1. What is the molar mass of water (H₂O)?
  a) 16 g/mol
  b) 17 g/mol
  c) 18 g/mol
  d) 19 g/mol

2. Which of the following is an example of a chemical change?
  a) Melting ice
  b) Boiling water
  c) Rusting of iron
  d) Dissolving sugar in water

3. What is the electron configuration of oxygen (O)?
  a) 1s² 2s² 2p²
  b) 1s² 2s² 2p³
  c) 1s² 2s² 2p⁴
  d) 1s² 2s² 2p⁵

4. Which of the following is a strong acid?
  a) Acetic acid (CH₃COOH)
  b) Hydrofluoric acid (HF)
  c) Hydrochloric acid (HCl)
  d) Carbonic acid (H₂CO₃)

5. What type of bond is formed when atoms share electrons?
  a) Ionic bond
  b) Covalent bond
  c) Metallic bond
  d) Hydrogen bond

1. c) 18 g/mol (H₂O: 2(1 g/mol for H) + 16 g/mol for O = 18 g/mol)
2. c) Rusting of iron (Rusting involves the formation of a new substance, iron oxide)
3. c) 1s² 2s² 2p⁴ (Oxygen has 8 electrons: 2 in the 1s orbital, 2 in the 2s orbital, and 4 in the 2p orbital)
4. c) Hydrochloric acid (HCl) (HCl completely dissociates in water)
5. b) Covalent bond (Covalent bonds are formed by sharing electrons, while ionic bonds are formed by the transfer of electrons)

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1. I left my keys __ the table.
  a) on
  b) in
  c) at
  d) under

2. She's been living in London __ five years.
  a) for
  b) since
  c) during
  d) ago

3. The cat jumped __ the sofa.
  a) on
  b) over
  c) at
  d) with

4. We're going to the cinema __ Friday.
  a) on
  b) in
  c) at
  d) with

5. The book is __ him.
  a) to
  b) by
  c) from
  d) with

6. I am staying _ home today.
  a) at
  b) on
  c) in
  d) with

7. The aeroplane flew _ our house.
  a) over
  b) at
  c) above
  d) with

Answer Key:
1. a) on
2. a) for
3. b) over
4. a) on
5. b) by
6. a) at
7. a) over

5⃣ The correct answer is b) by.

The sentence "The book is by him" indicates that he is the author of the book.

1. Which of the following is NOT a property of acids?
  (a) Sour taste
  (b) Turns blue litmus paper red
  (c) Reacts with metals to produce hydrogen gas
  (d) Feels slippery to the touch

2. What is the chemical formula for water?
  (a) HO
  (b) H2O
  (c) OH2
  (d) H3O

3. Which subatomic particle has a positive charge?
  (a) Electron
  (b) Neutron
  (c) Proton
  (d) Positron

4. What is the process by which a solid changes directly into a gas?
  (a) Melting
  (b) Boiling
  (c) Sublimation
  (d) Condensation

5. Which of the following elements is a noble gas?
  (a) Oxygen
  (b) Nitrogen
  (c) Chlorine
  (d) Helium

6. What type of chemical bond is formed when electrons are shared between two atoms?
  (a) Ionic bond
  (b) Covalent bond
  (c) Metallic bond
  (d) Hydrogen bond

7. Which of the following is an example of a chemical change?
  (a) Melting ice
  (b) Dissolving sugar in water
  (c) Burning wood
  (d) Boiling water

8. What is the pH of a neutral solution?
  (a) 0
  (b) 7
  (c) 14
  (d) 1

9. What is the name for the energy required to start a chemical reaction?
  (a) Kinetic energy
  (b) Potential energy
  (c) Activation energy
  (d) Thermal energy

10. Which of the following is a balanced chemical equation for the reaction of hydrogen gas with oxygen gas to form water?
  (a) H2 + O2 -> H2O
  (b) H + O -> H2O
  (c) 2H2 + O2 -> 2H2O
  (d) H2 + 2O2 -> 2H2O

Answer Key:

1. (d)
2. (b)
3. (c)
4. (c)
5. (d)
6. (b)
7. (c)
8. (b)
9. (c)
10. (c)

የካምብሪጅ ዩኒቨርሲቲ እና የካሊፎርኒያ ዩኒቨርሲቲ ሳይንቲስቶች ከአየር ላይ Carbon dioxide (CO2) በመምጠጥ ወደ ነዳጅ መቀየር የሚችል ቅጠል ሰሩ።

ይህ ተፈጥሮን መሰረት ያደረገ ግኝት በጣም ጥቃቅን የመዳብ አበባዎችን በመጠቀም ወደ multi-carbon products ይቀይራል። ከዚህ በተጨማሪ ከፍተኛ ጠቀሜታ ወዳላቸው ግላይስሬት፣ ላክቴት እና ፎርሜት ወደ መሳሰሉ ተረፈ ምርቶች ይቀይራል።

ይህ ምርምር ከትልልቅ ኢንዱስትሪዎች የሚመጣውን የካርቦን ልቀት በመቀነስ የአለማችንን አየር ንብረት እንደሚያስተካክል ታምኖበታል።

ዝርዝር መረጃ ከፈለጋችሁ Click me

c) 30 (The difference between consecutive numbers increases by 2 each time: +4, +6, +8, +10)

በ2017 የትምህርት ዘመን ከ50ሺ በላይ ተማሪዎች የ12ኛ ክፍል መልቀቂያ ፈተናን ለመውሰድ ተመዝግበዋል

በአዲስ አበባ በማህበራዊና በተፈጥሮ ሳይንስ የትምህርት መስኮች የ2017 ዓመት 50ሺ 807 ተማሪዎች የ12ኛ ክፍል ፈተና እንደሚወስዱ የአዲስ አበባ ከተማ አስተዳደር ትምህርት ቢሮ አስታውቋል።

በ2017 የትምህርት ዘመን  የ12ኛ ክፍል መልቀቂያ ፈተናን በከተማ አስተዳደሩ በበይነ መረብ ኦን ላይን በውጤታማነት ለመስጠት በሚያስችል ስራ እየተሰራም መሆኑን የቢሮው ምክትል ቢሮ ኃላፊ አቶ ሳምሶን መለሰ ለብስራት ሬድዮ እና ቴሌቪዥን ተናግረዋል።

የ2017 የትምህርት ዘመን የ12ኛ ክፍል መልቀቂያ ፈተና በከተማ አስተዳደሩ በበይነ መረብ በውጤታማነት ለመስጠት እንዲቻል ከወዲሁ የተለያዩ የቅድመ ዝግጅት ተግባራት ለማከናወን እቅድ መዘጋጀቱንና ወደ ስራ መገባቱን አንስተዋል። ፈተናው ኦን ላይን እንደመሰጠቱ ኮምፒውተሮችና እና መሟላት የሚገባቸውን መሰል ግብዓቶች የመለየት ስራ ተጀምሯል።

ለፈተናው አስፈላጊ የሆኑ ግብአቶችን የማዘጋጀት ተግባራት ከወዲሁ በመጀመር ፈተናው በታቀደለት መርሃ ግብር እንዲሰጥ በትኩረት መስራት ይገባል ተብሏል።

የ2017 ዓ.ም የ12ኛ ክፍል ሀገር አቀፍ ፈተና ሁሉም ተማሪዎች በተማሩበት ሥርዓተ ትምህርት ይዘት ይዘጋጃል፡፡

የ2017 ዓ.ም ተፈታኝ ተማሪዎች ከ9ኛ - 10ኛ በነባሩ ሥርዓተ ትምህርት፣ ከ11ኛ - 12ኛ ደግሞ በአዲሱ ሥርዓተ ትምህርት የተማሩ ናቸው። ነገር ግን በ2015 ዓ.ም በመላ ሀገሪቱ በናሙናነት በተመረጡ ት/ቤቶች የስርዓተ ትምህርት የሙከራ ትግበራ ላይ የተሳተፉ ት/ቤቶች ላይ የነበሩ ተማሪዎች 10ኛ ከፍልን በአዲሱ ሥርዓተ ትምህርት የተማሩ ናቸው፡፡  በአማራ ክልል በ2016 የትምህርት ዘመን መፈተን ሲገባቸው በጸጥታ ችግር ምክንያት ሳይፈተኑ የቀሩና የ11ኛ ክፍልን በነባሩ ሥርዓተ ትምህርት የተማሩ ት/ቤቶች ላይ የነበሩ ተማሪዎች በ2017 ዓ.ም  የሚፈተኑ አሉ፡፡ በመሆኑም የ2017 ዓ.ም የሁለተኛ ደረጃ መልቀቂያ ፈተና ከላይ የተገለጹትን ሶስቱንም ነባራዊ ሁኔታዎች ከግምት ውስጥ ባስገባ እና ሁሉንም የዘመኑን ተፈታኝ ተማሪዎች በማከለ መንገድ ስታንዳርዱን፣ ደህንነቱንና ሚስጢራዊነቱን ጠብቆ በመዘጋጀት ላይ ይገኛል።

ስለሆነም የፈተና ዝግጅቱ፡-
    1) ከ9ኛ ከፍል ሙሉ በሙሉ ከነባሩ ሥርዓተ ትምህርት፣
    2) ከ10ኛ ክፍል በነባሩና በአዲሱ ሥርዓተ ትምህርት ላይ ተመሳሳይ ይዘቶች፣
    3) ከ11ኛ ከፍል በነባሩና በአዲሱ ሥርዓተ ትምህርት ላይ ተመሳሳይ ይዘቶች፣
    4) ከ12ኛ ከፍል ሙሉ በሙሉ ከአዲሱ ሥርዓተ ትምህርት መሰረት የሚዘጋጅ ይሆናል።

ከላይ የተዘረዘረው የዝግጅት ሂደት በሁሉም የትምህርት ዓይነቶች ላይ እንደተጠበቀ ሆኖ የኢኮኖሚክስ የትምህርት ዓይነት ግን በስርዓተ ትምህርቱ አዲስ የተጀመረ ከመሆኑ ጋር ተያይዞ በ12ኛ ክፍል ይዘት ላይ ብቻ ተመስርቶ የሚዘጋጅ ይሆናል።

በአጠቃላይ ሁሉም ተማሪዎች ከ9ኛ -12ኛ ክፍል በየተማሩበት የሥርዓተ ትምህርት ይዘት ላይ መመስረት ፈተናው እንደሚዘጋጅ አውቀው ተገቢውን ዝግጅት እንዲያደርጉ መልዕክታችንን እናስተላልፋለን።

ስለሆነም ተማሪዎች አስፈላጊውን ዝግጅት እንዲያደርጉ ወላጆች፣ መምህራንና መላው የትምህርት ማህበረሰብ ተገቢውን ድጋፍ እንዲያደርጉ ጥሪያችንን እናስተላልፋለን።
                         
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Which sentence is grammatically correct?
  a) Me and him went to the store.
  b) He and I went to the store.
  c) Him and me went to the store.
  d) I and him went to the store.

2. Choose the correct pronoun: The dog wagged __ tail.
  a) it's
  b) its
  c) it
  d) its'

3. Identify the sentence with the correct subject-verb agreement:
  a) The team are playing well today.
  b) The team is playing well today.
  c) The team has playing well today.
  d) The team have playing well today.

4. Which sentence uses the correct tense?
  a) I have been seeing that movie yesterday.
  b) I saw that movie yesterday.
  c) I have saw that movie yesterday.
  d) I had seen that movie yesterday.

5. Select the sentence with the correct use of commas:
  a) My favorite colors are blue green and purple.
  b) My favorite colors are blue, green and purple.
  c) My favorite colors are blue green, and purple.
  d) My favorite colors are blue, green, and purple.

we need admin who can post constantly @elevadmin Dm

▌Top Ten Chemistry Questions

1. What is the atomic number of an element?
  - a) The number of protons in the nucleus of an atom.
  - b) The number of neutrons in the nucleus of an atom.
  - c) The total number of electrons in an atom.
  - d) The total number of protons and neutrons in an atom.

2. What is the pH of a neutral solution at 25°C?
  - a) 0
  - b) 7
  - c) 14
  - d) 10

3. Which of the following is a strong acid?
  - a) Acetic acid (CH₃COOH)
  - b) Hydrochloric acid (HCl)
  - c) Carbonic acid (H₂CO₃)
  - d) Citric acid (C₆H₈O₇)

4. What is the molar mass of water (H₂O)?
  - a) 16 g/mol
  - b) 18 g/mol
  - c) 20 g/mol
  - d) 22 g/mol

5. Which gas law states that the volume of a gas is directly proportional to its temperature (in Kelvin) at constant pressure?
  - a) Boyle's Law
  - b) Charles's Law
  - c) Avogadro's Law
  - d) Ideal Gas Law

6. What is the primary type of bond formed between two nonmetals?
  - a) Ionic bond
  - b) Covalent bond
  - c) Metallic bond
  - d) Hydrogen bond

7. What is the process called when a solid changes directly into a gas without passing through the liquid phase?
  - a) Melting
  - b) Freezing
  - c) Sublimation
  - d) Condensation

8. Which of the following elements is a noble gas?
  - a) Oxygen (O)
  - b) Nitrogen (N)
  - c) Argon (Ar)
  - d) Carbon (C)

9. What is the chemical formula for table salt?
  - a) NaCl
  - b) KCl
  - c) CaCl₂
  - d) MgCl₂

10. In a chemical reaction, what is the term for the substances that are present before the reaction occurs?
  - a) Products
  - b) Reactants
  - c) Catalysts
  - d) Solvents

▌Answers

1. a) The number of protons in the nucleus of an atom.
2. b) 7
3. b) Hydrochloric acid (HCl)
4. b) 18 g/mol
5. b) Charles's Law
6. b) Covalent bond
7. c) Sublimation
8. c) Argon (Ar)
9. a) NaCl
10. b) Reactants

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