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Science

Energy flow in Earth systems

As part of Class 9 Science, this topic explores how energy enters Earth’s system mainly as sunlight and moves through the atmosphere, land, oceans, and living organisms. Students connect the absorption and reflection of radiation with heating, temperature differences, convection, winds, and the water cycle. They also examine how energy passes through food chains and ecosystems while matter cycles through Earth’s spheres, building a systems view of how energy flow links climate, weather, and life.

Easy · Level 1 · 2 questions

TOPIC PRACTICE

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2 questions

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  1. They use less electricity for the same task
  2. They use more electricity for the same task
  3. They increase energy wastage
  4. They always increase electricity bills
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  1. It reduces the electricity needed for artificial lighting
  2. It increases electricity consumption for artificial lighting
  3. It makes the room darker during the day
  4. Natural light reduces the energy efficiency of appliances

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