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🔥ልዩ የልጆች መዝናኛ ፕሮግራም ቅዳሜ ሐምሌ 6/11/2016 በጀነራል ዊንጌት ፖሊ ቴክኒክ ኮሌጅ ግቢ ዉስጥ :: 🔥ቅዳሜ እለት ከ 4:00 እስከ 10:00 ጀነራል ዊንጌት ግቢ በሕፃናት ይደምቃል:: 🔥ቅዳሜ እለት ሐምሌ 6 /2016 ዓ.ም ማንም ሕፃን አይቀርም :: •የኢቶጵስ ጣፋጭ ተረቶች •ጭውውቶች •ውዝዋዜ •ሰርከስ •ልዩ ልዩ ውድድሮች •ሽልማቶች....... https://www.youtube.com/watch?v=iwZV_kwSRU8

🔥ልዩ የልጆች መዝናኛ ፕሮግራም ቅዳሜ ሐምሌ 6/11/2016 በጀነራል ዊንጌት ፖሊ ቴክኒክ ኮሌጅ ግቢ ዉስጥ :: 🔥ቅዳሜ እለት ከ 4:00 እስከ 10:00 ጀነራል ዊንጌት ግቢ በሕፃናት ይደምቃል:: 🔥ቅዳሜ እለት ሐምሌ 6 /2016 ዓ.ም ማንም ሕፃን አይቀርም :: •የኢቶጵስ ጣፋጭ ተረቶች •ጭውውቶች •ውዝዋዜ •ሰርከስ •ልዩ ልዩ ውድድሮች •ሽልማቶች....... https://www.youtube.com/watch?v=iwZV_kwSRU8

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📚Chemistry common questions about Periodic Table Trends **Instructions:** Choose the single best answer for each question. 1. Which of the following properties generally INCREASES from left to right across a period in the periodic table? a) Atomic radius b) Ionization energy c) Metallic character d) Number of electron shells Answer: b) Ionization energy 2. Which element has the highest electronegativity? a) Fluorine (F) b) Chlorine (Cl) c) Francium (Fr) d) Oxygen (O) Answer: a) Fluorine (F) 3. As you move down a group in the periodic table, atomic radius generally: a) Increases b) Decreases c) Remains constant d) Shows no consistent trend Answer: a) Increases 4. Which of these elements would be expected to have the largest ionic radius? a) Li⁺ b) Na⁺ c) K⁺ d) Rb⁺ Answer: d) Rb⁺ 5. Which of the following elements has the lowest first ionization energy? a) Helium (He) b) Sodium (Na) c) Neon (Ne) d) Argon (Ar) Answer: b) Sodium (Na) 6. Electron affinity is best defined as the: a) Energy required to remove an electron from an atom. b) Tendency of an atom to attract electrons towards itself in a chemical bond. c) Energy released or absorbed when an electron is added to a neutral atom. d) Energy difference between the highest occupied and lowest unoccupied energy levels. Answer: c) Energy released or absorbed when an electron is added to a neutral atom. 7. Which of these elements exhibits the most metallic character? a) Carbon (C) b) Silicon (Si) c) Germanium (Ge) d) Tin (Sn) Answer: d) Tin (Sn) 8. Which of the following is a TRUE statement about electronegativity? a) It is the same as electron affinity. b) It only applies to ionic bonds. c) It is a measure of an atom's ability to attract shared electrons in a covalent bond. d) It increases down a group in the periodic table. Answer: c) It is a measure of an atom's ability to attract shared electrons in a covalent bond. 9. Elements in the same group (vertical column) of the periodic table share similar chemical properties. This is primarily because they have the same: a) Number of protons b) Atomic mass c) Number of valence electrons d) Number of neutrons Answer: c) Number of valence electrons 10. Which of the following correctly explains the general trend of ionization energy in the periodic table? a) Increases across a period due to increasing nuclear charge. b) Decreases down a group due to increasing shielding effect. c) Both a and b d) Neither a nor b Answer: c) Both a and b 11. Elements with high electronegativity tend to form: a) Positive ions (cations) b) Negative ions (anions) c) Metallic bonds d) No ions at all Answer: b) Negative ions (anions) 12. Which of the following statements about atomic radius is FALSE? a) Cations are smaller than their parent atoms. b) Anions are larger than their parent atoms. c) Atomic radius increases as you move to the right across a period. d) Atomic radius is influenced by the number of electron shells. Answer: c) Atomic radius increases as you move to the right across a period. 13. Which periodic trend is responsible for the increasing reactivity of alkali metals (Group 1) as you move down the group? a) Decreasing ionization energy b) Increasing electronegativity c) Increasing electron affinity d) Decreasing atomic radius Answer: a) Decreasing ionization energy

✍️Biology MCQs on Biology, its branches, and subfields: 1. Which of the following is not a branch of biology? a) Zoology b) Botany c) Physics d) Microbiology 2. The study of the Earth's living organisms and their interactions with the environment is known as: a) Ecology b) Genetics c) Immunology d) Physiology 3. Which branch of biology focuses on the study of cells? a) Microbiology b) Botany c) Entomology d) Mycology 4. The study of the structure and function of genes is known as: a) Genetics b) Paleontology c) Embryology d) Virology 5. Which of the following is a subfield of biology that involves the study of insects? a) Entomology b) Ornithology c) Herpetology d) Ichthyology 6. The branch of biology that deals with the study of plant life is called: a) Botany b) Zoology c) Mycology d) Paleontology 7. The study of the classification, evolution, and distribution of organisms is known as: a) Taxonomy b) Biotechnology c) Biochemistry d) Pharmacology 8. Which branch of biology focuses on the study of the immune system? a) Immunology b) Biochemistry c) Endocrinology d) Epidemiology 9. The study of the structure and function of the nervous system is known as: a) Neurology b) Embryology c) Histology d) Physiology 10. Which branch of biology deals with the study of fish? a) Ichthyology b) Herpetology c) Virology d) Anthropology 11. The branch of biology that involves the study of the development of embryos is called: a) Embryology b) Microbiology c) Pathology d) Anatomy 12. The study of the interaction between genes and the environment is known as: a) Epigenetics b) Paleontology c) Biophysics d) Biogeography 13. Which branch of biology focuses on the study of the human body and its functions? a) Anatomy b) Botany c) Genetics d) Virology 14. The study of the structure, function, and evolution of proteins is known as: a) Proteomics b) Paleontology c) Biochemistry d) Biotechnology 15. Which branch of biology deals with the study of birds? a) Ornithology b) Entomology c) Herpetology d) Mycology 16. The study of the interactions between organisms and their environment is known as: a) Ecology b) Evolutionary biology c) Microbiology d) Paleontology 17. Which branch of biology focuses on the study of viruses? a) Virology b) Immunology c) Biochemistry d) Pharmacology 18. The study of the structure and function of tissues is known as: a) Histology b) Physiology c) Entomology d) Pathology 19. Which branch of biology deals with the study of reptiles and amphibians? a) Herpetology b) Ichthyology c) Ornithology d) Mammalogy 20. The branch of biology that involves the study of the origin and history of life on Earth is called: a) Paleontology b) Biotechnology c) Microbiology d) Epidemiology Answers: 1. c) Physics 2. a) Ecology 3. a) Microbiology 4. a) Genetics 5. a) Entomology 6. a) Botany 7. a) Taxonomy 8. a) Immunology 9. a) Neurology 10. a) Ichthyology 11. a) Embryology 12. a) Epigenetics 13. a) Anatomy 14. c) Biochemistry 15. a) Ornithology 16. a) Ecology 17. a) Virology 18. a) Histology 19. a) Herpetology 20. a) Paleontology

Physics QUIZ Instructions:** Choose the best answer for each question. Show your calculations as needed. Constants: ✅ Specific heat of water (c_water) = 4.18 J/(g°C) = 1 cal/(g°C) ✅Specific heat of ice (c_ice) = 2.09 J/(g°C) ✅ Latent heat of fusion for water (L_f) = 334 J/g ✅ Latent heat of vaporization for water (L_v) = 2260 J/g ✅ Ideal gas constant (R) = 8.31 J/(mol K) 1. A metal rod of length 2 m expands by 0.004 m when heated from 20°C to 80°C. What is the coefficient of linear expansion of the metal?** a) 2 × 10⁻⁵ °C⁻¹ b) 4 × 10⁻⁵ °C⁻¹ c) 1 × 10⁻⁵ °C⁻¹ d) 8 × 10⁻⁵ °C⁻¹ 2. How much heat is required to completely vaporize 50 g of water initially at 25°C?** a) 113 kJ b) 21.1 kJ c) 134.1 kJ d) 11.3 kJ 3,A 100 g piece of aluminum (c = 0.9 J/(g°C)) at 80°C is dropped into 200 g of water at 20°C. Assuming no heat loss to the surroundings, what is the final equilibrium temperature?** a) 28.3 °C b) 50 °C c) 32.6 °C d) 23.5 °C 4,Two metal rods of the same length and cross-sectional area, but made of different materials, are connected end to end. The thermal conductivity of the first rod is twice that of the second rod. If the free ends of the rods are maintained at temperatures of 100°C and 0°C, what is the temperature at their junction?** a) 33.3 °C b) 50 °C c) 66.7 °C d) 75 °C 5,A container has a mixture of 100 g of ice at 0°C and 50 g of water at 40°C. What is the final state and temperature of the mixture after it reaches thermal equilibrium?** a) All ice at 0°C b) Ice-water mixture at 0°C c) All water at a temperature above 0°C d) All water at a temperature below 0°C 6. A 5 kg block of ice at -10°C is heated until it becomes steam at 110°C. How much heat energy is required for this transformation?** a) 14.7 kJ b) 14.7 MJ c) 1.47 MJ d) 147 kJ 7,A steel bridge is 500 m long at a temperature of 20°C. What is the change in length of the bridge when the temperature rises to 35°C? (The coefficient of linear expansion for steel is 1.2 × 10⁻⁵ °C⁻¹)** a) 0.9 m b) 0.09 m c) 9 m d) 0.009 m Comment your Answers 👇🏿👇🏿

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