Textbook Solutions: Movements of the Earth | Be an Explorer 5: Book Solutions, Notes & Worksheets - Class 5 PDF Download

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A. Tick (✓) the correct option to complete the sentence.

The Earth completes its one revolution in ______________.
(a) 364 days
(b) 3651/4 days
(c) 367 days
(d) 3651/2 days
Ans: (b)
The Earth takes approximately 365¼ days to complete one revolution around the Sun. This duration is the basis for our calendar year.

2. The rotation of the Earth causes ______________.
(a) change of seasons
(b) change of months
(c) day and night
(d) None of these
Ans: (c)
The rotation of the Earth on its axis is responsible for the occurrence of day and night. As the Earth rotates, different parts face the Sun, experiencing day, while the opposite side experiences night.

3. When it is winter in the Northern Hemisphere, there is ______________ Hemisphere.
(a) summer
(b) spring
(c) autumn
(d) night
Ans: (a)
When it is winter in the Northern Hemisphere, it is summer in the Southern Hemisphere. This is due to the tilt of the Earth's axis, which results in varying sunlight exposure in different hemispheres during different times of the year.

4. The Sun's rays fall directly on the Equator ______________.
(a) four times
(b) thrice
(c) once
(d) twice
Ans: (d)
The Sun's rays fall directly on the Equator twice a year during the equinoxes, resulting in equal day and night lengths all over the world.

B. Fill in the blanks.

1. The movement of the Earth on its axis is called the ______________.
Ans: rotation of the Earth.

2. The movement of the Earth around the Sun is called the ______________.
Ans: revolution of the Earth.

3. The Earth experiences four main seasons, namely: ______________ and ______________.
Ans: summer, winter, spring, and autumn.

4. The Earth revolves around the Sun in a fixed ______________ of the Earth.
Ans: orbit.

C. Write (T) for true statements and (F) for false statements.

1. The Earth rotates from east to west.
Ans: F
The Earth rotates from west to east.

2. All places on the Earth have day and night at the same time.
Ans: F
Due to the Earth's rotation, different places experience day and night at different times.

3. The revolution of the Earth causes seasons.
Ans: T
The tilt of the Earth's axis during its revolution around the Sun causes different seasons.

4. On 21 March, day and night are of equal length.
Ans: T
March 21 is one of the equinoxes when day and night are of equal length worldwide.

D. Match the columns A and B.

Ans:

Writing Zone

Answer the following questions.

Q1: Define the two movements of the Earth.
Ans: The two movements of the Earth are rotation and revolution. Rotation refers to the Earth spinning on its axis, causing day and night, while revolution is the Earth's orbit around the Sun, leading to the changing seasons.

Q2: How are days and nights caused?
Ans: Days and nights are caused by the rotation of the Earth on its axis. As the Earth rotates, different parts face the Sun, experiencing daylight, while the opposite side is in darkness, resulting in night.

Q3: How do seasons occur?
Ans: Seasons occur due to the tilt of the Earth's axis during its revolution around the Sun. This tilt causes varying amounts of sunlight to reach different parts of the Earth at different times of the year, creating the four main seasons: summer, winter, spring, and autumn.

Q4: When is the length of day and night equal throughout the world?
Ans: The length of day and night is equal throughout the world during the equinoxes, which occur around March 21 and September 23. On these days, the Sun's rays fall directly on the Equator, resulting in approximately equal day and night lengths globally.