Earth Moon and the Sun Class 7 MCQ
hardEarth Moon and the Sun Class 7 MCQ
Earth Moon and the Sun Class 7 MCQ
Question 1.
What causes day and night on Earth?
(a) The Earth's revolution around the Sun
(b) The Earth's rotation on its axis
(c) The tilt of the Earth's axis
(d) The Moon's orbit around the Earth
Answer:
(b) The Earth's rotation on its axis
Question 2.
During a solar eclipse, which celestial body is positioned between the Earth and the Sun?
(a) Venus
(b) Moon
(c) Star
(d) Mars
Answer:
(b) Moon
Question 3.
How long does it take for the Earth to complete one revolution around the Sun?
(a) 24 hours
(b) 30.5 days
(c) 365.25 days
(d) 12 months
Answer:
(c) 365.25 days
Question 4.
What phenomenon occurs when the Earth comes between the Sun and the Moon?
(a) Solar eclipse
(b) Lunar eclipse
(c) Planetary alignment
(d) Equinox
Answer:
(b) Lunar eclipse
Question 5.
Which of the following best describes the tilt of the Earth's axis?
(a) It is upright with respect to its orbit.
(b) It is tilted at an angle.
(c) It is perpendicular to the Sun.
(d) It does not affect seasons.
Answer:
(b) It is tilted at an angle.
Question 6.
Who is known as the father of modern Indian astronomy?
(a) Aryabhata
(b) M.K. Vainu Bappu
(c) Galileo Galilei
(d) Isaac Newton
Answer:
(b) M.K. Vainu Bappu
Case Study
I. The Solar Eclipse: A Celestial Phenomenon
A solar eclipse occurs when the Moon passes directly between the Earth and the Sun, blocking sunlight from reaching the Earth. This event can only happen during a new moon phase and is a spectacular sight for observers. Historically, solar eclipses were often met with fear and superstition, as people could not explain why the Sun would disappear. Today, scientists utilize these occurrences to study the Sun's corona and other phenomena that are otherwise difficult to observe.
Question 1.
What condition is necessary for a solar eclipse to occur?
(a) Full moon phase
(b) The Earth passes between the Sun and Moon
(c) The Moon passes between the Earth and the Sun
(d) The Sun moves closer to Earth
Answer:
(c) The Moon passes between the Earth and the Sun
Question 2.
Why are solar eclipses scientifically valuable today?
(a) They help forecast future earthquakes
(b) They reveal the Moon's internal structure
(c) They allow the study of the Sun's corona
(d) They explain the tides
Answer:
(c) They allow the study of the Sun's corona
Question 3.
A solar eclipse occurs only during the ............ moon phase.
Answer:
new
Question 4.
In the past, solar eclipses were often associated with ............ and superstition.
Answer:
fear
Question 5.
Solar eclipses occur when the Earth blocks sunlight from reaching the Moon. (True/False)
Answer:
False. (Solar eclipses occur when the Moon blocks sunlight from reaching the Earth)
II. The Lunar Eclipse: Earth's Shadow on the Moon
A lunar eclipse happens when the Earth positions itself directly between the Sun and the Moon, causing the Earth's shadow to fall on the Moon. This phenomenon can only occur during a full moon and can be seen from anywhere on the night side of the Earth. Unlike solar eclipses, lunar eclipses are safe to observe without special equipment. They provide valuable opportunities for astronomers to study the Moon's surface and the Earth's atmosphere, as the light that reaches the Moon during an eclipse is filtered through the Earth's atmosphere.
Question 1.
When does a lunar eclipse occur?
Answer:
A lunar eclipse occurs during a full moon when the Earth is positioned between the Sun and the Moon.
Question 2.
Why is it safe to observe a lunar eclipse without special equipment?
Answer:
Because the Moon doesn't emit intense light like the Sun, making it safe to view with the naked eye.
Question 3.
Explain how a lunar eclipse helps astronomers in their research.
Answer:
During a lunar eclipse, light passing through Earth's atmosphere reveals details about its composition. It also enhances visibility of the Moon's surface for observation and study.