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Activities

Science class activities



Explanation on how the Moon move around the Earth and how the Earth move around the Sun.


             
  

  Pupils draw the movement of the Moon and the Earth.
                      

                                           Discussion





Activity at home

Aim: to simulate and observe the phase of the Moon


Procedure:

1     This activity must be carried out in a dark room.
2     A stick is pierced through the centre of a polystyrene ball to represent the Moon.
3     An electric torch is placed in the room to represent the Sun.
4     The polystyrene ball is held by the observer at arm's length between the torch and his eyes.
5     The half surface of the ball facing the observer is observed.
6     The observations are recorded in the form of drawings.
7     Together with his arm, the observer turns 45 degree to the left (anticlockwise).
       He observes the surface of the ball facing him and records its apperarance.
8     Step 7 is repeated for all the other positions given in the following diagram.





















Inferences:

1     We see different parts of the Moon at different times because the angles between the Moon, the Earth and the Sun are changing all the time.

2     When the Moon is farthest from the Sun, half of the surface of the Moon is illuminated. This is known as the full moon.


Conclusion:

The phases of the Moon are caused by the movement of the Moon around the Earth and its changing position relative to the Sun.



Activity


Aim : To investigate the occurence of day and night due to the rotation of the Earth.

Procedure:

1     A globe and an electric torch are used to carry out the activity.
2     The apparatus is set up as shown below.














3     The globe is spinned slowly from the west to the east.
4     The observations are recorded.

Observation:














Inferences:

1     The side of the globe facing towards the torch is lighted. The light represents daytime.
2     The side of the globe facing away from the torch is in darkness. The darkness represents night-time.

Conclusion:

The rotation of the Earth on its axis causes the occurrence of day and night. 

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