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

لينك تحميل الملزمة
https://drive.google.com/file/d/1LqPTGHgLVw323U4vhnKabPzuIpMAhZlh/view?usp=sharing

لينك تليجرام
https://t.me/mrahmedelbashagroup

In This Lesson:
How does matter become warmer?
Matter gets warmer by transferring thermal energy from hotter matter to cooler one that is known as heat.
Example:
When hot food is left on a table for some time, it gets cold because the heat flows from the hot food to the cooler air around it.
So, heat is transferred when there is a temperature difference between two objects and it flows from the hotter object to the cooler one until both objects reach the same temperature that is known as thermal equilibrium.

The heat transfers from higher temperature object (A) to lower temperature object (B), until they are equal in temperature.

Experiment: to shows how thermal energy flows and how thermal equilibrium takes place.

Tools
Empty beaker - Beaker contains 100 ml. of hot water with temperature (60° C) - Beaker contains 100 ml. of cold water with temperature (10° C) - Thermometer - Spoon.

Steps
1. Record the temperature of water in beaker (60° C) and the temperature of water in beaker (10° C) in the table below.
2. Calculate the average temperature of water in the two beakers using the following rule
Then, record the average temperature of water in the table below.
3. Pour the two amounts of water in the empty beaker, then use the spoon to mix them together.
4. Wait for 3 minutes and measure the final temperature of the third beaker and record it in the table below.
5. Compare the final temperature of water to the average temperature of water that you have calculated before.



Observation
The final temperature of water (33° C) almost equals the average temperature of water (35° C) that you have calculated before.

Conclusion
When two substances with different temperatures come in contact with each other, thermal energy transfers from the hotter object to the cooler object until thermal equilibrium happens and they reach the same temperature.





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