Matter and Energy
Air, water, sources of energy and their uses.
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Take a full mock →Q1 · Matter and Energy · EASY
A student observes that a wet cloth hung outside on a sunny day dries faster than on a cloudy day. Which property of air is primarily responsible for this observation?
Q2 · Matter and Energy · MEDIUM
Ramesh wants to conserve energy in his daily life. Which of the following practices would be MOST effective in reducing the use of non-renewable energy sources?
Q3 · Matter and Energy · HARD
A teacher demonstrates an experiment where she takes two identical plants. Plant A is kept under a glass jar with a small bowl of water inside, and Plant B is kept under a glass jar without water. After a few days, she observes that Plant A shows condensation (water droplets) on the inner surface of the jar, but Plant B does not. Which conclusion about the water cycle can students BEST draw from this experiment?
Q4 · Matter and Energy · MEDIUM
When we rub our palms together vigorously, they become warm. This demonstrates the conversion of which form of energy into heat energy?