What Is The Difference Between 2H And H2

Chreey Chreey

• 28.11.2017
• Science
• Secondary School

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New questions in Science

1. A family dries wet clothes using two different methods: Clothes are hung on a line in direct sunlight outdoors. Clothes are hung on a line indoors … under a running fan. Compare the two methods and identify which setup results in faster drying. Give a scientific reason for your answer by referring to factors that affect evaporation.2. Two students are asked to make muddy river water fit for household use. Student A filters the muddy water directly.Student B allows the water to stand undisturbed for some time and then filters it.As a science student, evaluate both approaches and decide which method is more effective. Justify your answer using scientific reasoning.3. After the rainy season, many frogs are seen in the school garden. However, during winter, only a few frogs are visible.Using your understanding of the frog's life cycle and seasonal changes, explain why the number of frogs seen changing across seasons.4. A classroom has two thermometers: One is placed near a window.The other is placed at the centre of the room.The thermometer near the window shows a lower temperature. Analyze the situation and decide which thermometer gives a more reliable reading of room temperature. Support your answer with reasons.5. After a hot shower, a student notices that the bathroom mirror becomes cloudy and then clears after some time.a) Identify the physical process responsible for the cloudiness on the mirror.b) Explain why the mirror becomes elear again without wiping it.c) Predict whether this effect would be stronger on a highly humid day and justify your prediction.6. A local spice shop receives powdered masala mixed with wooden chips, fine dust, and iron particles. Design a simple step-by-step processing flow chart using appropriate separation methods to remove each impurity. Explain why each method is suitable.7. A student grows bean plants in two types of soil:Soft, loose soilHard clay soilThe plants in loose soil grow faster.Evaluate this observation and explain how soil properties influence plant growth.8. A city is facing increased air pollution due to human activities such as transport and waste burning.Propose any three practical actions that citizens can take to reduce air pollution. Explain how each action helps improve air quality.9. Two heavenly bodies are described below:Body A: Has craters, no air, and reflects sunlightBody B: Is very hot, gives out its own light, and is at the centre of the sola systemIdentify Body A and Body B. Then analyze one key difference in the role each plays in the solar system.​ what is periscope? and in therir periscoper how many mirrors? Importance of change of state of matter in our daily lives Importance of change of state of matter in our daily lives What is dark matter made of?​ Previous Next