Question 1

Question 1: How do day and nigbt occur on the earth?

Accepted Answer

Day and night occur on the earth because of the earths rotation.

Question 2

Question 2: What term is used to describe the earth’s revolution around the sun?

Accepted Answer

The term orbital motion is used to describe the earth’s revolution around the sun.

Question 3

Question 3: How long does the earth take to do so?

Accepted Answer

The earth takes 365 days and 6 hours to complete one revolution.

Question 4

Question 4: In which hemispheres is our country located?

Accepted Answer

Our country lies in the northeastern hemisphere.

Question 5

Question 5: Why don’t the sun’s rays fall perpendicularly at all places on the earth?

Accepted Answer

The sun’s rays do not fall perpendicularly at all the places on the earth because the earth is not flat but spherical in shape.

Question 6

Question 1: Refer to the table above and state which are the longest days?

Accepted Answer

The longest days are from 19th June to 26th June.

Question 7

Question 2: What difference do you notice in the duration of the nights from 19th June to 28th June?

Accepted Answer

The duration of the nights keeps on increasing day by day.

Question 8

Question 3: What is the reason behind it?

Accepted Answer

The sun is now moving southwards.

Question 9

Question 4: How did you find out the duration of the night?

Accepted Answer

The duration of the day is subtracted from 24 hours to get the duration of the night.

Question 10

Question 5: Which two dates have days and nights of the same duration?

Accepted Answer

March 22 and September 23 have the same duration of days and nights.

Question 11

Question 6: With the help of the table, you saw how the duration of the day and the night changes. Do you think such a change occurs everywhere on the earth?

Accepted Answer

Yes, duration of day and night changes everywhere on the earth.

Question 12

Question 7: Use the above format to record the duration of daytime from 19th to 28th of every month from September to December.

Accepted Answer

Students should expected to attempt the activity & answer on their own.

Question 13

Question 1: If the position of the shadow on the wall moves towards the north, in which direction does the location of sunrise or sunset appear to shift?

Accepted Answer

If the position of the shadow on the wall moves towards the north, the location of sunrise or sunset will shift southwards.

Question 14

Question 1: The earth’s _______ has enabled us to measure time in terms of days. (revolution, rotation, orbital motion)

Accepted Answer

rotation

Question 15

Question 2: The earth rotates from _________ (north to south, east to west, west to east)

Accepted Answer

west to east

Question 16

Question 3: The Earth takes _______ hours to rotate around itself. (365,144, 24)

Accepted Answer

24

Question 17

Question 4: India lies in the ____ hemisphere. (northeastern, northwestern, southeastern)

Accepted Answer

northeastern

Question 18

Question 5: The ________of sunrise and the sunset on the horizon³ for the whole year keep on changing. (position, shadow, rotation)

Accepted Answer

position

Date	Sunrise	Sunset	Day	Night	Source of Information
19^thJune	06.01	19:18	13 Hrs. 16 Min.	10 Hrs. 44 Min.	Time and date
20^thJune	06.02	19:18	13 Hrs. 16 Min.	10 Hrs. 44 Min.	Time and date
21^stJune	06.02	19:18	13 Hrs. 16 Min.	10 Hrs. 44 Min.	Time and date
22^ndJune	06.02	19:18	13 Hrs. 16 Min.	10 Hrs. 44 Min.	Time and date
23^rdJune	06.02	19:19	13 Hrs. 16 Min.	10 Hrs. 44 Min.	Time and date
24^thJune	06.02	19:19	13 Hrs. 16 Min.	10 Hrs. 44 Min.	Time and date
25^thJune	06.03	19:19	13 Hrs. 16 Min.	10 Hrs. 44 Min.	Time and date
26^thJune	06.03	19:19	13 Hrs. 16 Min.	10 Hrs. 44 Min.	Time and date
27^thJune	06.03	19:19	13 Hrs. 15 Min.	10 Hrs. 45 Min.	Time and date
28^thJune	06.04	19:19	13 Hrs. 15 Min.	10 Hrs. 45 Min.	Time and date

Chapter 1 How Seasons Occur Part 1 Solutions