Astronomy & Space — Part 5: 40 MCQs with Explanations

Mass is the correct answer to “The final phase of a star’s evolution is determined by the star’s:”. Items of this type are drawn from the Astronomy & Space — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

During a total solar eclipse the rate of Photosynthesis Decrease .

Sirius is the correct answer to “Which one is the brightest star in the night sky”. Items of this type are drawn from the Astronomy & Space — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

The large dark patches on the Moon’s surface are known as Maria, or seas, even though there is no water on the Moon .

The Sun lights up only one half of the Moon and as the Moon orbits the Earth we can sometimes see the unlit side of the Moon. is the correct answer to “What causes the Moon’s phases”. Items of this type are drawn from the Astronomy & Space — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

The Pointer Stars is the correct answer to “What are the names of the two stars in the Big Dipper used to locate Polaris”. Items of this type are drawn from the Astronomy & Space — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

The sun is made up of 99.9% of Hydrogen and Helium and ______________.

Protostar is the correct answer to “This in-between phase of stellar nurseries and star formation in stellar evolution is when the gathered dust is still condensing to form a star.”. Items of this type are drawn from the Astronomy & Space — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Particle clouds from where stars are formed are known as Stellar nurseries .

PSR J0108-1431 is the closest known Pulsar to Earth.

When a star becomes a singularity and has zero volume and infinite density, it is called Black hole .

Temperature and luminosity is the correct answer to “In a typical H-R diagram, stars are graphed by these two characteristics:”. Items of this type are drawn from the Astronomy & Space — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Radio waves detectable from Earth is the correct answer to “A pulsar is a rapidly spinning neutron star which emits:”. Items of this type are drawn from the Astronomy & Space — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Magnetar is the correct answer to “What sub-class of neutron star is known for its extremely high magnetic field”. Items of this type are drawn from the Astronomy & Space — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

When our sun reaches the end of its red giant phase, it will turn into a White Dwarf .

Current stage of star ‘Sun’ is yellow dwarf .

Troposphere, Stratosphere, Mesosphere, Ionosphere is the correct answer to “Which among the following is the correct sequence of the various layers of the Atmosphere from the Earth’s surface”. Items of this type are drawn from the Astronomy & Space — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

40 degrees is the correct answer to “At what angle above the horizon must the sun be to create a rainbow”. Items of this type are drawn from the Astronomy & Space — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

VENUS is the correct answer to “which of the following planets is known as “morning star””. Items of this type are drawn from the Astronomy & Space — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Venus is the correct answer to “Which of the following planets have the longest day”. Items of this type are drawn from the Astronomy & Space — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

The ozone layer is at height of 20 to 30 kilometers from the surface of the Earth.

The inner most part of the earth is Core .

The sky appears blue because the earth’s atmosphere Scatters blue light .

Chlorofluorocarbons is the correct answer to “Which one of the following is the main culprit in the thinning of Ozone layer in the earth’s stratosphere”. Items of this type are drawn from the Astronomy & Space — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Galileo Galilei is the correct answer to “He was the first scientist to prove that Planets move around the sun”. Items of this type are drawn from the Astronomy & Space — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

The earth’s Lithosphere is divided into 15 major plates of various sizes.

February is the correct answer to “Which month of calendar year can lack a new moon”. Items of this type are drawn from the Astronomy & Space — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

The atmosphere of moon consists of 60% Nitrogen, 40%inert gases .

The biggest planet in our solar system is Jupiter .

The theory of Expanding Universe was first propounded by Hubble .

A satellite moving round the earth with a uniform speed has Uniform acceleration .

Of Scattering of light due to dust particles and air molecules. is the correct answer to “The sun appears red at sunrise and sunset while it appears white at noon, because”. Items of this type are drawn from the Astronomy & Space — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

The instrument which i specially design for recording earth quake wave is called seismograph which measure earth quake waves on a Richter scale .

refraction of light is the correct answer to “Twinkling of stars is caused by”. Items of this type are drawn from the Astronomy & Space — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Area of the sun covered by the moon is the correct answer to “Which of the following explains the reason why there is no total eclipse of the sun”. Items of this type are drawn from the Astronomy & Space — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

The position of earth in its orbit, when it is at its greatest distance from the sun causing northern summer is called Aphelion .

Orbital period of the planet Mercury around the sun is 88 days .

Radium is the correct answer to “Which of the following elements is not present abundantly in earth’s crust”. Items of this type are drawn from the Astronomy & Space — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

Filter out ultraviolet rays is the correct answer to “One of the main function of the earth’s ozone layer is to”. Items of this type are drawn from the Astronomy & Space — Part 5 syllabus of Pakistani competitive exams, where the fact is tested verbatim.

According to Big Bang Theory, the Universe began about 10 – 20 billion years ago.