شرح ساينس الصف الخامس الابتدائي لغات مستر احمد الباشا
ساينس خامسة ابتدائي

لينك تحميل الملزمة
https://drive.google.com/file/d/1mpAg7mWYUt262KC_MKLERkSBI4Pk9tTg/view?usp=sharing

لينك تليجرام
https://t.me/mrahmedelbashagroup

In this part :
The moon have different phases (shapes( in the night sky due to :
- Earth's revolution around the Sun.
- The moon's revolution around Earth.
- Both Earth and the moon revolve together around the Sun.


Activity: To identify some phases of the moon by making model of Earth-moon-Sun system.
Tools:

Steps:
1. Put the lamp on a table, then push the pencil into the middle of foam ball as shown in the picture, where the lamp represents the Sun, foam ball represents the moon, and you represent Earth.

2.
- Turn on the lamp, then turn off the room lights.
- Hold the pencil with ball out at your arm's length as shown in the picture.

Observation
When you look at the ball (moon), you will see that lamp (sunlight) is shining on the side that not facing you from the ball (moon), this phase is "new moon".
3. Turn your hand about 45 degrees to the left by keeping your arm extended in front of your body.

Observation
When you look at the ball (moon), you will see that the right edge of the ball (moon) is bright, this phase is "crescent".

4. Turn your hand to the left by keeping your arm extended in front of your body, until the ball (moon) is directly opposite the lamp (the Sun) as shown in the picture.

Observation
When you look at the ball (moon), you will see that the ball (moon) is completely bright, this phase is "full moon".

5. Turn your hand to the left by keeping your arm extended in front of your body, until you see the phase of "crescent" again on the ball (moon) before you return to the original position that shows the phase of "new moon".

Observation
When you look at the ball (moon), you will see the "left" edge of the moon is bright, this phase is "crescent."

Conclusion
As the moon orbits Earth and both of them orbit the Sun, we can see different parts of the moon are sunlit, where:
- At new moon, we can't see the moon in the sky.
-At full moon, the moon appears like a completely bright circle in the sky.
The moon phases during the lunar month:
- The moon phases are changed during the lunar month which is also known as "Hijri month".
- The cycle of the moon phases (lunar phases) is repeated at the beginning of each lunar month as follows:


بالتوفيق
مستر احمد الباشا