NCERT Solutions for Class 7 Science Chapter 12 - Earth, Moon and the Sun

Download Earth, Moon, and the Sun Class 7 Questions and Answers PDF

Students can download the full PDF for the chapter Earth, Moon, and Sun to revise all the main topics easily. It covers topics like lunar and solar eclipses, the rotation, and the revolution of Earth. The Earth, Moon, and the Sun Class 7 questions and answers PDF is simple to understand and can be used both online and offline for quick revision. The easy language of the NCERT Solutions for Class 7 makes learning effective.

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Access Class 7 Science Chapter 12 Earth, Moon, and the Sun Question Answer

The solved exercise questions are given below, which are given in easy and clear language. By referring to the Class 7 Science Chapter 12 Earth, Moon, and the Sun question answer, students can understand the concepts easily.

Question 1: In the Figure given below, how many hours of sunlight do the North Pole and the South Pole receive during one rotation of the Earth?

Answer:
The North Pole gets sunlight for 24 hours because it faces the Sun during that time. The South Pole remains in darkness for the full 24 hours as it is turned away from the Sun. This happens due to the tilt of the Earth’s axis, which changes how sunlight falls on different parts of the Earth.

Question 2: Fill in the blanks
(i) Stars rise in the _________ and set in the ___________.
(ii) Day and night are caused by the Earth’s __________________.
(iii) When the Moon fully covers the Sun from our view, it is called a _____________ solar eclipse.

Answer:
(i) East, West
(ii) rotation
(iii) total

Stars appear to rise in the east and set in the west. Day and night happen because the Earth rotates on its axis. When the Moon comes exactly in front of the Sun and hides it completely from view, it is called a total solar eclipse.

Question 3: State whether True or False
(i) A lunar eclipse occurs when the Sun comes between the Earth and the Moon.
(ii) Sunrise happens earlier in Gujarat than in Jharkhand.
(iii) In Chennai, the longest day occurs on the summer solstice.
(iv) We should watch the solar eclipse directly with our naked eye.
(v) Seasons occur due to the tilt of Earth’s axis of rotation and its spherical shape.
(vi) The Earth’s revolution around the Sun causes day and night.

Answer:
(i) False
(ii) False
(iii) True
(iv) False
(v) False
(vi) False

Question 4: Padmashree saw the Orion constellation nearly overhead at 8 pm yesterday. When will she see Orion overhead today?

Answer:
She will see Orion about 4 minutes earlier, around 7:56 pm today. This happens because Earth’s orbit around the Sun makes stars appear about 4 minutes earlier each night. As a result, stars and constellations appear slightly earlier every night, changing our view of the night sky bit by bit over the year.

Question 5: Nandhini saw a group of stars rising at midnight on 21 June. When will she see the same group of stars rising at midnight next year?

Answer:
She will see the same group of stars rising at midnight again on 21 June next year. This is because Earth takes around 365 days to complete one full orbit around the Sun, and the night sky repeats in a yearly cycle. So, stars appear in the same position again on the same date next year.

Question 6: Abhay noticed that when it was daytime in India, his uncle, who was in the USA, was generally sleeping as it was nighttime there. What is the reason behind this difference?

Answer:
This happens because the Earth rotates from west to east. So, when one side of the Earth faces the Sun, it is day there. The other side, which faces away, has night. India and the USA are on opposite sides of the Earth. That’s why when it’s daytime in India, it is night in the USA.

Question 7: Four friends used the following ways to see the solar eclipse. Who among them was being careless?
(i) Ravikiran used a solar eclipse goggle.
(ii) Jyothi used a mirror to project the Sun’s image.
(iii) Adithya saw the Sun directly with his eyes.
(iv) Aruna attended a program arranged by a planetarium.

Answer:
Adithya was being careless. Looking at the Sun directly, even during an eclipse, can seriously harm our eyes. It is very dangerous. The other friends used safe methods like eclipse goggles, mirrors, or attended a guided event where precautions were taken. We must always use proper safety methods to observe a solar eclipse.

Question 8: Fill in the circles in the figure appropriately with one of the following: Sun, Moon, Earth.

Answer:

In a solar eclipse, the Moon comes between the Sun and the Earth. In a lunar eclipse, the Earth comes between the Sun and the Moon. This blocks sunlight from reaching the Moon. These positions create different kinds of eclipses seen from Earth.

Question 9: The Moon is much smaller than the Sun, yet it can block the Sun completely from our view during a total solar eclipse. Why is it possible?

Answer:
Although the Moon is much smaller than the Sun, it is also much closer to Earth. From Earth, both appear almost the same size in the sky. So when the Moon moves exactly in front of the Sun, it can block the Sun completely for a short time. That is why we can see a total solar eclipse.

Question 10: The Indian cricket team's matches in Australia are often held in December. Should they pack winter or summer clothes for their trip?

Answer:
They should pack summer clothes. Australia is in the Southern Hemisphere, where seasons are opposite to those in India. December is winter in India, but it is summer in Australia. So, it will be hot there, and the players should carry light and comfortable clothes instead of woolen ones.

Question 11: Why do you think lunar eclipses can be seen from a large part of the Earth when they happen, but a total solar eclipse can be seen by only a small part of the Earth?

Answer:
Lunar eclipses can be seen from anywhere on Earth where the Moon is visible. This is because Earth’s shadow is large and can cover the Moon from many places. But a solar eclipse can only be seen where the Moon’s shadow falls. That’s why total solar eclipses are visible only in a narrow region.

Question 12: If the Earth’s axis were not tilted with respect to the axis of revolution, what would be the effect on seasons?

Answer:
If the Earth’s axis were not tilted, there would be no seasons like summer or winter. Every place would receive the same amount of sunlight throughout the year. The length of day and night would stay almost the same. There would be no major changes in weather during the year, and the concept of seasons would not exist.

Approach to Solve Earth, Moon, and the Sun Class 7 Question Answer

Understand the concepts thoroughly and apply them to answer questions effectively.

• Begin by knowing the concepts of rotation and revolution. It explains how these lead to day, night, and the changing seasons.

• Focus on the positions and movements of the Earth, Moon, and Sun. Students can refer to the Class 7 Science Chapter 12 Earth, Moon, and the Sun question answer.

• Practice answering questions by explaining processes step-by-step and supporting your answers with clear, labeled diagrams.

• Use diagrams to visualize the positions during eclipses and phases of the Moon. These diagrams are added in the Class 7 Science Earth, Moon, and the Sun question answer.

• Students can increase their understanding by referring to the NCERT Solutions for Class 7 Science. They can also perform simple activities or models (like using balls and a torch) to understand eclipses.

Also, check the NCERT Books and the NCERT Syllabus here:

• NCERT Books Class 7 Science

• NCERT Syllabus Class 7 Science

• NCERT Books Class 7

• NCERT Syllabus Class 7

Important Topics from Class 7 Science NCERT Chapter 12

The chapter "Earth, Moon, and the Sun" explains in simple words how these celestial bodies move and interact. Given below are the important topics from this chapter. To gain an understanding of these topics, students can refer to the NCERT Solutions for Class 7 Science Chapter 12 Earth, Moon, and the Sun.

• Rotation of the Earth

• Revolution of the Earth

• Phases of the Moon

• Solar Eclipse

• Lunar Eclipse

• Seasons

• Apparent Movement of Sun/Stars

• Tides

Important Questions from Class 7 Science NCERT Chapter 12

The Earth, Moon, and the Sun chapter explores how three celestial bodies cause day and night, and seasons. The NCERT Solutions for Class 7 Science Chapter 12 Earth, Moon, and the Sun also explain the phases of the Moon.

Question 1: Which phenomenon occurs when the Moon comes directly between the Earth and the Sun, blocking sunlight from reaching the Earth?

a) Lunar eclipse
b) Solar eclipse
c) New moon
d) Full moon

Answer: The correct answer is option (b) Solar eclipse

Explanation:

A solar eclipse happens when the Moon moves between the Earth and the Sun, casting a shadow on Earth and partially or fully blocking the Sun’s light from reaching certain areas. This can only occur during the new moon phase. In a total solar eclipse, the Moon completely covers the Sun as seen from a small area on Earth, while in other places, a partial eclipse is observed. This alignment is rare and brief, making solar eclipses special astronomical events.

Question 2: What causes the different phases of the Moon?

a) The Moon produces its own light
b) The Earth rotating on its axis
c) The changing positions of the Moon, Earth, and Sun
d) Clouds covering the Moon

Answer: The correct answer is option (c). The changing positions of the Moon, Earth, and Sun

Explanation: The phases of the Moon, such as new moon, crescent, and full moon, occur due to the relative positions of the Moon, Earth, and Sun. Different portions of the Moon appear illuminated as it orbits the Earth.

Question 3: How long does it take for the Earth to complete one revolution around the Sun?

a) 24 hours
b) 7 days
c) 1 month
d) 365 days

Answer: The correct answer is option (d) 365 days

Explanation: The Earth takes about 365 days to complete one full revolution around the Sun. This movement causes the change of seasons over the year.

Question 4: Why do we have different seasons on Earth?

a) Because of the Earth’s rotation only
b) Because of clouds and rain patterns
c) Because of the tilt of Earth’s axis and its spherical shape
d) Because of the Moon’s phases

Answer: The correct answer is option (c) because of the tilt of Earth’s axis and its spherical shape

Explanation: The tilt of the Earth’s axis causes different regions to receive varying amounts of sunlight during the year. This uneven sunlight leads to the four seasons: summer, winter, spring, and autumn.

Question 5: What is the main reason we experience day and night on Earth?

a) Earth revolving around the Sun
b) Earth rotating from West to East
c) Moon revolving around the Earth
d) Sun revolving around the Earth

Answer: The correct answer is option (b) Earth rotating from West to East

Explanation: Day and night occur because the Earth rotates on its axis. As it spins, some parts face the Sun (day) while others are away from it (night), creating the daily cycle.

What You Will Learn From Earth, Moon, and the Sun NCERT Solutions

This chapter helps students understand the relationship between the Earth, the Moon, and the Sun and how they affect our daily lives. Some of the main things that students learn are given below:

• It explains how the rotation of the Earth causes day and night.

• The phases of the Moon are clearly explained in the Earth, Moon, and the Sun Class 7 question answer.

• Students will also understand how solar and lunar eclipses occur and their scientific reasons.

• The importance of the Sun as the main source of light and energy is discussed in the Class 7 Science Earth, Moon, and the Sun question answer.

• Students will learn how the movement of these celestial bodies affects calendars and seasons.

Why Class 7 Science Chapter 12 Earth, Moon, and the Sun NCERT Solutions are Important?

The day, night, seasons, and tides are caused by the three heavenly bodies, which are the components of the main solar system. Going through the Earth, Moon, and the Sun chapter helps students understand the movement of the three celestial bodies and their impacts on the Earth.

• The Earth, Moon, and Sun chapter covers the topics of eclipses, tides, and seasons.
• Rotation, revolution, and the Moon's phases are also included, but these are studied in detail in Classes 9 and 11.
• The Class 7 Science Chapter 12 Earth, Moon, and the Sun NCERT Solutions are very useful because they help students to answer the conceptual questions in the competitive exams.
• Moreover, the chapter increases the students' curiosity about the solar system, space, and the celestial bodies.

NCERT Solutions for Class 7 Science Chapter-Wise

The chapterwise solutions are given below, by which students can easily understand the concepts and perform well in the exams: