شرح ساينس الصف السادس الابتدائي لغات - الفصل الدراسي الثاني
شرح ساينس سادسة ابتدائي - ترم ثاني

لينك تحميل الملزمة
https://drive.google.com/file/d/11TGIGv0jZ18G1F63-TXvm25USKfo9Ppi/view?usp=sharing

لينك تليجرام
https://t.me/mrahmedelbashagroup

In This Lesson:
► Water exists in three states in nature which are solid (ice), liquid (water) and gas (water vapor).
► Water changes from one state to another when it gains or loses energy

Water Cycle
▌The Sun is considered the most important source that drives the water cycle.
▌Sunlight provides the energy needed to:
- Melting ice and changing it into liquid water.
- Evaporating liquid water to form water vapor.
- Generating the wind movement, where winds cause ocean currents that transport water to different locations on Earth.

▌Energy transfer in the water cycle leads to increasing or decreasing the levels of water in some lakes.
Example:
- There was a large salt lake in Turkey, over time this lake became like a small puddle and sometimes it dries up completely in summer.
- This lake hosts huge numbers of flamingos that
migrate and reproduce when the weather is warm.
- Flamingos feed on algae that found in the shallow water of this lake.

Energy Transfer in the Water Cycle?
The processes and steps that affect the water cycle, which are :
1. Evaporation process.
2. Condensation process.
3. Precipitation process.
4. Runoff.
5. Collection.

Evaporation process
It is the process in which matter changes from liquid state to gas state.
Condensation process
It is the process in which matter changes from gas state to liquid state.
Precipitation process
It is the process in which water falls on Earth in the form of rain, sleet, snow or
hail (snow pellets).
Runoff
It is the step in which water flows along the Earth's surface into the river and then into the ocean or sea.
Collection
It is the step in which rainwater falling on the Earth's surface is collected in different water bodies.

Distribution of solar energy:
▌The amount of the solar energy that reaches the Earth differs from one place to
another on the Earth's surface.
▌The distribution of the solar energy on the Earth's surface plays an important role
in evaporation process in the water cycle, where the regions on Earth's surface
can be classified into :
▌Hottest regions: They are regions in which the evaporation process is the greatest.
▌Moderate regions: They are regions in which the evaporation process is moderate.
▌Coolest regions: They are regions in which the evaporation process is the smallest.


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