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प्रश्न
Write true or false
Decomposition of leaves is a fast change.
विकल्प
True
False
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उत्तर
False.
Decomposition of leaves is a slow change.
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संबंधित प्रश्न
Classify the changes involved in the following process as physical or chemical changes:
Photosynthesis
What are reversible and irreversible changes ? Give one example for each.
True or false
Is the process of digestion a physical change?
Read the paragraph and note down the various types of changes it mentions.
It was nearing six o'clock in the evening. The sun was setting. A breeze was blowing. Leaves on the tree were shaking. Sahil was sitting in the courtyard, rolling balls of wet soil, and shaping them into various toys. Then he felt hungry and went into the house. Mother made a dough from wheat flour and fried purees. While eating hot purees, his attention was drawn outside the window. It had started raining. There was lightning, too. Sahil was enjoying his dinner in the dim light.
Is a change of state of matter – a physical or a chemical change. Give reasons.
Give a reason why – Heating a platinum wire is a reversible change but, heating a magnesium wire is an irreversible change.
When ice melts to form water, change occurs in its
Digestion of food is a physical change.
Ice, water and water vapour look different and display different ______ properties but they are ______ the same.
Cutting a log of wood into pieces is a chemical change.
