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የ ስንተኛ ክፍል ተማሪ ናችሁ?

✅የ2018 ዓ.ም የ12ኛ ክፍል ብሔራዊ ፈተና ሰኔ ውስጥ ይሰጣል። " መጋቢት 15/2018 ዓ/ም ከቀኑ 11 ሰዓት 30 ላይ ሲስተሙን እንዘጋለን ፤ ከዚያ በኋላ ማንም መመዝገብ አይችልም " - እሸቱ ከበደ (ዶ/ር) 🗓 የ12ኛ ክፍል ብሔራዊ ፈተና መስጫ ትክክለኛ ጊዜው ገና ባይጸድቅም ፈተናው ሰኔ ውስጥ እንደሚሰጥ ተጠቁሟል ! የትምህርት ምዘና እና ፈተናዎች አገልግሎት የ12ኛ ክፍል ሀገር አቀፍ ፈተና ምዝገባ መጋቢት 15 ቀን 2018 ከቀኑ 11 ሰዓት 30 እንደሚጠናቀቅ፣ ያልተመዘገበ እንደማይፈተን በቲክቫህ ኢትዮጵያ በኩል አሳስቧል። የተቋሙ ዋና ዳይሬክተር እሸቱ ከበደ (ዶ/ር)፣ ለምዝገባ የተሰጠው የወር ጊዜ መሆኑን ገልጸው፣ " ሁሉም ተሯሩጦ መመዝገብ አለበት፤ ያልተመዘገበ ተማሪ ሳልመዘገብ አምልጦኝ ቢል ምንም ማድረግ አንችልም፤ ቀጣይ አመት ይፈተናል " ሲሉ አስጠንቅቀዋል። ወላጆችም ልጆቻቸው መመዝገባቸውን እንዲያረጋግጡ አስገንዝበው፣ " መጋቢት 15/2018 ዓ/ም 11 ሰዓት ተኩል ላይ ሲስተሙን እንዘጋለን፤ ከዚያ በኋላ ማንም መመዝገብ አይችልም " ነው ያሉት። በጀት ከተመደበ፣ ፈተና አስፈጻሚዎች ከተሰማሩ በኋላ አዲስ ተመዝጋቢ ቢቀርብ ለማስተናገድ እንደሚቸገሩ አስረድተዋል። ትክክለኛ ጊዜው ገና ባይጸድቅም ፈተናው ሰኔ ውስጥ እንደሚሰጥ ጠቁመዋል።  ተመዝጋቢዎች ከ9 እስከ 11 የተማሩበት ውጤት ሊኖራቸው እና አሁን ላይ 12ኛ ክፍል እየተማሩ ሊሆኑ እንደሚገባ ገልጸዋል። ድጋሚ ለሚፈተኑ ደግሞ 750 ብር ክፍያ በመፈጸም ከዚህ በፊት የተፈተኑበትን አድሚሽን ካርድ ማስገባት፣ https://register.eaes.et ላይ መመዝገብ እንዳለባቸው አሳስበዋል። ይህም 150 ብሩ ለምዝገባ፣ ለእያንዳንዱ ስድስት ፈተና 100 ብር ተደርጎ ተሰልቶ፣ ተፈታኞች " ቢያንስ ኮስት ሸር " እንዲያደርጉ እና  " ከፍዬ ነው " በሚል ለፈተናው ትኩረት እንዲሰጡ ታስቦ የተወሰነ መሆኑን ገልጸዋል። ተፈታኞች በመረጡበት የፈተና ማእከል መፈተን እንደሚችሉ ያስረዱት እሸቱ (ዶ/ር)፣ " ለምሳሌ አምና አርባምንጭ የተፈተነ ተማሪ፣ ዘንድሮ ወደ አዲስ አበባ መጥቶ ከሆነ ለመፈተን አርባምንጭ መሄድ ሳይጠበቅበት አዲስ አበባ ካሉ ትምህርት ቤት አንዱን መርጦ የግል ተፈታኝ ሆኖ ይፈተናል " ብለዋል። ቲክቫህ ኢትዮጵያ ትምህርት ሚኒስቴር 💠 🔴ተጨማሪ ትምህርታዊ መረጃ ለማግኘት ቻናላችን ይቀላቀሉ! ✈️https://t.me/Tmhrt_Minister ✈️https://t.me/Tmhrt_Minister

Happy Eid al-Fitr! 🌙 May this blessed day bring you joy, peace, and countless blessings. May your prayers be answered, your heart be filled with happiness, and your home be filled with love. Eid Mubarak to you and your family!😍

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Physics Grade 12 Unit 3: Fluid Mechanics 1. Which of the following best defines a fluid? A) A substance that has a fixed shape and volume B) A substance that resists shear stress C) A substance that yields to sideways or shearing forces D) A substance that only exists as a gas Answer: C 2. The SI unit of pressure is: A) Newton (N) B) Joule (J) C) Pascal (Pa) D) Watt (W) Answer: C 3. Absolute pressure is equal to: A) Gauge pressure minus atmospheric pressure B) Atmospheric pressure only C) Gauge pressure plus atmospheric pressure D) Zero in a vacuum Answer: C 4. A mercury barometer is used to measure: A) Gauge pressure B) Blood pressure C) Atmospheric pressure D) Absolute pressure in a closed tank Answer: C 5. According to Archimedes’ principle, the buoyant force on an object submerged in a fluid is equal to: A) The weight of the object B) The volume of the object C) The weight of the fluid displaced by the object D) The density of the fluid Answer: C 6. An object will float in a fluid if: A) Its density is greater than the fluid’s density B) Its weight is greater than the buoyant force C) The buoyant force equals its weight D) It is made of metal Answer: C 7. What happens to the pressure at a point in a liquid as depth increases? A) It decreases linearly B) It remains constant C) It increases linearly D) It depends on the container’s shape Answer: C 8. The pressure at a given depth in a fluid is independent of: A) The density of the fluid B) The acceleration due to gravity C) The shape or size of the container D) The depth itself Answer: C 9. Specific gravity is defined as the ratio of: A) Mass of a substance to its volume B) Density of a substance to the density of water at 4°C C) Weight of a substance to its mass D) Volume of a substance to that of an equal mass of water Answer: B 10. If an ice cube floats in water, what fraction of it remains above the surface? (Given: ρ_ice = 917 kg/m³, ρ_water = 1000 kg/m³) A) 8.3% B) 17% C) 91.7% D) 100% Answer: A 11. Pascal’s principle states that: A) Pressure decreases with depth B) Pressure applied to an enclosed fluid is transmitted undiminished to every portion of the fluid C) Buoyant force depends on object shape D) Fluids cannot be compressed Answer: B 12. In a hydraulic lift, a small force applied on a small piston can lift a heavy load on a larger piston because: A) Energy is created B) Pressure is the same on both pistons C) The fluid is compressible D) Gravity is stronger on the larger piston Answer: B 13. Which instrument uses Pascal’s principle in its operation? A) Thermometer B) Hydrometer C) Hydraulic brake system D) Voltmeter Answer: C 14. The apparent weight of a submerged object is less than its actual weight due to: A) Friction B) Buoyant force C) Surface tension D) Viscosity Answer: B 15. If two immiscible liquids of different densities are placed in the same container, the liquid with higher density will: A) Float on top B) Mix uniformly C) Settle at the bottom D) Evaporate faster Answer: C 16. The pressure difference between two points in a static fluid depends on: A) Horizontal distance between them B) Color of the fluid C) Vertical height difference D) Container material Answer: C 17. Why does a ship made of iron float on water? A) Iron is lighter than water B) The ship’s average density is less than that of water C) Water repels iron D) Magnetic forces keep it afloat Answer: B JOIN SHARE REACT KNOWLEDGE HUB

Biology Grade 11 Unit 5

1. Which of the following correctly matches a muscle type with its control mechanism and primary location? A) Skeletal muscle – involuntary – walls of intestines B) Smooth muscle – voluntary – attached to bones C) Cardiac muscle – involuntary – heart wall D) Skeletal muscle – involuntary – heart wall Answer: C Explanation: Cardiac muscle is found only in the heart and functions involuntarily. Skeletal muscles are voluntary and attached to bones; smooth muscles are involuntary and line internal organs. 2. During skeletal muscle contraction, what directly causes the sarcomere to shorten according to the sliding filament theory? A) Actin filaments actively pulling myosin toward the Z-line B) Myosin heads binding to actin and pulling actin filaments inward toward the sarcomere center C) Calcium ions dissolving the Z-discs to allow filament sliding D) ATP causing myosin to detach and lengthen the filament Answer: B Explanation: Myosin cross-bridges bind to actin and undergo a power stroke, pulling actin filaments inward. This sliding action shortens the sarcomere without the filaments themselves changing length. 3. Which bone is part of the appendicular skeleton? A) Sternum B) Vertebra C) Scapula D) Rib Answer: C Explanation: The appendicular skeleton includes bones of the limbs and their girdles (pectoral and pelvic). The scapula is part of the pectoral girdle. The sternum, vertebrae, and ribs belong to the axial skeleton. 4. What key structural feature distinguishes synovial joints from fibrous or cartilaginous joints? A) They are immovable and connected by dense fibrous tissue B) They contain a fluid-filled synovial cavity that reduces friction C) They are joined entirely by hyaline cartilage allowing slight movement D) They fuse completely into a single bone after skeletal maturity Answer: B Explanation: Synovial joints have a synovial cavity filled with lubricating fluid, enclosed by a joint capsule. This allows free movement (e.g., knee, shoulder), unlike immovable fibrous or slightly movable cartilaginous joints. 5. What is a fundamental difference between human spermatogenesis and oogenesis? A) Spermatogenesis yields four functional gametes per meiotic division; oogenesis yields one functional ovum and polar bodies B) Oogenesis begins at puberty; spermatogenesis begins before birth C) Spermatogenesis involves only mitosis; oogenesis involves meiosis D) Oogenesis occurs continuously throughout life; spermatogenesis stops at menopause Answer: A Explanation: In spermatogenesis, one diploid spermatogonium produces four equal-sized, functional sperm cells. In oogenesis, unequal cytoplasmic division produces one large functional ovum and smaller polar bodies that degenerate. 6. The mid-cycle luteinizing hormone (LH) surge that triggers ovulation is primarily driven by: A) Negative feedback from progesterone B) Positive feedback from rising estrogen levels C) Inhibition of GnRH by inhibin D) Direct stimulation by follicle-stimulating hormone (FSH) Answer: B Explanation: High, sustained estrogen levels from the mature follicle stimulate the pituitary to release more LH (positive feedback), creating the surge that causes ovulation. After ovulation, progesterone exerts negative feedback. 7. How do combined oral contraceptive pills primarily prevent pregnancy? A) By creating a physical barrier blocking sperm entry into the uterus B) By suppressing ovulation through inhibition of FSH and LH release C) By producing an acidic vaginal environment that kills sperm D) By preventing implantation of a fertilized egg as their sole mechanism Answer: B Explanation: Estrogen and progestin in combined pills suppress hypothalamic GnRH and pituitary FSH/LH secretion, preventing follicular development and the LH surge, thereby inhibiting ovulation. Secondary effects include thickened cervical mucus.

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