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    the sun light primary four

    atwa
    atwa
    عضو فعال
    عضو فعال


    عدد المساهمات : 114
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    تاريخ التسجيل : 22/04/2009
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    the sun light  primary four Empty the sun light primary four

    مُساهمة من طرف atwa الأربعاء مارس 24, 2010 11:12 am

    Importance of sunlight اهمية ضوء الشمس

    *sunlight is important for plants to make their own food.
    -
    Sun is the main source of heat and light for all living organisms.
    -
    Green plants can make its food by photosynthesis

    the necessary conditions for photosynthesis الظروف الملائمة لعملية البناء الضوئى :

    1- Sunlightضوء الشمس
    2- Green substance in plant) chlorophyllالكلورفيل) )
    3
    - Water
    4-Carbon dioxide gas

    * The products of photosynthesis:
    1- Starch(food)نشا 2- Oxygen

    *the sun is considered as source of energy for plants

    *we can test presence starch by using iodine solution .
    Kinds of living organisms:
    Living organisms are classified into:
    1-Producersكائنات منتجة :
    Living organisms that can make their own food through process of photosynthesis.
    Ex: Green plantsalgaesome bacteria بكتيريا
    Importance give us food and oxygen.
    2-Consumers كائنات مستهلكة :
    Living organisms depending on producer's t to get their food directly or indirectly.
    Ex: Human - cows - lions - chicken - sharks.

    3-Decomposersكائنات محللة:
    Living organisms can't make their food they can get food by decomposing the organic wastes such as dead bodies of plants or animals.
    Ex: some types of bacteria and fungi.
    Importance of decomposer :

    1-increases soil fertility تذيد خصوبة التربة

    2- get rid of dead organisms.

    Q: what is meant by producers ?

    (B) Classify the following living organisms into:
    Producers, consumers and decomposers.
    Yoghurt bacteria - Human - Corn plant - Wild cat


    Producers

    Consumers

    Decomposers

    Write the scientific term for each following sentences:



    *. The living organisms that can make their own food by themselves through the process of photosynthesis. ( )

















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    the man
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    the sun light  primary four Empty رد: the sun light primary four

    مُساهمة من طرف the man الخميس مارس 25, 2010 5:05 pm

    Smile

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