Mechara Secondary School (M/B Sad.2ffaa Machaaraa)

Vitamins Deficiency

🌀 Parts of the Eye 👁 Human eye has two chambers: 1.  Aqueous humor (anterior chamber): a watery fluid that fills the front chamber of the eye- 💧 Maintains the shape of the eyeball. 2. Vitreous humor: a jelly-like (semi-solid) substance that fills the area behind the len - 💧 Also maintains the shape of the eyeball. 👁 Human eye has three layers: 1. Sclera: the tough and white part of the eye, opaque external covering of the eye.     🛡 Important to protect and maintain the shape of the eyeball. 2. Choroid: the middle pigmented layer of the eye.     💉 Rich in blood vessels that supply nutrients and oxygen to the cells of the retina. 3. Retina: the inner layer of the eye.     🌟 Contains special light-sensitive photoreceptors called rods and cones. 👁 Other parts of our eye: a,Cornea: transparent front part of the sclera, important to bend light rays toward the retina. b, Pupil: the hole in the center of the iris through which light enters the eye. c, Iris: the colored part of the eye.       - In dim light:          -  Circular muscles contract                -  Radial muscles rela   -  Pupil becomes very small (it constricts)      - In bright light:                -  Circular muscles relax                -  Radial muscles contract                -  Pupil is pulled open wide (it dilates). d,Lens: a flexible disc that helps focus light on the retina.    -  Held in place by suspensory ligaments and the ciliary muscles. e,Suspensory ligaments: elastic-like structures that suspend the lens and pull the lens into shape for focusing distant objects onto the retina. f, Ciliary muscles: eye muscles that automatically contract and change the shape of the lens by changing the tension of suspensory ligaments. g, Optic nerve: the bundle of nerve fibers that transport nerve impulses from the retina to the brain.                     

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👉 DAILY REMINDER! ▬▬▬▬▬▬▬▬▬ 📚 2016 2nd sem.G 9_11 final exam is. loading!!! Only 7days left!!! ▬▬▬▬▬▬▬▬▬ G 12th Entrance_2016 is loading...... 20 DAYS LEFT!!!! ▬▬▬▬▬▬▬▬▬ 👉 Bor ganamaan Mbtti argamaa!! ▬▬▬▬▬▬▬▬▬ Fuuldura keetti Xiyyeeffadhu! Wanta Darbe Dhiisi! ┃Once it's past, Let Go. ༄ Wanta darbe deebisuu hin dandeessu! Takka darbe taanan, dhiisii deemi! Wanti darbe jiruu fi jireenya kee har'aa akka hin miine of eeggannoo godhi! "Wanta darbe hin darbatan" jedha Oromoon. Waan darbe haasa'aa hin oolin! Dhiisi! Waa'ee fuuldura kee haasa'i! Waa'ee mul'ata keetii ofirratti dubbadhu! Wanti darbe maaliif dhiibbaa hamaa sirratti uumaa? Maaliif si jeeqa? ❍ Namoonni baay'een muudannoo isaanii darbe sababeeffachuun jireenya jiraachuu danda'an akka jiraachuu hin dandeenyetti, naaf dhumeera jedhanii abdii kutannaa cimaa keessa seenu! Lakki dhiisi! Baga ta'e, "once it is past let go!" ❍ Yeroo baay'ee namoonni muudannoo isaanii darbeen dhiphachuun, akkasumas sammuu isaanii keessatti waan darbe irra deddeebi'anii ofitti hasaasuun, fuuldura isaanitti tarkaanfachuurraa duubatti of harkiisu! Namoonni akkasii milkaa'inaaf yookiin waan haaraa gochuuf itti ulfaata. 👉 Ergaan koo gabaabinaan: ➊. Miidhama kaleessaa dagadhu! ➋. Guyyaan dhufu kamiyyuu haaraa dha. Waan haaraa qabatee dhufa. Hojiidhaaf of qopheessi! ➌. Yeroon ati qabdu muraasa. Itti hojjadhu! ➍. Waan gochuu dandeessu of amansiisii hojjadhu! Itti hin gaabbin! ➎. Gaarii hojjadhu! Gaarummaan gara jireenya kee dhufaatii. ➏. Dogoggora sirreessi! Ariifadhuu dhiifama godhi! ➐. Namoota hundumaa waliin nagaadhan jiraadhu! ➑. Ciminaa fi hanqina kee adda baasii beeki! ➒. Gorsa namoota gurguddoo irraa fudhadhu! 👉 Ammaas Kan hubachuu qabdu:- 📚saffisa qabaachuu kee caalaa kallattii qabaachuu keettu barbaachisaadha. 👉adeemsa jiruu keessatti hin jarjarinis, hin aarinis, namas hin komatin yeroos hin komatin, atumti mataa kee of komadhu, yoo akkas goote bakka itti mucucaattee fi dogongorte argitaatii!. ▬▬▬▬▬▬▬▬▬▬▬▬ Har'aaf kanuma! Dirree Milkaa'inaarratti ol bahi! 👉Nagaa Ta'aa Yeroo Gaarii!!👌 Yours 👉 Seyidu J Ahmed

عيدكم مبارك!! تقبل الله منا ومنكم صالح الأعمال!! Iid Mubaarak!! Rabbi toltuu keenyaaf keessan nurraa haa Jaallatu. እንኳን ለ1445ኛው ኢድ አል አድሀ  በዓል በሰላም አደረሳችሁ!

📘EUEE 2008 Aptitude 1. If n = 9 x 28 x 26, which of the following is NOT an integer? A. n/18    B. n/32  C. n/21   D. n/36 Answer B 2. The sum of the first nine natural numbers (1, 2,.....,9) is A. 90     B. 55  C. 45     D. 100 Answer  c 3. If a + b = 10 and a - b = 5, then a2- b2 is equal to A. 50     B. 1/2  C. 5    D. 2 Answer A 4. In which of the following pair of number is the first number or expression necessarily less than the second number or expression? A. 3/7 ; 9/49 B. x/4 ; 14/x , for x > 0 C. (2/3)^2 ; 2 /(3^2) D. [(3/7)(24/25)]:1 Answer D 5. Which of the following fractions is greater than 3/4: and less than 5/6? A. 1/2     B. 4/5  C. 2/3     D. 9/10 Answer B 6.  (100 x 5^4) = ? A. 62500      B. 76600  C. 67000      D. 77200 Answer A 7. What decimal of an hour is a second? A. 0.0167    B. 0.000126  C. 0.0256    D. 0.00027 Answer    D 8. What least number should be added to 1056, so that the sum is completely divisible by 23? A. 18    B. 2     C. 3    D. 21 Answer  B 9. The largest 4 digit number exactly divisible by 88 is: A. 9768    B. 9988  C. 9944   D. 8888 Answer  C 10. The greatest number of four digits which is divisible by 15, 25, 40 and 75 is: A. 9600   B.9000  C. 9400  D. 9800 Answer  A 11. What is the missing number in the following series?  1, 9, 25, 49, (....) A. 54   B. 56   C. 81   D. 64 Answer  C 12. Which of the following is the largest fraction? A. 7/8  B. 3/4  C. 4/5   D. 7/9 Answer A 13. All of the following are ways to write 20 percent of N, EXCEPT A. 0.20 N     B. 20 N  C. 1/5 N    D. 20/100 N Answer B

#Africa Africa is the second largest continent (after Asia), covering about one-fifth of the total land surface of Earth. The continent is bounded on the west by the Atlantic Ocean, on the north by the Mediterranean Sea, on the east by the Red Sea and the Indian Ocean, and on the south by the mingling waters of the Atlantic and Indian oceans.

📚questions from euee and grade 10 matric /2000- 2015/ 1,What is the largest subatomic particles? 2,Ions are A. atoms of an element that have different numbers of protons B. atoms of an element that have different numbers of neutrons C.atoms that have a charge 2.What particles are found in the nucleus of an atom? A. protons and neutrons B.protons and electrons C.neutrons and electrons 3,Which subatomic particle has the smallest mass? A.proton B,neutron C,electron 4.Which subatomic particle has a charge of zero? A,proton B,neutron C,electron 5,Which subatomic particle has a charge of +1? A,proton B,neutron C,electron 6,Which section of an atom has the highest density? A,electron cloud B,nucleus C,all sections have the same density 7,The atomic number tells the A,number of electrons in the atom B,number of protons in the atom C,number of neutrons in the atom 8,The number of protons and neutrons in a nucleus is the A,atomic mass B,atomic number C,mass number 9,Nucleons are A,electrons and protons B,electrons and neutrons C,protons and neutrons 10,Where are the electrons in an atom located? A,nucleus B,atomic orbitals C,corona of the nucleus 11,. According to Dalton’s Atomic Theory, matter consists of indivisible _ a) Molecules b) Atoms c) Ions d) Mixtures 12,Atoms of different elements differ in mass. a) True b) False 13,What did Dalton’s Theory couldn’t explain? a) gaseous volumes b) conservation of mass c) chemical philosophy d) indivisible atoms 14,What is the name of Dalton’s publication? a) A New system of atomic Philosophy b) An old system of Chemical Philosophy c) A New System of Chemical Philosophy d) A New System of Chemical Prophecy 15,Which of the following may not be explained by Dalton’s atomic theory? a) reason for combining atoms b) conservation of mass c) chemical philosophy d) indivisible atoms 16,Law of conservation of mass isn’t explained in Dalton’s atomic theory. a) True b) False 17,All atoms of a given element have identical including identical _____ a) Properties, mass b) Weight, volume c) Volume, properties d) Temperature, pressure

📚Economics Common questions on micro and macro economics Instructions: Choose the best answer for each question. 1. Which of the following is a core concept in macroeconomics? a) Supply and demand b) Market equilibrium c) National income d) Consumer behavior Answer: c) National income 2. What is the primary focus of microeconomics? a) The behavior of individual consumers and firms b) The overall performance of the economy c) The role of government in the economy d) The effects of international trade Answer: a) The behavior of individual consumers and firms 3. Which of these is NOT a key macroeconomic indicator? a) Inflation rate b) Unemployment rate c) Gross Domestic Product (GDP) d) Market share of a particular company Answer: d) Market share of a particular company 4. What is the difference between a recession and a depression? a) A recession is a short-term downturn, while a depression is a prolonged and severe downturn b) A recession is caused by inflation, while a depression is caused by deflation c) A recession affects only a few industries, while a depression affects all industries d) There is no difference; the terms are interchangeable Answer: a) A recession is a short-term downturn, while a depression is a prolonged and severe downturn 5. What is the main goal of monetary policy? a) To regulate the money supply and interest rates b) To control government spending and taxation c) To promote fair competition in the marketplace d) To protect consumer rights Answer: a) To regulate the money supply and interest rates 6. What is the main goal of fiscal policy? a) To regulate the money supply and interest rates b) To control government spending and taxation c) To promote fair competition in the marketplace d) To protect consumer rights Answer: b) To control government spending and taxation 7. What is the concept of opportunity cost? a) The cost of producing a good or service b) The value of the next best alternative forgone c) The cost of borrowing money d) The cost of living Answer: b) The value of the next best alternative forgone 8. What is the law of supply? a) As the price of a good increases, the quantity supplied decreases b) As the price of a good increases, the quantity supplied increases c) As the price of a good decreases, the quantity demanded increases d) As the price of a good decreases, the quantity demanded decreases Answer: b) As the price of a good increases, the quantity supplied increases 9. What is the law of demand? a) As the price of a good increases, the quantity demanded decreases b) As the price of a good increases, the quantity demanded increases c) As the price of a good decreases, the quantity demanded increases d) As the price of a good decreases, the quantity demanded decreases Answer: a) As the price of a good increases, the quantity demanded decreases 10. What is market equilibrium? a) The point where supply and demand are equal b) The point where prices are at their highest c) The point where profits are maximized d) The point where production is maximized Answer: a) The point where supply and demand are equal 11. What is the difference between a price floor and a price ceiling? a) A price floor is a minimum price, while a price ceiling is a maximum price b) A price floor is a maximum price, while a price ceiling is a minimum price c) A price floor is set by the government, while a price ceiling is set by the market d) A price floor is set by the market, while a price ceiling is set by the government Answer: a) A price floor is a minimum price, while a price ceiling is a maximum price 12. Which of the following is a characteristic of a perfectly competitive market? a) Many sellers, each with a small market share b) Homogeneous products c) Free entry and exit d) All of the above Answer: d) All of the above