Page 16 - ..Science E-book Prim.6 2024-2025 1st term part2_Neat - Copy

Gravity Wind

Attraction force of objects toward the Force comes from movement of air due
earth’s center. to the difference in temperature.

Vertical effect Horizontal effect

1- Falling of rain and snow to the ground. 1- Movement of water vapor and clouds
2- Flowing of streams and rivers. from one place to another.
3- Leakage of water down into the ground
2- Formation of wind and ocean
then to groundwater reservoirs. currents.
4- Helping in the movement of the
3- Determining the weather and
convection currents. regional climate.

Convection Condensation

It causes the rising of air temperature It happens when the rising air loses heat and
that contains water vapor cold-water vapor changes into water droplets

(formation of clouds)

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Second Term