star." This explanation aligns with the commonly accepted definition of a planet, which is a celestial body that orbits a star, is spherical in shape, and has cleared its orbit of other debris. The term "gigantic" implies that planets are significantly larger than other objects in their orbit, such as asteroids or moons. The term "revolves" indicates that planets move in an elliptical path around their star, rather than simply rotating on their axis.Rate this question:
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- 7.
The Moon revolves around the ______________.(2 marks)
- A.
Sun
- B.
Saturn
- C.
Uranus
- D.
Earth
- E.
Venus
Correct Answer
D. EarthExplanation
The Moon revolves around the Earth. This is because the Earth's gravitational pull keeps the Moon in orbit around it. The Moon takes approximately 27.3 days to complete one orbit around the Earth. This phenomenon is known as the Moon's revolution around the Earth.Rate this question:
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- 8.
The Moon is the _______________. (2 marks)
- A.
Earth's natural satellite
- B.
Earth's satellite
- C.
Earth's man-made satellite
- D.
Earth's display purposes for night scenery
- E.
Earth's substitute
Correct Answer
A. Earth's natural satelliteExplanation
A satellite is an object in space that revolves around another object. The term "natural" satellite means that it is already there, nobody have changed it.Rate this question:
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- 9.
The picture above shows a __________.(2 marks)
- A.
Crescent moon
- B.
Full moon
- C.
Half moon
- D.
New moon
- E.
Gibbous moon
Correct Answer
E. Gibbous moonExplanation
The picture above shows a gibbous moon. A gibbous moon is when more than half, but less than fully, of the moon's illuminated surface is visible from Earth. In the picture, we can see that more than half of the moon is illuminated, indicating that it is a gibbous moon.Rate this question:
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- 10.
It takes about ______________ for the Moon to go around the Earth once. (2 marks)
- A.
25 days
- B.
14 days
- C.
28 days
- D.
23 days
- E.
33 days
Correct Answer
C. 28 daysExplanation
The correct answer is 28 days because this is the average length of the lunar month, which is the time it takes for the Moon to complete one orbit around the Earth. This duration is also known as the synodic month. During this time, the Moon goes through its different phases, such as new moon, first quarter, full moon, and third quarter, which are visible from Earth.Rate this question:
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- 11.
The changes in the Moon's appearance are known as its ____________.(2 marks)
- A.
Cycles
- B.
Phases
- C.
Patterns
- D.
States
- E.
Periods
Correct Answer
B. PhasesExplanation
The changes in the Moon's appearance are known as its phases. The Moon goes through different phases as it orbits the Earth, which are caused by the changing positions of the Moon, Earth, and Sun. These phases include the new moon, crescent moon, first quarter moon, gibbous moon, and full moon. The phases of the Moon are a result of the varying amounts of sunlight that illuminate different parts of the Moon as seen from Earth.Rate this question:
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- 12.
Which planet has the largest mass in the Solar System?(2 marks)
- A.
Jupiter
- B.
Neptune
- C.
Mars
- D.
Sun
- E.
Earth
Correct Answer
D. SunExplanation
The sun has a diameter of 1.4 million km! The sun is also about 1 200 000 times bigger than the Earth in volume!Rate this question:
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- 13.
How many planets are there in the Solar System if there is an exclusion count of pluto?(2 marks)
- A.
10
- B.
9
- C.
8
- D.
7
- E.
6
Correct Answer
C. 8Explanation
The Sun and the Moon are not planets (Sun is a star, Moon is Earth's natural satellite) Therefore, there are only eight planets in the solar system namely, Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus and Neptune.Rate this question:
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- 14.
Why are Man-made satellites important?(i) Communication purposes(ii) Space Exploration(iii) Observations of the Earth(iv) Weather Forecasting (2 marks)
- A.
(iv) only
- B.
(i) and (iv) only
- C.
(i), (iii) and (iv) only
- D.
(ii), (iii) and (iv) only
- E.
All of the above
Correct Answer
E. All of the aboveExplanation
Man-made satellites are important for various reasons. They are used for communication purposes, allowing people to connect and communicate with each other across long distances. They are also crucial for space exploration, as they enable scientists to gather data and explore outer space. Satellites are also used for observing the Earth, providing valuable information about weather patterns, climate change, and other environmental factors. Additionally, satellites play a vital role in weather forecasting, helping meteorologists predict and monitor weather conditions. Therefore, all the given options (i), (ii), (iii), and (iv) are correct explanations for why man-made satellites are important.Rate this question:
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- 15.
Look at the picture below. What is the purpose of this huge device?(2 marks)
- A.
To send information in the form of radio signals to a communication satellite in space
- B.
To gather information to all household devices through internet
- C.
To make wireless communications
- D.
For tourist attractions
- E.
To connect a radio station
Correct Answer
A. To send information in the form of radio signals to a communication satellite in spaceExplanation
The purpose of this huge device is to send information in the form of radio signals to a communication satellite in space.Rate this question:
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- 16.
Patty is 12 years old. How many times has the Earth moved around the Sun since the day he was born?(2 marks)
- A.
6
- B.
12
- C.
24
- D.
28
- E.
365
Correct Answer
B. 12Explanation
Always remember that the Earth takes 1 year (365 days) to make one complete revolution around the Sun.Rate this question:
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- 17.
The experience of day and night cycle is due to the _____________________ that makes the Sun appear to move across the sky. (2 marks)
Correct Answer
rotation of the earth about its axis
rotation of the earth about its own axis
spinning of the earth about its axis
spinning of the earth about its own axisExplanation
Ans: rotation/spinning of the earth - not acceptedRate this question:
- 18.
Look at the picture below.There are lines in between each planet. State the name for this line. (2 marks)
Correct Answer
orbitExplanation
The lines in between each planet are called orbits. Orbits are the paths that planets and other celestial objects follow as they revolve around a central body, such as a star. These paths are typically elliptical in shape and are determined by the gravitational pull between the objects. The concept of orbits is fundamental in understanding the motion and dynamics of objects in space.Rate this question:
- 19.
How many rotations about its axis would the Earth have made from Muthu's 12th birthday to his 14th birthday?(2 marks)
Correct Answer
730Explanation
Mathematics' calculation involved here.Rate this question:
- 20.
How many revolutions around the Sun would the Earth have made in a decade?(2 marks)
Correct Answer
10Explanation
in a decade = 10 yearsRate this question:
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