3 SST MOVEMENTS OF THE EARTH

Question 1

Define

Rotation

Answer 1

The Earth spins around its axis taking 24 hours to complete one rotation

Question 2

Define

What causes day and Night?

Answer 2

The spinning motion of the Earth causes day and night.

Question 3

Define

What is the direction of rotation of the earth?

Answer 3

Earth spins from

West to East

Question 4

Define

Which place will have the day before the other?

Eastern Hemisphere or Western Hemisphere

Answer 4

Eastern hemisphere will have a day before the western hemisphere.

Because Earth spins from west to east.

Question 5

Define

Revolution

(of the earth)

Answer 5

The movement of the earth around the Sun on a fixed path called orbit is called Revolution.

Question 6

Define

Orbit

Answer 6

The fixed path on which the Earth moves around the sun is called its orbit.

Question 7

Define

How much time does the Earth take to complete one revolution around the Sun?

Answer 7

365 ¼ days

Question 8

Define

The circular orbit of all bodies of the Solar system resembles a geometrical shape.

What shape is it?

Answer 8

The shape of the Earth’s orbit and all other bodies in the Solar system is not circular.

The orbit is elliptical in shape.

Question 9

Define

Who first discovered that the shape of the Earth’s orbit around the sun in not Circular?

Answer 9

Johannes Kepler of Germany in 1600.

(pronounced yo HAN ess)

Question 10

Define

Leap Year

Answer 10

Every fourth year, an extra day is added to the month of February and it is called a leap year.

There are 366 days in the leap year and 29 days in the month of February instead of 28 days.

Question 11

Define

Earth takes 365 ¼ days to complete one revolution around the Sun.

How ¼ day are adjusted.

Answer 11

The quarter-day (¼) is difficult to calculate, therefore it is ignored for three years and one day ( ¼ + ¼ + ¼ + ¼) is added to the month of February and it is called a Leap year.

So in a leap year, there 366 days, and 29 days in the month of February instead of 28 days.

Question 12

Define

Leap Year

Answer 12

2016

Question 13

Define

Leap Year

Answer 13

2010

Question 14

Define

Four main seasons on the Earth

Answer 14

Summer

Autumn

Winter

Spring

Question 15

Define

Summer Solstice

Answer 15

It is a position of the earth in which the Northern Hemisphere is tilted towards the Sun.

Sun rays fall directly on the tropic of Cancer in the Northern Hemisphere.

Question 16

Define

Northern Hemisphere is tilted towards the sun.

Sun rays fall on the tropic of cancer.

Northern hemisphere experiences longer days and shorter nights.

Answer 16

Summer Solstice

21 June

Question 17

Define

What will be happening in the Southern hemisphere on 21 June?

Answer 17

On 21 June Northern hemisphere experiences Summer solstice.

Southern hemisphere experiences winter and the nights are longer and days are shorter.

Question 18

Define

Winter Solstice

Answer 18

The position of the Earth in which the northern hemisphere is tilted away from the Sun.

Days are shorter and nights are longer.

Sunrays fall directly over Tropic of Capricorn.

Southern hemisphere experiences summer.

Question 19

Define

On which dates the sun shines directly over the Equator?

Answer 19

21 March and 23 December

Question 20

Define

Equinoxes

Answer 20

Days on which Sun shines directly over the equator are called equinoxes.

Question 21

Define

On which dates, the length of days and night are equal in northern as well as southern hemisphere?

Answer 21

21 March and 23 Dec

Question 22

Define

The northern hemisphere has already experienced winter and is moving towards summer.

Answer 22

Spring

Question 23

Define

The northern hemisphere has already experienced summer and is moving towards winter.

Answer 23

Autumn