Morning Star solutions for टोटल जियोग्राफी [इंग्रजी] इयत्ता ९ आयसीएसई chapter 3 - Rotation and Revolution [Latest edition]

Which of the following is true about the rotation of the earth?

See the above figure. What is the value of angle A?

An apparent outward force that acts on a rotating object:

Assertion (A): Rotation is the spinning of the earth on its axis from west to east once in 24 hours.

Reason (R): The earth is always tilted in the same direction as it moves round the sun.

Assertion (A): The winds and ocean currents move clockwise and are deflected to the right in the Northern Hemisphere.

Reason (R): Coriolis Effect refers to the force experienced by any object moving over the surface of a rotating body such as the earth.

What is the shape of the path of the earth around the sun?

Which of the following is correct?

What is the time difference between two consecutive lines of longitude?

Which of the following is true about the revolution of the earth around the sun?

Assertion (A): A bulge in the middle portion of the earth and flattened top at the poles.

Reason (R): Centrifugal force always directed outward, i.e., away from the axis of rotation.

Assertion (A): In the course of the earth's movement around the sun, the North Pole remains inclined towards the sun for a part of the year while the South Pole is tilted away from it.

Reason (R): The earth rotates on an inclined axis in an elliptical path around the sun.

Which of the following is true about the perihelion position of the earth?

The lighted part of the earth is called the ______.

Perihelion: 147.4 million km:: ______ 152 million km.

Which of the following is true about the aphelion?

Assertion (A): The speed of revolution of the earth is uniform.

Reason (R): When the earth is closer to the sun, the gravitational pull makes the earth move faster than when it is away from the sun.

Solstice: Summer/Winter:: _____ Spring/Autumn

Name the phenomenon when the regions beyond the Arctic Circle experience 24 hours daylight.

The period of diffused light between sunset and complete darkness is called ______.

The duration of twilight:

World Standard Time: 0° :: Indian Standard Time: ______.

Greenwich Mean Time: _____ :: Indian Standard Time: 12:00 pm.

Assertion (A): Phenomena of dawn and dusk is experienced more in temperate regions.

Reason (R): The twilight continues as long as sun is 18° below the horizon.

World Standard Time: ______ :: Indian Standard Time: Standard Meridian of India

What is meant by the inclination of earth's axis?

At what angle is the earth's axis inclined?

Name the two chief motions of the earth.

Describe two characteristics of rotation.

Mention any two possible consequences if the axis of the earth was vertical instead of inclined.

State one reason why we do not feel the motions of the earth.

What is an elliptic?

State two chief characteristics of the revolution of the earth.

What is perihelion?

What do you understand by aphelion?

On which two days are the days and nights equal all over the world and why ? What name do you give to these days?

Which is the longest and which is the shortest day in the Northern Hemisphere and why?

On which dates does the sunshine vertically overhead at Equator?

On which dates does the sunshine vertically overhead at the tropic of cancer?

On which dates does the sunshine vertically overhead at the tropic of capricorn?

Why is noon hotter than morning?

Why are days and nights equal at all places on earth on September 23?

What are the seasons in the Northern and the Southern Hemispheres on 23^rd September?

What is meant by Summer Solstice?

When do we have Summer Solstice in the Northern Hemisphere?

What is meant by Equinox? 

What will be the duration of daylight on March 21st at 23°30'N and 66°30'S latitudes? Give reason.

Briefly describe the cycle of seasons with the change in inclination of the sun's rays.

Which temperature zone receives almost vertical rays of the sun and which zones receive slanting rays?

How is the duration of twilight influenced by seasons?

How has the phenomenon of the ‘Midnight Sun’ come about?

Mention one effect of seasons in low and high latitudes.

Draw a well labelled diagram to show changes in the altitude of the midday sun at different times of the year.

Distinguish between:

Rotation and Revolution

Distinguish between:

Vertical and Slanting Rays

Distinguish between:

Equinox and Solstice

What is meant by rotation of the earth?

State three effects of the rotation of the earth.

What is the effect of the inclined axis of the earth on day and night?

Give a geographical reason Kuala Lumpur rotates faster on the earth's axis than London.

Give a geographical reason we always see the sun rising in the east.

Give a geographical reason Norway is called the Land of the Midnight Sun.

Draw a well labelled diagram to show inclination of the earth on its axis.

Describe how the duration of sunlight changes from the Equator to the Poles with respect to the angle of incidence during the solstices.

Describe how seasons are made and reversed between the Northern and Southern Hemispheres.

Give a geographical reason for the length of day and night is not equal at all places on the earth.

Give a geographical reason for the period of twilight and dawn increases polewards.

Give a geographical reason for the following:

In New Zealand Christmas is celebrated in summer.

Draw a well labelled diagram to show changes in the altitude of the midday sun at different times of the year.

Imagine the earth stops its rotation on its axis. What would be its impact on the inhabitants of the earth? Give examples to support your answer.

You travel for winter vacation to Australia from India. What type of climate will be there in Australia? Give reasons to support your answer.

On June 21, your uncle who lives in New York experiences summer, whereas your cousin who lives in Jakarta, experiences winter. Give reasons to support your answer.

With the help of a Power Point Presentation show change of seasons in the Northern Hemisphere.

With the help of a Power Point Presentation show the apparent path of the sun from the Equator to North Pole.

Draw a diagram to show the winter solstice and answer the following questions.

1. Name the correct date depicted in your diagram.
2. Name the latitude where the sun is shining vertically overhead.
3. Name the part of the globe where there is night on this date.
4. Name the latitude on which length of the day will be 24 hours.
5. Give the date when the earth will be directly opposite to the above position.
6. What will be the vertical position of the sun on that date?
7. What is the effect of the inclination of the earth upon the length of day and night?
8. What will be the probable length of day and night on that date?