Q1. Which motion of the earth causes change in seasons?
Ans.
Q2. What is the shape of the Earth?
Ans.
Q3. How long does it take the earth to complete one rotation around its axis? Ans.
Q4. When do the sun rays fall directly on the equator?
Ans.
Q5. Why areas near the poles receive less heat?
Ans.
Q6. What causes change in seasons?
Answers
Answer:
1) Earth's tilted axis causes the seasons. Throughout the year, different parts of Earth receive the Sun's most direct rays. So, when the North Pole tilts toward the Sun, it's summer in the Northern Hemisphere. And when the South Pole tilts toward the Sun, it's winter in the Northern Hemisphere.
2) The shape of the Earth is Geoid. Referring to the shape of the Earth as Geoid, it basically implies 'Earth Shaped' or 'Oblate spheroid'. The Earth is flattened at the poles and bulges at the Equator.
3) The earth takes about 24 hours to complete one rotation around its axis. The period of rotation is known as the earthday. This is the daily motion of the earth.
4) On 21st March and September 23rd, direct rays of the sun fall on the equator. At this position, neither of the poles is tilted towards the sun; so, the whole earth experiences equal days and equal nights. This is called an equinox.
5) The areas near pole receive less heat because the sun rays are slanting at poles.
6The earth's spin axis is tilted with respect to its orbital plane. This is what causes the seasons. When the earth's axis points towards the sun, it is summer for that hemisphere.
Answer:
1. Rotation and Revolution
2.Spherical
3. 24 Hours
4. 21st March and 23rd September
5. Because the sun rays are slanting at poles
6. Due to Earth 's revolution and inclination of its axis
Explanation:
1. Rotation of earth around its own axis and revolution of earth causes change in season.
2.The shape of earth is spherical in shape.
3.The earth takes 24 hours to complete one rotation around its axis.
4. The sun rays fall directly on the equator on 21st March and 23rd September.
5. The areas near the poles receive less heat becaus e the sun rays are slanting at poles.
6. Due to Earth's revolution and inclination of its axis causes change in season.