Page 41 - e book prim 611
P. 41
Delta Modern Language Schools
Science department
Grade 6
1st term 2024- 2025
Heat flows from a hotter substance to a colder substance.
Example:
If you hold ice cubes in your hand that has more thermal energy than the ice cubes,
so the ice cubes will melt because heat flows from your hand (hotter substance) to
the ice cubes (colder substance).
Temperature:
It is a measure of the average kinetic energy of molecules and atoms of
a substance.
When a substance is heated:
- Thermal energy is transferred to the molecules of the substance.
- Then, the molecules gain thermal energy and move faster and this
causes:
• The total kinetic energy of the molecules increases.
• The temperature of substance increases.
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