الصفحة الرئيسية صفحة الدروس الدرس التالى المنتدى

 

Food and living organism

Write the function of the following:

FoodJ

1)it provides the body with energy.

2-it builds the body.

3-it protects up the body.

4-it regulates the body s temprerature .

* Chlorophyll :

it absorbs the energy of sun light and converts it into chemical energy in photosynthesis process.

*photosynthesis process:

1)It is the main source of food for all organisms.

2)it purifies the from carbon dioxide gas and provides it with oxygen.

* Proteins :

1)buliding the tissues of the body.

2)help in growth.

*Carbohydrates (sugar and starch ):

1)provide the body with energy.

2)renew the activity of the body .

*Fats :

1)provide the body with energy.

2)renew the activity of the body .

* Vitamins :

1)protect the body from some diseases .

2)help the body to carry out its vital processes.

* Calcium and Phosphorus salts :

1)they help to strength the bones and teeth .

*Iron salts for human body :

They are the main elements  of blood structure.

* Water:

1-forming 2/3 of our body.

2-bulding up the body cells and tissues.

3- it regulates the body temprature.

4-it helps in swallow digest and absorb of food.

5-it takes part in structure of the blood.

* Give reasons :

1-    No starch is formed in the plant at night ?

- because sun light is necessary for photosynthesis  process and formation of starch.

2-the green leaves in plant perform photodynthesis process?

-because the green leaves contains chlorophyll that absorbs the energy of sun light .

3-people eat more food in winter?

-to release enough heat energy .

4-food like fuel for living organisms .?

-because food burns in presence of oxygen to produce the heat energy for all organisms.

5-The government is concerned about increasing green plant areas ?

-because :

1-green plants preform photosynthesis process to form food for all organisms.

2-they purify the air from carbon dioxide .

3-they provide the air with oxygen gas.

6-Photosynthesis process is the most important vital process in a plant?

-because ligth necssary for photsynthesis process.

7-Chlorophyll is important in photosynthesis process.

-because chlorophyll absorbs sun light for photsynthesis process.

8-photosynthesis process is the most important vital process in a plant?

-because in this process the plant makes  their food.

9-Children need a lot of proteins .

-to grow and build the cells and tissues of their body .

10-Food rich of iron salts are important to human body.

-because iron is  very imprtant in the blood s structure.

11-The percentage of carbon dioxide gas in air nearly constant although it is consumed in photosynthesis process

-because during the respiration and burning processes oxygen is used and carbon dioxide is produced .

 

** omplete :

1-food burns inside the …………… of man in the presence of ……….

2-……………. Is the source of energy for all living organisms .

3-vital activities need ……….

4-when food is broken in the body cells ……………,…………and ……….gas evolves.

5- food is necessary for ………………. And compensates for the loss of ……………..and……………….

6-The green plant leaf can be considered as the factory which makes ………… in plant .

8-During photosynthesis process ,the …………..dey absorbs ………… .

9- The colour of iodine solution turns ………..on adding to the leaf of a green plant .

10-Caustic soda is used to absorb …………..gas.

11-The gas that turns lime water cloudy is ……………..

12  Water  +………….                          Sugar +…………..

13-In  photosynthesis process the plant  gets  ………….gas  from air through ………….

14-In photosynthesis process , the plant absorbs ………… gas and releases ………….. gas.

15-In the body cells , food burns in the presence of ………….. to produce the ……… needed for the body and ……….. gas evolves .

16-Number of stomata on the lower  surface of a plant leaf is ………….. than that on the upper surface .

17-When iodine solution is added to starch , its colour turns ………….

18-In photosynthesis process ……….. energy is changed into ………. Energy .

19-The plant makes its own food in green parts especiaaly ………. Through a process called ……………….

20-Wheat granis are rich in ……………… but legumes are rich in ……………………….

21-Proteins are considered ……………. Substances but fats and starch are considered as a source of ……………..

22- …………. And ……………. Protect the body against some diseases .

23-Food rich of calicum and phosphorus salts are necessary for ………………and………..formation .

** Write the scientific term that indicates for each of the following :

1-The source of energy for living organisms.

2-a gas turns lime water cloudly or milky .

3-A gas which produced by burning food.

4-A gas neede to perform photosynthesis process.

5-A material  used to detect the presence of starch in green leaves.

6-The green plants that form their own food by themselves.

7-The gas produced in photosynthesis process.

8-Openings in the green leaves that allow for air containing carbon dioxide gas to enter the leaf.

9-A chemical substance used to absorb carbon dioxide gas from air.

10-A process only occurs in the green  leaves  of  plant.

11-Food  that leave a transparent spot when put on a piece of paper .

12-It provides the body with all nutrients that it needs in the right amounts .

13-The type of energy which makes our temperature constant.

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