Morning Star solutions for Total Geography [English] Class 9 ICSE chapter 3 - Rotation and Revolution [Latest edition]

What is meant by the earth’s axis?

Name the two chief motions of the earth.

Describe two characteristics of rotation.

Mention two effects of the rotation of the earth.

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.

Define ‘revolution’.

State two chief characteristics of the revolution of the earth.

Mention two effects of revolution.

What is meant by Summer Solstice? When do we have Summer Solstice in the Northern Hemisphere

What is meant by Equinox ? Give the dates of the two Equinoxes.

What will be the duration of daylight in the Northern Hemisphere on March 21st at 23°30′ latitude?

What is the relationship of seasons between the Northern and Southern Hemispheres?

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

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

Mention one effect of seasons in low and high latitudes.

Give reasons for the following
We always see the sun rising in the East.

Give a geographical reason for the following:

Norway is called the Land of the Midnight Sun.

Give reasons for the following
The speed of the rotation of the earth is greater at the Equator than at the Arctic Circle.

Give reasons for the following:
25th of December in New Zealand may be one of the hottest days of the year.

Give reasons for the following
The length of day and night is not equal at all places on the earth.

Give reasons for the following
The period of twilight and dawn increases polewards.

Give reasons for the following
Noon is hotter than morning.

Give reasons for the following
Days and nights are equal at all places on earth on March 21.

Give reasons for the following
Vertical rays are hotter than slanting rays.

Give reasons for the following
Though the earth is nearest to the sun in winter yet the winter is cool.

What is meant by rotation of the earth?

Discuss the effect of the rotation of the earth.

Describe the two interesting phenomena made by the circle of illumination viz., Solstice and Equinox.

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

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
(a) Equator,
(b) Tropic of Cancer.
(c) Tropic of Capricorn?

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

With the help of a diagram describe the heat zones.

Explain with the help of a diagram how the tilt of the earth’s axis and the revolution cause

1. seasons.
2. variation in the length of day and night; and
3. changes in the altitude of the midday sun at different times of the year.

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

Distinguish between :
Rotation and Revolution

Distinguish between :
Vertical and Slanting Rays.

Distinguish between :
Equinox and Solstice.

Distinguish between :
Twilight and Dawn.

Name the two movements of the Earth

How much time does the Earth take for one revolution?

State the direction of rotation of Earth.

Name the longest day in the Northern Hemisphere.

Name the shortest day in the Northern Hemisphere.

Name the longest day in the Southern Hemisphere.

Name the shortest day in the Southern Hemisphere.

On what dates are the days and nights equal throughout the world ?

At which latitude, is the Sun overhead on 21st June?

At which latitude is the Sun overhead on 22nd – December?

Name the two ends of the Axis of the Earth.

What is the speed of rotation at the equator?

Which country is known as the land of the ‘Midnight Sun’?

Which country is known as the land of the rising Sun?

What does the word equinox mean?

We always see the Sun rising in the East. Why?

What the word ‘Solstice means’?

When does the summer solstice occur ?

When does the winter solstice occur?

When is the spring equinox?

What do you mean by “Rotation of Earth”?

What is the Rotation of Earth's effects?

Give reasons for the following statement:
The Sun does not rise at the same time everywhere in the world.

Give reasons for the following statement:
The speed of rotation at Leningrad (60°N), Genoa (45°N) and Singapore (0°N) along the Earth’s axis is not the same.

Give reasons for the following statement:
We do not feel the great speeds of Earth’s rotation in day-to-day life.

Give reasons for the following Statement :
The areas, lying on the Equator, have their duration of day-light almost constant throughout the year.

Give reasons for the following statement :
The duration of day and night is equal everywhere on 21st March and 23rd September.

Give reasons for the following statement:
 Daylight decreases as we go polewards from March 21st to June 21st in the Southern Hemisphere

Give reasons for the following statement:
Beyond the tropics, the Sun is never overhead

Give reasons for the following statement:
On the 22nd of December, the altitude of the midday Sun at Colombo is different from that of Delhi.

Give reasons for the following statement:
The regions, near North Pole and South Pole, have six months of continuous day-light and darkness.

Give reasons for the following :
Twilight is of longer duration in higher latitudes than at Equator.

Give reasons for the following :
Altitude of the Sun varies at a place according to seasons

Give reasons for the following :
Seasons are reversed between Northern and Southern Hemisphere.

Give reasons for the following :
The duration of day and night is equal everywhere in the world on 21st March

Give reasons for the following :
Tropical latitudes are the hottest part of the’Earth.

Give reasons for the following
The period of twilight and dawn increases polewards.

Give reasons for the following:
25th of December in New Zealand may be one of the hottest days of the year.

Give reasons for the following
Noon is hotter than morning.

Give reasons for the following
Vertical rays are hotter than slanting rays.

Give reasons for the following:
There is no Twilight and Dawn on the Equator.

Give reasons for the following:
Sun rises on the east.

Give a geographical reason for the following:

Norway is called the Land of the Midnight Sun.

Give reasons for the following:
The speed of the rotation of the earth is greater at the Equator than at the Arctic Circle.

Give reasons for the following:
Winds are deflected to the right in Northern Hemisphere and to the left in Southern Hemisphere.

Give reasons for the following:
The variation in the lengths of day and night goes on increasing polewards.

What is Midnight Sun ? Where does it shine ?

Why are there seasons on earth?

Why are days longer than nights in summer?

Nearness to Sun is normally responsible for hot- weather conditions, but in July earth is farthest from Sun when it is hot in Northern Hemisphere. Why does reverse happen?

How is that the opposite seasons are found in Australia and India?

Why are days and nights equal throughout the world on 21st March and 23rd September?

Daylight increases as we go polewards in summer in The Northern Hemisphere. Why?

Account for the unequal length of day and night.

What are the effects of the inclination of the axis?

What are the results of the difference in the Earth’s speed of rotation at various latitudes?

Distinguish between the following pair :
Summer Solstice and Winter Solstice.

Distinguish between the following pair :
Solstice and Equinoxes

Define Rotation

 What is the period of rotation?

What are the effects of rotation?

What is revolution?

What is period of revolution?

What are aphelion and perihelion?

What are the effects of revolution?