Our Universe worksheet-3

Our Universe

21. Shadows are formed because:

(A) light is a form of energy

(B) light can be transmitted

(C) light travels in straight lines

(D) light can travel in space

22. An object casts a shadow when

(A) light passes through it.                 

(B) it absorbs light.

(C) it blocks the path of light.   

(D) light bends around the object.

23. Which of the following takes twenty four hours for one rotation?

(A) The sun on its axis                (B) The Earth on its axis

(C) The moon on its axis             (D) The solar system

24. How much time does the Earth take to complete one rotation?

(A) One hour                               (B) One year

(C) One day                                 (D) One week

25. A globe is a model of:

(A) the Sun        (B) the Moon    (C) the Earth    (D) Star

26. Identify the correct statement from the following.

(A) A new moon day is called purnima.

(B) Moon has light of it's own.

(C) The Sun is a star.

(D)A full moon day is called Amavasya.

27. The person in the figure given below travels in space. He is a/an:

(A) robot           (B) astronaut    (C) soldier         (D) Scientist.

28. Look at the shadows at different times of the day. Which of the following is/are correct?

(A)                           (B)

(C)                         (D) All of the above

29. Which of the following movements of the Earth causes day and night?

(A) The revolution of the Earth around the Sun.

(B) The rotation of the Earth around itself.

(C) The vibration of the Earth.

(D) The rolling of the Earth.

30. Which of the following allows light to pass through them?

(A) A metal plate                        (B) A piece of glass

(C)A book                                    (D) A piece of wood

Answer Keys:

(21)–(C); (22)–(C); (23)–(B); (24)–(C); (25)–(C); (26)–(C); (27)–(B); (28)–(D); (29)–(C); (30)–(B)