estion n- 0
a) How are days and nights caused? (3)
b) What is the equator? (2)
c) What do you understand by the term orbit of the Earth? (2)
d) How many movements of the Earth are there? Name them. (2
e) Write the meaning of the 'hemisphere'. (1)
Answers
Answer:
a) Day and night are caused because of the rotation of earth around the sun.
b) An equator is an imaginary line around the middle of a planet or other celestial body.
c) An orbit is the path that an object takes in space when it goes around a star, a planet, or a moon.
d) The two main movements of the Earth are the rotation of the Earth around its axis (it takes 24 hours to complete one rotation), and the revolution of the Earth, or orbital motion, around the Sun (which takes 365 ¼ days, or 1 year, to complete).
e) one half of the earth
पृथ्वी का आधा भाग; गोलार्ध
Answer:
a)How are days and nights caused?
- The phenomenon of day and night is due to the rotation of a celestial body about its axis, creating an illusion of the sun rising and setting. Different bodies spin at very different rates, however. ... The planet Venus rotates once every 224.7 days – by far the slowest rotation period of any of the major planets.
b)What is the equator?
- An equator is an imaginary line around the middle of a planet or other celestial body. It is halfway between the North Pole and the South Pole, at 0 degrees latitude. An equator divides the planet into a Northern Hemisphere and a Southern Hemisphere.
c)What do you understand by the term orbit
c)What do you understand by the term orbit of the Earth?
- The International Space Station orbits Earth once every 90 minutes. ... An orbit is a regular, repeating path that one object in space takes around another one. An object in an orbit is called a satellite. A satellite can be natural, like Earth or the moon. Many planets have moons that orbit them.
d) How many movements of the Earth are
d) How many movements of the Earth are there? Name them.
- The two main movements of the Earth are the rotation of the Earth around its axis (it takes 24 hours to complete one rotation), and the revolution of the Earth, or orbital motion, around the Sun (which takes 365 ¼ days, or 1 year, to complete).
e) Write the meaning of the 'hemisphere'.
- A hemisphere is half of a sphere. ... Hemisphere comes from the Greek, and combines the prefix hemi-, for "half," with sphere, or "perfectly round ball." We talk about the earth as divided at the equator into the northern and southern hemispheres (or divided at the prime meridian into eastern and western hemispheres).