20 Questions
What is the most important source of light and heat for all life on Earth?
The Sun
What causes day and night on Earth?
Rotation of the Earth on its axis
What imaginary line connects the North Pole and South Pole and shows mid-day?
Greenwich / Prime meridian
At which latitude are the Tropic of Cancer and Tropic of Capricorn located?
23½° Northern latitude
During a solar eclipse, what passes between the Sun and Earth on one line?
The Moon
What is the main purpose of the Globe as a model of the Earth?
To display the geographical location of continents and oceans
What are the key features to be understood in relation to the Globe as a model of the Earth?
Poles and Equator
Based on the given information, what is the significance of observing the Pacific Ocean on both sides of a world map?
It demonstrates that the Earth is round in shape
Why is it mentioned that Earth is slightly flattened at the North and South poles and bulges in the middle?
To describe the actual shape of the Earth
What evidence supports the statement that the Globe is a true model of the Earth?
Satellite images showing the Earth's shape
What causes day and night on Earth?
Rotation on its axis
During which celestial event is the Northern Hemisphere tilted towards the Sun, leading to the longest day and shortest night?
Summer Solstice
What is the regular path of Earth's revolution around the Sun called?
Orbit
When does the Southern Hemisphere experience its longest night and shortest day?
Winter Solstice
What is the phenomenon called when the Moon passes behind Earth, entering Earth's shadow?
Lunar Eclipse
Which celestial globe was the first one built under the Mughal empire?
The first celestial globe
What is the difference between the globe's rotation around its axis and Earth's rotation?
The globe has a fixed needle, while Earth's rotation is an imaginary line
Which hemisphere does India belong to?
Southern Hemisphere
Where do the Arctic and Antarctic Circles lie in terms of latitude?
Arctic Circle at 23.5°, Antarctic Circle at 66.5°
What is the Prime Meridian also known as?
Greenwich Meridian
Study Notes
- The globe used in classrooms rotates like a top or potter's wheel, with countries, continents, and oceans shown in proportionate size.
- Earth's axis is an imaginary line passing through the North and South Poles, with no physical needle present.
- Oldest known terrestrial globe was made in 1492 by Martin Behaim, while the first celestial globe was built under the Mughal empire.
- Globe's rotation around its axis is different from Earth's rotation, as the former has a fixed needle, while the latter is an imaginary line.
- The globe is divided into two hemispheres by the Equator, with the Northern Hemisphere lying north and the Southern Hemisphere south.
- India is located in the Southern Hemisphere, while Antarctica is in the Southern Hemisphere and has the maximum number of continents.
- Latitudes are parallel lines drawn on the globe, with 0° at the Equator, and 90° at the North and South Poles. Important latitudes include the Arctic and Antarctic Circles, and the Tropics of Cancer and Capricorn.
- Longitudes, also called meridians, are imaginary lines connecting the North and South Poles, with 0° at the Prime Meridian (Greenwich) and 180° at the International Date Line.
- Earth is divided into Eastern and Western Hemispheres based on the Greenwich Meridian and the International Date Line.
- Longitudes measure the distance east or west from the Prime Meridian, and are equal in length but farthest at the Equator and meet at the poles.
- Latitudes and longitudes help determine a location's exact position, time, and climate.
- Andhra Pradesh is located between latitudes 12°N and 20°N, and longitudes 77°E and 84°E.
Test your knowledge about the movements of the Earth including rotation and revolution. Learn about the celestial bodies in the universe and their characteristics. Understand the impact of these movements on phenomena like day and night.
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