شرح ساينس الصف السادس الابتدائي لغات - الفصل الدراسي الأول
شرح ساينس سادسة ابتدائي - ترم أول

لينك تحميل الملزمة
https://drive.google.com/file/d/1LypzcaUCAFnvRX_DC430W24zXc6U83Tm/view?usp=sharing

لينك تليجرام
https://t.me/mrahmedelbashagroup

In This Lesson:
► You have learned that energy can change from one form to another.
► In some cases, when energy changes from one form to another, there are some loss.
Example:
- When a bicycle go down a slide, its potential energy changes to kinetic energy.
- The bicycle stops after sometime because there is a friction between tires of
the bicycle and the road.
- So, some of the kinetic energy changes to thermal energy due to the friction.

► Imagine that you have designed a marble track as in the opposite picture,
where:
- If you put the marble at the top of the track, then leave it to move down the
track.
- You will observe that the marble will not reach the end of the track.

From the previous, you would notice that:
- At the top of the track, the marble has the most potential energy.
- As the marble moves down the track the potential energy changes to kinetic
energy.
- As the marble moves along the track, some kinetic energy changes to thermal
energy due to the friction between the marble and the track, that decreases the
speed of the marble, so it doesn't reach the end of the track.




بالتوفيق
مستر احمد الباشا