Results for “solar energy”
- 📝 PracticeCh 13: Earth as a System: Energy, Matter, and LifeClass 9 · Science · 56 practice questions with answers
…X-rays from space dangerous, and why don’t they harm us much? · The solar constant is about 1.4 kW/m², but about 1 kW/m² reaches the ground on a clear day. What fraction reaches the surface…
- 📝 PracticeCh 5: Minerals and Energy ResourcesClass 10 · Social Science · 44 practice questions with answers
…located near coalfields? · Which are non-conventional sources of energy? (Tick all that apply) · Why is there a pressing need to use non-conventional energy sources in India? · What are the…
- 📝 PracticeCh 7: Energy — How Things WorkClass 5 · Environmental Studies · 30 practice questions with answers
According to the chapter, what is energy? · In the balloon activity, what makes the balloon move forward? · How does a rubber band guitar make sound? · Two cups of water are kept for 20…
- 📝 PracticeCh 13: Our EnvironmentClass 10 · Science · 47 practice questions with answers
…(human-made) ecosystems? (Tick all that apply) · Why is the flow of energy in an ecosystem unidirectional? · Why are food chains usually limited to three or four trophic levels? · Green…
- 📝 PracticeCh 1: Natural Resources and Their UseClass 8 · Social Science · 50 practice questions with answers
…Sikkim becoming fully organic? (Tick all that apply) · Why does the solar alliance focus on sunshine-rich countries? · Planting the kinds of trees that originally grew in an area helps…
- 📝 PracticeCh 5: Food for HealthClass 4 · Environmental Studies · 30 practice questions with answers
…needs. · According to the chapter, which of these foods are rich in energy? Select all that apply. · Butter, ghee and oil also provide energy to our body. · Which of these are body-building…
- 📝 PracticeCh 10: Light: Mirrors and LensesClass 8 · Science · 47 practice questions with answers
…angle of reflection. · How could a concave mirror help in harnessing solar energy? · Compare a convex lens and a concave lens in two ways.