Page 40 - e book prim 611
P. 40
Delta Modern Language Schools
Science department
Grade 6
1st term 2024- 2025
The properties of different states of matter
Solids Liquids Gases
• They are • They are substances • They are substances
substances that that have fixed volume that have variable
have fixed shape and variable shape. shape and volume
and volume.
• Their molecules are • Their molecules are
• Their molecules held together more not held together as
are held together loosely than molecules they are much more
tightly in their of solids. loosely than
positions. molecules of liquids.
• Their molecules move
• Their molecules faster than solids and • Their molecules
vibrate around slide over each other. move independently
their places.
• They have moderate in all directions..
• They have the thermal energy.
least thermal • They have the
energy. most thermal
energy.
Thermal energy is the movement of particles of an object.
Kinetic energy is the energy that molecules and atoms of a
substance has due to their motion.
Thermal energy of a substance is the total sum of kinetic energy of
its molecules and atoms.
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