ERCISES
Answer the following questions briefly.
Ha What is the angle of inclination of the earth's axis with its orbital plane?
(b) Define rotation and revolution.
What is a leap year?
e Differentiate between the Summer and Winter Solstice.
e)
What is an equinox?
Why does the Southern Hemisphere experience Winter and Summer Solstice
in different times than that of the Northern Hemisphere?
Answers
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a) 23.5 degrees
b)
- A rotation is a circular movement of an object around a center of rotation
- Revolution is the movement of one object around a center or another object.
c) A year, occurring once every four years, which has 366 days including 29 February as an intercalary day.
d)
- The day that the Earth's North Pole is tilted closest to the sun is called the summer solstice. ... It is also the day that the Sun reaches its highest point in the sky.
- The winter solstice, or the shortest day of the year, happens when the Earth's North Pole is tilted farthest from the Sun.
e) An equinox is commonly regarded as the instant of time when the plane of Earth's equator passes through the geometric center of the Sun's disk.
f) This happens because of the angle between earth's axis and its orbit. On 21st June, the sunlight falls directly on the Tropic of Cancer.
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