Class 5 Science Chapter 12 Observing the Sky Solutions

CHAPTER - 12

Observing the Sky

EXERCISE

(Question/Answer)

Highlights

(i) Fill in the blanks.

(ii) Match the following

(iii) Tick the correct option

(iv) Answer the following questions in brief.

(v) Answer the following questions.

Fill in the blanks

( Exercise )

1. A group of stars that appear to form a pattern in the sky is known as a ___________.

2. A planet is ___________ to us than the stars.

3. The planets are also known as ___________.

4. The pole star defines the ___________direction.

5. Stars _ but planets do not _.

Answer

(1) constellation

(2) closer

(3) wandering star

(4) north

(5) twinkle,twinkle.

B. Match the following:

( Exercise )

Answer:

(1) c,

(2) e,

(3) d,

(4) b,

(5) a.

Tick the correct option.

( Exercise )

1. The planet that can be (sometimes) seen in the evening sky, even with unaided eye, is-

2. The two stars, at the top of Ursa Major, are called-

3. The Cassiopeia is-
4. From the following, the object in the sky, that (apparently) moves least in a given time is-
4. From the following, the object in the sky, that (apparently) moves least in a given time is-
6. On closely observing some bright stars, for some hours, one finds that stars appear to move from-

Answer

(i) (c) Mercury

(ii) (d) Pointers

(iii) (d) a constellation visible in autumn.

(iv)(a) North Star

(v)(b) Venus

(vi) (a) east to west

Answer the following questions in brief.

( Exercise )

1. Why do, we usually not see the stars during the day?

Answer: we usually not see the stars during the day because of the brightness of the sun.

2. In which part of the sky are we likely to find Venus when it is visible as an evening star?

Answer: west direction.

3. State the cause of the apparent motion of the sun from east to west?

Answer: The cause of the apparent motion of the sun from east to west is because of the rotation of the earth on its axis from west to east.

4. Name the special star in the northern hemisphere. Why has it been useful for travellers?

Answer: Pole star or Dhruvtara is a special star present in the northern hemisphere.

This star, unlike other stars, appears to remain fixed at one place. Because of this special feature, this star has been useful to travellers.

Answer the following questions.

( Exercise )

1. Define the term ‘constellation’.

Answer: A constellation is a group of stars that appears to form some recognisable pattern or shape in the sky.

2. In what respects is, the pole star, different from other stars?

Answer: Pole star appears to remain fixed at one place while the other stars change their position in the night sky.

3. Write two points of difference between a planet and a star.

Answer: two points of difference between a planet and a star is given below:

Planet	Star
Planets do not twinkle.	Stars appear to twinkle.
A planet is closer to us than the stars.	Stars are very far from us as compare to planets.

difference between||

4. Why do stars appear to slightly shift their position in the night sky?

Answer: Stars appear to slightly shift their position in the night sky due to the rotation of earth on its axis from west to east.

5. Why do stars appear as points to us?

Answer: Stars are very far from us. Hence, they appear as points to us.

CHAPTER - 12

Observing the Sky

EXERCISE

(Question/Answer)

Highlights

(i) Fill in the blanks.

(ii) Match the following

(iii) Tick the correct option

(iv) Answer the following questions in brief.

(v) Answer the following questions.

Fill in the blanks

( Exercise )

1. A group of stars that appear to form a pattern in the sky is known as a ___________.

2. A planet is ___________ to us than the stars.

3. The planets are also known as ___________.

4. The pole star defines the ___________direction.

5. Stars ___________ but planets do not ___________.

Answer

B. Match the following:

( Exercise )

Tick the correct option.

( Exercise )

1. The planet that can be (sometimes) seen in the evening sky, even with unaided eye, is-

2. The two stars, at the top of Ursa Major, are called-

Answer

Answer the following questions in brief.

( Exercise )

1. Why do, we usually not see the stars during the day?

2. In which part of the sky are we likely to find Venus when it is visible as an evening star?

3. State the cause of the apparent motion of the sun from east to west?

4. Name the special star in the northern hemisphere. Why has it been useful for travellers?

Answer the following questions.

( Exercise )

1. Define the term ‘constellation’.

2. In what respects is, the pole star, different from other stars?

3. Write two points of difference between a planet and a star.

4. Why do stars appear to slightly shift their position in the night sky?

5. Why do stars appear as points to us?

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5. Stars _ but planets do not _.