Class 7 Science - UP
Earth, Moon and the Sun
The chapter 'Earth, Moon and the Sun' for Class 7 UP Board science introduces students to the fascinating relationships between our planet, its natural satellite, and our star. Students will explore phenomena like day and night, the changing seasons, the phases of the Moon, and both solar and lunar eclipses. Understanding these cosmic movements is crucial for explaining daily natural cycles. This chapter is very important for the UP Board exams as it frequently features conceptual questions, diagram-based questions on eclipses, and short-answer questions that test foundational astronomical knowledge.
Start Learning FreeKey Concepts
Rotation of the Earth
The spinning of the Earth on its imaginary axis from west to east, which takes 24 hours and causes day and night.
Revolution of the Earth
The movement of the Earth around the Sun in a fixed elliptical path, which takes 365 and 1/4 days and causes changes in seasons.
Phases of the Moon
The different shapes of the illuminated side of the Moon as seen from Earth, changing over a period of about 29.5 days.
Solar Eclipse
A natural event that occurs when the Moon passes directly between the Sun and the Earth, blocking sunlight and casting a shadow on Earth.
Lunar Eclipse
An event that occurs when the Earth comes directly between the Sun and the Moon, blocking the Sun's light from reaching the Moon.
Important Formulas
Board Exam Info
In UP Board Class 7 Science exams, this chapter typically carries around 6 to 8 marks. Common question types include multiple-choice questions, fill-in-the-blanks, difference between solar and lunar eclipses, and drawing or labeling diagrams of eclipses and moon phases.
Frequently Asked Questions
What is the main difference between rotation and revolution?
Rotation is the spinning of Earth on its own axis causing day and night, while revolution is the movement of Earth around the Sun causing seasons.
Why do we always see only one side of the Moon?
The Moon rotates on its axis at the exact same speed that it revolves around the Earth, which is why the same side always faces us.
Can we look at a solar eclipse with naked eyes?
No, looking directly at a solar eclipse can permanently damage your eyes because of the harmful solar radiation; special solar filters or eclipse glasses must be used.
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