1. THE EARTH IN THE SOLAR SYSTEM

Question 1

Which of the following celestial bodies emit their own light?

1 The Sun
2 The Moon
3 Stars
4 Planets
a) 1 and 3 only
b) 2 and 4 only
c) 1, 3, and 4 only
d) All of the above

Answer 1

Answer:
a) 1 and 3 only

Explanation:
The Sun and stars emit their own light. The Moon and planets reflect the light of stars.

Question 2

The term “planet” is derived from the Greek word “Planetai,” which means:
a) Celestial bodies
b) Shining objects
c) Wanderers
d) Stationary bodies

Answer 2

Answer:
c) Wanderers

Explanation:
Planets are called “wanderers” because they appear to move across the night sky relative to the fixed background of stars.

Question 3

2. The term “Pole Star” refers to a star that:
   a) Appears to move along with other stars in the sky.
   b) Changes its position in the sky over time.
   c) Remains fixed in its position in the northern sky.
   d) Shines brighter than all other stars in the night sky.

Answer 3

Answer:
c) Remains fixed in its position in the northern sky.

Explanation:
The Pole Star (North Star) appears stationary because it lies almost directly above the Earth’s rotational

Question 4

Which of the following planets have rings around them that can be seen using powerful telescopes?

1 Jupiter
2 Venus
3 Saturn
4 Uranus
a) 1 and 3 only
b) 2 and 4 only
c) 1, 3, and 4 only
d) All of the above

Answer 4

Answer:
c) 1, 3, and 4 only

Explanation:
Jupiter, Saturn, and Uranus have rings around them. Venus does not have rings.

Question 5

Which of the following is the primary reason why stars appear smaller and dimmer compared to the Sun?
a) They are made of different materials.
b) They emit less light than the Sun.
c) They are located much farther from Earth than the Sun.
d) They are partially blocked by the atmosphere.

Answer 5

Answer:
c) They are located much farther from Earth than the Sun.

Explanation:
Stars look small and dim because of their vast distance from Earth, although many are larger and brighter than the Sun.

Question 5

6. Which of the following statements regarding constellations is/are correct?

1 They are groups of stars forming recognizable patterns.
2 They are stationary and remain unchanged over time.
3 Saptarishi is a part of the Ursa Major constellation.
a) 1 and 3 only
b) 2 and 3 only
c) 1 and 2 only
d) All of the above

Answer 5

Answer:
a) 1 and 3 only

Explanation:
Constellations are patterns formed by stars, but the stars are not stationary; they move, though this motion is imperceptible over human lifetimes.

Question 6

Why can’t we see stars during the daytime?
a) Stars stop emitting light during the day.
b) The Sun’s brightness overwhelms the light from the stars.
c) Stars move to a different part of the sky.
d) The Earth’s shadow blocks the stars’ light.

Answer 6

Answer:
b) The Sun’s brightness overwhelms the light from the stars.

Explanation:
The intense brightness of sunlight scatters in the atmosphere, making the faint light of stars invisible during the day.

Question 7

9. What is the significance of the North Star in navigation?
   a) It is the brightest star in the night sky.
   b) It indicates the direction of the North Pole.
   c) It changes its position depending on the observer’s location.
   d) It moves across the sky in a fixed pattern.

Answer 7

Answer:
b) It indicates the direction of the North Pole.

Explanation:
The North Star is almost aligned with Earth’s rotational axis, making it a reliable indicator of the north direction.

Question 8

What distinguishes planets from stars in the night sky?
a) Planets twinkle, while stars do not.
b) Planets move relative to the background stars, while stars remain fixed.
c) Planets emit their own light, while stars reflect it.
d) Planets are visible only through telescopes, while stars are not.

Answer 8

Answer:
b) Planets move relative to the background stars, while stars remain fixed.

Explanation:
Planets move across the sky over time relative to the fixed positions of stars, earning them the name “wanderers.”

Question 9

Arrange the following celestial bodies in increasing order of their average distance from Earth:

1 Moon
2 Sun
3 Mars
4 Jupiter
a) 1, 3, 2, 4
b) 1, 3, 4, 2
c) 3, 1, 2, 4
d) 1, 2, 3, 4

Answer 9

Answer:
b) 1, 3, 4, 2

Explanation:
The Moon is closest to Earth, followed by Mars, Jupiter, and then the Sun.

Question 9

Which of the following constellations is most easily visible in the Northern Hemisphere during summer?
a) Orion
b) Ursa Major
c) Pegasus
d) Scorpio

Answer 9

Answer:
b) Ursa Major

Explanation:
Ursa Major, including the Saptarishi, is prominent in the Northern Hemisphere during summer.

Question 9

Which of the following explains why the Moon appears to have phases throughout the month?
a) The Moon’s rotation on its axis.
b) The varying distance of the Moon from the Earth.
c) The changing positions of the Moon, Earth, and Sun.
d) The Moon’s uneven surface reflecting sunlight differently.

Answer 9

Answer:
c) The changing positions of the Moon, Earth, and Sun.

Explanation:
Phases of the Moon occur because of the relative positions of the Moon, Earth, and Sun, which change as the Moon orbits Earth.

Question 10

Why do stars twinkle but planets do not?
a) Stars emit their own light, whereas planets reflect sunlight.
b) Stars are farther away, and their light passes through more atmospheric layers.
c) Stars move rapidly in the sky, causing their light to flicker.
d) Planets have smoother surfaces, preventing twinkling.

Answer 10

Answer:
b) Stars are farther away, and their light passes through more atmospheric layers.

Explanation:
The atmospheric refraction of light from distant stars causes twinkling. Planets, being closer, appear steadier as their light undergoes less refraction.

Question 11

The primary factor determining whether a celestial body is classified as a star or a planet is:
a) Its distance from Earth.
b) Its ability to emit its own light.
c) Its size and shape.
d) Its movement in the sky.

Answer 11

Answer:
b) Its ability to emit its own light.

Explanation:
Stars produce their own light through nuclear fusion, while planets reflect the light of stars.

Question 12

Which of the following features is unique to the Moon among natural satellites in the Solar System?
a) It has no atmosphere.
b) It shows the same face to its planet (Earth) at all times.
c) It orbits its planet in a circular path.
d) It reflects sunlight during the day and night.

Answer 12

Answer:
b) It shows the same face to its planet (Earth) at all times.

Explanation:
The Moon’s synchronous rotation ensures the same side always faces Earth.

Question 13

Which of the following celestial events is directly influenced by the Moon’s gravitational pull?
a) Eclipses
b) Tides on Earth
c) Auroras in polar regions
d) Formation of constellations

Answer 13

Answer:
b) Tides on Earth

Explanation:
The Moon’s gravitational pull creates tidal forces, leading to high and low tides on Earth.

Question 14

1. The Sun is primarily composed of which of the following gases?
   a) Oxygen and Carbon Dioxide
   b) Helium and Hydrogen
   c) Hydrogen and Nitrogen
   d) Helium and Methane

Answer 14

Answer:
b) Helium and Hydrogen

Explanation:
The Sun is mostly composed of hydrogen (about 75%) and helium (about 24%), with trace amounts of other elements.

Question 14

3. Which of the following statements about the Sun’s energy is correct?
   a) It is produced by nuclear fission in its core.
   b) It is produced by the fusion of hydrogen nuclei into helium.
   c) It originates from chemical reactions on its surface.
   d) It is a result of gravitational contraction.

Answer 14

Answer:
b) It is produced by the fusion of hydrogen nuclei into helium.

Explanation:
The Sun generates energy through nuclear fusion, where hydrogen nuclei combine to form helium, releasing massive amounts of energy.

Question 15

Which of the following facts about the Sun is incorrect?
a) The Sun is approximately 150 million kilometers away from Earth.
b) The Sun is the only star in the solar system.
c) The Sun’s energy comes from fission reactions in its outer layers.
d) The Sun is the ultimate source of heat and light for the solar system.

Answer 15

Answer:
c) The Sun’s energy comes from fission reactions in its outer layers.

Explanation:
The Sun’s energy is produced by fusion reactions, not fission, and occurs in its core, not the outer layers.

Question 16

Why does the Sun appear less hot to us than it actually is?
a) Earth’s magnetic field reduces the Sun’s heat.
b) The Sun’s heat dissipates in space.
c) The vast distance between the Sun and Earth reduces the heat felt.
d) Atmospheric absorption nullifies most of the Sun’s heat.

Answer 16

Answer:
c) The vast distance between the Sun and Earth reduces the heat felt.

Explanation:
Despite being intensely hot, the Sun’s heat diminishes by the time it travels the 150 million kilometers to Earth.

Question 17

How does the Sun support life on Earth?

By providing heat to maintain temperatures suitable for life.
By emitting ultraviolet radiation essential for photosynthesis.
By enabling the water cycle through its heat energy.
a) 1 only
b) 1 and 3 only
c) 2 and 3 only
d) 1, 2, and 3

Answer 17

Answer:
b) 1 and 3 only

Explanation:
The Sun supports life by providing heat and driving the water cycle. Photosynthesis primarily uses visible light, not ultraviolet radiation.

Question 18

. The Sun is classified as which type of star?
a) Red Giant
b) White Dwarf
c) Yellow Dwarf (G-Type Main-Sequence Star)
d) Supergiant

Answer 18

Answer:
c) Yellow Dwarf (G-Type Main-Sequence Star)

Explanation:
The Sun is a G-type main-sequence star, often referred to as a yellow dwarf.

Question 19

. Which of the following best explains why the Sun’s gravitational force is so strong?
a) It is the largest star in the galaxy.
b) It has an immense mass concentrated in a relatively small volume.
c) It is composed of dense, solid materials.
d) Its magnetic field amplifies its gravitational pull.

Answer 19

Answer:
b) It has an immense mass concentrated in a relatively small volume.

Explanation:
The Sun’s strong gravitational force arises from its massive size and density.

Question 20

10. If the Sun were to suddenly disappear, what would happen to Earth’s orbit?
    a) Earth would immediately leave its orbit and travel in a straight line.
    b) Earth would remain in orbit for 8 minutes before deviating.
    c) Earth would spiral closer to the position where the Sun was.
    d) Earth would continue orbiting due to inertia.

Answer 20

Answer:
b) Earth would remain in orbit for 8 minutes before deviating.

Explanation:
It takes about 8 minutes for light and gravitational effects from the Sun to reach Earth due to the finite speed of light and gravity propagation.

Question 21

Why is Venus referred to as Earth’s twin?
a) It has a similar atmosphere.
b) It is nearly the same size and shape as Earth.
c) It has a similar surface temperature.
d) It has the same orbital period as Earth.

Answer 21

Answer:
b) It is nearly the same size and shape as Earth.

Explanation:
Venus is called Earth’s twin due to its comparable size and shape, although its atmospheric conditions are vastly different.

Question 21

Which of the following planets is closest to the Sun and has the shortest orbital period?
a) Venus
b) Earth
c) Mercury
d) Mars

Answer 21

Answer:
c) Mercury

Explanation:
Mercury, being closest to the Sun, completes an orbit in just 88 days, the shortest among all planets.

Question 22

What is the primary reason Pluto was reclassified as a “dwarf planet”?
a) It does not orbit the Sun.
b) It lacks sufficient mass to clear its orbital neighborhood.
c) It is too far from the Sun to be considered a planet.
d) Its composition is primarily ice and rock.

Answer 22

Answer:
b) It lacks sufficient mass to clear its orbital neighborhood.

Explanation:
According to the International Astronomical Union (IAU), a planet must clear its orbit of other debris, which Pluto does not.

Question 23

4. Which of the following celestial objects is NOT considered a dwarf planet?
   a) Ceres
   b) 2003 UB313 (Eris)
   c) Charon
   d) Pluto

Answer 23

Answer:
c) Charon

Explanation:
Charon is a moon of Pluto, not a dwarf planet.

Question 24

Which planet in the solar system has the most moons?
a) Jupiter
b) Saturn
c) Uranus
d) Neptune

Answer 24

Answer:
a) Jupiter

Explanation:
As of current knowledge, Jupiter has the most confirmed moons among all planets in the solar system.

Question 24

Consider the following statements about planetary motion:

1 All planets revolve around the Sun in elliptical orbits.
2 The orbital speed of planets decreases with increasing distance from the Sun.
3 All planets rotate in the same direction as they orbit the Sun.
Which of the above statements are correct?
a) 1 and 2 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2, and 3

Answer 24

Answer:
a) 1 and 2 only

Explanation:
Planets revolve in elliptical orbits, and their orbital speed decreases with distance from the Sun. However, not all planets rotate in the same direction (e.g., Venus rotates in retrograde).

Question 25

Which of the following planets has a prominent ring system visible from Earth with the help of a telescope?
a) Uranus
b) Neptune
c) Saturn
d) Jupiter

Answer 25

Answer:
c) Saturn

Explanation:
Saturn’s ring system is the most prominent and can be easily observed with a telescope.

Question 26

9. Which of the following planets was once considered the farthest in the solar system before being reclassified as a dwarf planet?
   a) Neptune
   b) Pluto
   c) Eris
   d) Ceres

Answer 26

Answer:
b) Pluto

Explanation:
Pluto was considered the ninth planet of the solar system until 2006, when it was reclassified as a dwarf planet

Question 27

Which of the following dwarf planets is located in the asteroid belt?
a) Eris
b) Makemake
c) Ceres
d) Haumea

Answer 27

Answer:
c) Ceres

Explanation:
Ceres is the largest object in the asteroid belt and is classified as a dwarf planet.

Question 28

Why is the Earth described as a Geoid?
a) It is perfectly spherical in shape.
b) It is slightly flattened at the poles and bulging at the equator.
c) It is an irregular, rocky body with uneven terrain.
d) It has a perfectly symmetrical surface.

Answer 28

Answer:
b) It is slightly flattened at the poles and bulging at the equator.

Explanation:
The Geoid shape of Earth reflects its slightly flattened poles and bulging equator, caused by its rotation.

Question 29

Which of the following factors make Earth a unique planet in the solar system?

1 Presence of water in all three states.
2 Availability of life-supporting gases like oxygen.
3 Its perfect spherical shape.
a) 1 and 2 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2, and 3

Answer 29

Answer:
a) 1 and 2 only

Explanation:
The presence of water and life-supporting gases makes Earth unique. Its shape, however, is not perfectly spherical.

Question 30

What percentage of Earth’s surface is covered by water, making it appear blue from outer space?
a) About 50%
b) About 60%
c) About 67%
d) About 71%

Answer 30

Answer:
d) About 71%

Explanation:
Approximately 71% of the Earth’s surface is covered by water, giving it the “blue planet” appearance.

Question 30

Arrange the following planets in order of their size from largest to smallest:

1 Earth
2 Jupiter
3 Mars
4 Venus
a) 2-1-4-3
b) 1-2-3-4
c) 2-4-1-3
d) 3-2-1-4

Answer 30

Answer:
a) 2-1-4-3

Explanation:
Jupiter is the largest, followed by Earth, Venus, and MaRS

MOTHER MAKES VEGITABLE EDABLE

Question 30

6. Why is Earth often referred to as the “Blue Planet”?
   a) Its surface is entirely covered by oceans.
   b) It has the highest proportion of water among all celestial bodies.
   c) Its surface reflects blue light more efficiently than other colors.
   d) Two-thirds of its surface is covered by water, visible from space.

Answer 30

Answer:
d) Two-thirds of its surface is covered by water, visible from space.

Explanation:
The abundant water covering Earth’s surface reflects sunlight, giving it a blue appearance from space.

Question 30

Consider the following statements about Earth’s position in the solar system:

It is the third nearest planet to the Sun.
It is the fifth largest planet in the solar system.
It is located between Venus and Mars.
Which of the above statements are correct?
a) 1 and 2 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2, and 3

Answer 30

Answer:
d) 1, 2, and 3

Explanation:
Earth is the third planet from the Sun, the fifth largest, and situated between Venus and Mars.

Question 31

Which of the following factors contribute to only one side of the moon being visible from the Earth?
1 The moon takes the same time to complete one rotation on its axis as it takes to orbit the Earth.
2 The Earth’s gravitational force locks the moon in synchronous rotation.
3 The moon’s proximity to Earth compared to other celestial bodies.
Select the correct answer using the code given below:
a) 1 and 2 only
b) 2 and 3 only
c) 1 and 3 only
d) 1, 2, and 3

Answer 31

. Correct Answer: a) 1 and 2 only
Explanation:

The moon takes the same time to complete one rotation on its axis as it takes to orbit the Earth, a phenomenon called synchronous rotation. This ensures that only one side of the moon is always visible to us.
The Earth’s gravitational pull causes tidal locking, which is why the moon’s rotation and revolution periods match.
While the moon’s proximity to Earth makes it appear larger, it does not contribute to only one side being visible.

Question 32

Which of the following planets has the closest similarity in size and surface conditions to Earth?
a) Mars
b) Venus
c) Jupiter
d) Saturn

Answer 32

Answer:
b) Venus

Explanation:
Venus is often considered Earth’s twin due to its comparable size, though its surface conditions are much harsher.

Question 32

2. Consider the following statements about the moon:
   1 The moon is approximately 150 million kilometers away from the Earth.
   2 It has no atmosphere, making it incapable of supporting life.
   3 Shadows are formed on the moon’s surface due to its geographical features.
   Which of the statements given above is/are correct?
   a) 1 only
   b) 2 and 3 only
   c) 1 and 3 only
   d) 1, 2, and 3

Answer 32

Correct Answer: b) 2 and 3 only
Explanation:

1 The distance of 150 million kilometers is the Earth-Sun distance, not Earth-Moon. The moon is about 384,400 km from Earth.
2 The moon lacks an atmosphere, which makes it incapable of supporting life.
3 Shadows are visible on the moon’s surface because of its mountains, plains, and depressions. These features are easily observable during a full moon.

Question 33

5. Why does the moon appear larger than other celestial bodies visible in the night sky?
   a) It has a significantly larger diameter than all visible stars.
   b) Its distance from Earth is closer than that of any other celestial body.
   c) Its orbit around the Earth brings it closer during specific phases.
   d) Its surface reflects more light than any other celestial body.

Answer 33

Its distance from Earth is closer than that of any other celestial body.
Explanation:
The moon appears larger because it is much closer to Earth (384,400 km) than stars or planets, which are millions or billions of kilometers away. Its proximity makes it appear significantly larger, even though its actual size is smaller than many celestial bodies.

Question 33

Which of the following are examples of human-made satellites launched by India?
INSAT
IRS
EDUSAT
GSAT
Select the correct answer using the code given below:
a) 1, 2, and 3 only
b) 1, 2, and 4 only
c) 2, 3, and 4 only
d) 1, 2, 3, and 4

Answer 33

Correct Answer: d) 1, 2, 3, and 4
Explanation:

INSAT: Used for meteorology and telecommunications.
IRS: Indian Remote Sensing satellites for Earth observation.
EDUSAT: Used for education.
GSAT: A series of communication satellites by ISRO.
All the mentioned satellites are examples of human-made satellites launched by India.

Question 34

Which of the following statements are true regarding the Moon?
1 cThe moon has a significant atmosphere that can support life.
2 The moon’s surface is characterized by plains, mountains, and depressions.
3 The moon completes one revolution around the Earth in approximately 27 days.
The same side of the moon always faces the Earth due to synchronous rotation.
a) 1, 2, and 3 only
b) 2, 3, and 4 only
c) 1 and 4 only
d) 1, 2, 3, and 4

Answer 34

Correct Answer: b) 2, 3, and 4 only
Explanation:

The moon lacks a significant atmosphere, which means it cannot support life (statement 1 is incorrect).
The moon’s surface does indeed have mountains, plains, and depressions, which create shadows on its surface (statement 2 is correct).
The moon completes one revolution around the Earth in about 27 days (statement 3 is correct).
Due to synchronous rotation, the same side of the moon always faces Earth (statement 4 is correct).

Question 35

Which of the following statements about satellites is/are true?
1 Satellites are celestial bodies that move around planets.
2 Human-made satellites can be placed in orbit around the Earth for various purposes.
3 The moon is the only natural satellite of the Earth.
Satellites do not have any impact on the functioning of communication systems.
a) 1, 2, and 3 only
b) 2 and 3 only
c) 1, 2, and 4 only
d) 1, 2, 3, and 4

Answer 35

Correct Answer: a) 1, 2, and 3 only
Explanation:

Satellites are indeed celestial bodies that move around planets (statement 1 is correct).
Human-made satellites, such as INSAT, IRS, and GSAT, are placed in orbit around Earth for various purposes like communication, weather monitoring, etc. (statement 2 is correct).
The moon is the Earth’s only natural satellite (statement 3 is correct).
Satellites significantly contribute to communication systems, among other things (statement 4 is incorrect).

Question 36

Which of the following is/are true about the Sun?
The Sun is the largest star in the solar system.
The Sun’s distance from the Earth is approximately 150 million km.
The Sun generates energy through nuclear fission at its core.
The Sun provides heat and light essential for life on Earth.
a) 1, 2, and 4 only
b) 2 and 4 only
c) 1, 2, and 3 only
d) 1, 2, 3, and 4

Answer 36

Correct Answer: b) 2 and 4 only
Explanation:

The Sun is the largest star in our solar system, but it is not the largest in the universe (statement 1 is incorrect).
The distance of the Sun from Earth is approximately 150 million km (statement 2 is correct).
The Sun generates energy through nuclear fusion, not fission (statement 3 is incorrect).
The Sun indeed provides heat and light that are essential for life on Earth (statement 4 is correct).

Question 37

Which of the following is/are true regarding planets in the solar system?
1 All planets move around the Sun in circular orbits.
2 Venus is the hottest planet in the solar system due to its thick atmosphere.
3 Jupiter is the largest planet in the solar system by size and mass.
Pluto is still classified as a planet.
a) 1, 2, and 3 only
b) 2, 3, and 4 only
c) 1 and 3 only
d) 2 and 3 only

Answer 37

Correct Answer: d) 2 and 3 only
Explanation:

Planets move around the Sun in elliptical orbits, not circular (statement 1 is incorrect).
Venus is indeed the hottest planet due to its thick atmosphere and greenhouse effect (statement 2 is correct).
Jupiter is the largest planet in the solar system in terms of both size and mass (statement 3 is correct).
Pluto is no longer classified as a planet but as a “dwarf planet” (statement 4 is incorrect).

Question 38

Which of the following statements about the Earth is/are correct?
1 Earth is the fourth largest planet in the solar system.
2 has an atmosphere that supports life.
3 Earth is unique because it is the only known planet with liquid water on its surface.
Earth’s orbit around the Sun is perfectly circular.
a) 1, 2, and 3 only
b) 2 and 3 only
c) 1, 3, and 4 only
d) 2, 3, and 4 only

Answer 38

Correct Answer: b) 2 and 3 only
Explanation:

Earth is the fifth largest planet in the solar system, not the fourth (statement 1 is incorrect).
Earth’s atmosphere indeed supports life, with essential gases like oxygen and carbon dioxide (statement 2 is correct).
Earth is unique in having liquid water on its surface, which is essential for life (statement 3 is correct).
Earth’s orbit around the Sun is elliptical, not perfectly circular (statement 4 is incorrect).

Question 39

Which of the following is/are true about the Moon’s motion?
1 The moon revolves around the Earth in an elliptical orbit.
2 The moon’s rotation period is the same as its revolution period, causing one side to always face the Earth.
3 The moon causes tides on Earth by exerting gravitational forces.
4 The moon has no effect on the Earth’s climate.
a) 1, 2, and 3 only
b) 1, 2, and 4 only
c) 2 and 3 only
d) 1, 3, and 4 only

Answer 39

Correct Answer: a) 1, 2, and 3 only
Explanation:

The moon revolves around the Earth in an elliptical orbit (statement 1 is correct).
The moon’s rotation period is synchronized with its revolution period, causing one side to always face Earth (statement 2 is correct).
The moon’s gravitational pull causes tides on Earth (statement 3 is correct).
The moon does have some indirect effects on the Earth’s climate, although it is not a major driver (statement 4 is incorrect).

Question 40

Which of the following statements about asteroids is/are correct?
1 Asteroids are primarily found between the orbits of Mars and Jupiter.
2 Asteroids are believed to be remnants of a planet that exploded many years ago.
3 Asteroids are smaller than planets but larger than meteoroids.
4 Asteroids can only be found within the orbit of Jupiter.
a) 1, 2, and 3 only
b) 1 and 2 only
c) 2 and 3 only
d) 1, 2, 3, and 4

Answer 40

Correct Answer: b) 1 and 2 only
Explanation:

Asteroids are indeed primarily found in the asteroid belt between Mars and Jupiter (statement 1 is correct).
The theory that asteroids are remnants of a planet that exploded is widely accepted (statement 2 is correct).
Asteroids are larger than meteoroids but are typically smaller than planets, making statement 3 inaccurate.
Asteroids are primarily found between Mars and Jupiter, not only within the orbit of Jupiter (statement 4 is incorrect).

Question 41

Which of the following statements about meteoroids is/are true?
1 Meteoroids are pieces of rock that move around the Sun.
2 When meteoroids enter Earth’s atmosphere and burn up, they are known as meteors.
3 A meteoroid that survives the atmospheric burn and reaches the Earth’s 4 4 4 surface is known as a meteorite.
All meteoroids burn up completely before reaching the Earth.
a) 1, 2, and 3 only
b) 2, 3, and 4 only
c) 1, 2, and 4 only
d) 1, 2, 3, and 4

Answer 41

Correct Answer: a) 1, 2, and 3 only
Explanation:

1 Meteoroids are small pieces of rock that move around the Sun (statement 1 is correct).
2 When meteoroids enter Earth’s atmosphere and burn up due to friction, they are called meteors (statement 2 is correct).
3 If a meteoroid survives the atmospheric burn and reaches the Earth’s surface, it is called a meteorite (statement 3 is correct).
4 Not all meteoroids burn up completely before reaching Earth (statement 4 is incorrect).