Earth Moon and the Sun Class 7 Extra Questions and Answers Science Chapter 12

By tackling these Class 7 Science Extra Questions and Class 7 Curiosity Chapter 12 Extra Question Answer Earth Moon and the Sun, students will build a solid foundation in the topic.

Class 7 Science Chapter 12 Earth Moon and the Sun Extra Questions

Class 7 Science Chapter 12 Extra Questions on Earth Moon and the Sun

Earth Moon and the Sun Class 7 Very Short Question Answer

Question 1.
In which direction the Earth rotates on its axis
Answer:
West to East.

Question 2.
How much time does Earth take to complete on rotation.
Answer:
Around 24 hours

Question 3.
What happens on the part where the light of the Sun falls?
Answer:
Day

Question 4.
What is called the process of moving Earth around the Sun?
Answer:
Revolution

Question 5.
How is the axis of the Earth?
Answer:
Tilted

Question 6.
What is the shape of the Earth?
Answer:
Elliptical

Question 7.
What is seen as the Sun rises in the sky?
Answer:
Light

Question 8.
What becomes visible after Sunset
Answer:
Stars

Question 9.
Around which star the big deeper seem rotating?
Answer:
Pole star

Question 10.
What is the main reason of season change?
Answer:
Tilt of the Earth on its axis.

Question 11.
How the Moon is related to the Earth
Answer:
Moon is natural satellite of the Earth.

Question 12.
Whose shadow falls on the Earth during solar eclipse.
Answer:
Moon’s shadow

Question 13.
Whose shadow’ falls on the Moon in lunar eclipse?
Answer:
Earth’s shadow

Question 14.
Which season is observed in June in northern hemisphere?
Answer:
Summer season

Question 15.
What is the length of the day in northern hemisphere in December?
Answer:
Very short/approximate zero

Earth Moon and the Sun Class 7 Short Question Answer

Question 1.
What is the reason of formation of day and night on the Earth?
Answer:
The Earth rotates from west to east on its axis. On which part the light of Sun falls is a day and night in opposite. Due to continous rotation of the Earth, day and night forms.

Question 2.
Why the Sun seems rising in the east? Answer: The Earth rotates west to cast on its axis, that is why the Sun seems rising in the east. Actually the Sun is stable, but its virtual movement is seen due to rotation of the Earth.

Question 3.
What is revolution?
Answer:
Movement of the Earth around the Sun is called revolution. It takes 365 days and 6 hours to complete one revolution. It is responsible for formation of year.

Question 4.
How is observation of big deeper seems? Answer: Due to rotation and revolution of the Earth, the big dipper seems to move around the pole star. After some hours its stars seems to changing their position.

Question 5.
Why does change of season take place? Answer: Because the axis of the Earth is tilted and it is continued when the Earth revolves around the Sun So. the rays of Sun falls on different angles, on different parts of the Earth, that is why the season changes.

Question 6.
Why days are longer in summer season on northern hemisphere?
Answer:
Northern hemisphere is tilted towards the Sun in June, so the rays of the Sun falls on Earth for longer time, due to it days are longer and nights are shorter. .

Question 7.
How does solar eclipse take place?
Answer:
When Moon comes between the Sun and the Earth, then it blocks the sunlight coming on the Earth. The shadow falls on the Earth is called solar eclipse.

Question 8.
How does lunar eclipse take place?
Answer:
When the Earth comes in between the Sun and the Moon, then shadow of the Earth falls on the Moon. This phenomenon is called lunar eclipse.

Question 9.
Why there is day for six months and night for six months in polar areas?
Answer:
Tilt of Earth’s axis and revolution is its reason, when the northern or southern hemisphere is tilted towards the Sun, the Sun will not set for 6 months.

Question 10.
How does the Moon cover sunlight completely?
Answer:
Because the Moon is closer to the Earth compared to the Sun. So the apparent size of it become equal to the Sun and the Moon, covered the sunlight.

Earth Moon and the Sun Class 7 Long Question Answer

Question 1.
Explain process of rotation of the Earth and its effects.
Answer:
The Earth rotates on its axis from west to east in approximately 24 hours. Because of rotation, the cycle of day and night forms. On the part, sunlight falls is a day and night in opposite part. Due to rotation of the Earth, the Sun seems rising in the east and setting in the west. Rotation affects, weather, temperature, and time zones.

Question 2.
What is revolution of the Earth? How does a year formed?
Answer:
The Earth moves around the Sun in an elliptical orbit, which is called revolution. The Earth completes one revolution in approximate 365 days and 6 hours, which forms a year. The extra 6 hours make a leap year, even, fourth year. Seasons are changed due to revolution and tilt of the Earth.

Question 3.
How does tilt of Earth on its axis is the reason of season change?
Answer:
The Earth is tilted on its axis, and this is stable during revolution too. When the northern hemisphere is tilted towards the Sun. then there is summer season and winter season in southern hemisphere. After 6 months, the situation reversed. Angles of sunrays and change in period of days results in different seasons.

Question 4.
Explain solar eclipse and its types.
Answer:
When the Moon blocks sunlight by coming in between the Moon, the Sun, this phenomenon is called solar eclipse. It is of two types :
(i) Total solar eclipse-When the Sun is completely covered by the Moon.
(ii) Partial solar eclipse-When the Moon covers some part of the sunlight. Solar eclipse can only take place on new Moon. Shadow of this phenomenon falls only on very small parts.

Question 5.
Explain process of lunar-eclipse.
Answer:
Lunar eclipse take place, when the Earth comes in between the Sun and the Moon. Shadow of the Earth falls on Moon and make it partial or totally darker. This event take place only on full Moon. Moon depends on the Sun for light, so when it comes in shadow of the Earth, it looks blur.

Question 6.
Why does period of day and night changes on different places?
Answer:
The main reason behind this is tilt of Earth on its axis, that is why the Sun rays falls on different places at different angles. Near poles the Sun seen for longer time in summer which makes days longer and in winters the Sun sets earlier, which makes nights longer. Near equator days and night arc approximately equal. Axial tilt and revolution are the main cause for it.

Question 7.
Explain the effect of both rotation and revolution movements of the Earth.
Answer:
The Earth have two mocments-rotation and revolution. Rotation caused to form day and night. The Earth rotates from west to cast on its axis, w hich makes the rising and setting of the Sun possible. In revolution, the Earth revolves around the Sun in around 365 days. Due to tilt in axis of Earth and revolution seasons are also changed. And change in angle of Sun rays, summer, w inter and rainy seasons are formed. Temperature, weather, winds and time-zone also depends on it. These both movements are essential for continuity of life on the Earth.

Question 8.
Explain-Formation, process and effects of seasons.
Answer:
Seasons arc mainly formed due to tilt of axis and revolution of the Earth. When the Earth is tilted towards the Sun on northern hemisphere then there is summer season and winter in southern hemisphere, after 6 months the situation reversed. The angle of rays of the Sun and period of day and night and seasons are affected by this. Due to seasons, temperature, wind, rain and crop-cycles are changed. It also affects bio-diversity, ecosystem and human life.

Question 9.
Write details about safe viewing of solar eclipse.
Answer:
Avoid viewing solar eclipse with naked eyes. Sunglasses, bionoculars or telescopes should be also avoided to view it directly.
Usually, astronomy organisations, such as planetaria and astronomy clubs hold eclipse viewing events during a solar eclipse. Participating in such events is the best w ax’ to observe a solar eclipse since the organisers not only provide specialised eye protection for solar viewing, but also offer scientific explanations.

Question 10.
Explain the changing view of night sky from the Earth with diagram.
Answer:
Every evening the Sun sets in the westward direction and the night sky becomes visible. As the Earth also revolves around the Sun continuously, the stars seen in the night sky after sunset gradually change ox er a year as xx e look in different directions.

Question 11.
Write details about effects of mutual movements of Suns Moon and the Earth.
Answer:
The Earth. the Moon and the Sun built a dynamic system. Rotation of Earth brought danight. hich helps to run life-cycle. Due to
revolution and tilt of Earth on axis forms seasons which impacts agriculture, climate and animal behaviour The Moon produces tides, which helps to maintain marine ecosystem. The Sun is the main source of energy, light and temperature. Events like eclipses provide opportunities for scientific research. The combined movement of these three make life possible on Earth.