Q. Answer the following in one word: 1. Liquid that mix well with one another. 2. The shine exhibited by a material, especially a metal. 3. Name 2 gases used by aquatic plants and animals that are soluble in water. 4. Property of objects attracted by magnets. Q, Answer in brief : 5. Mixtures of red chilly powder in water, butter in water, petrol in water and honey in water are given to Radha, Sudha, Sofia and Suraj respectively. Whose mixture is in solution form? 6. Take a small cotton ball and place it in a tumbler/bowl filled with water. Observe it for at least 10 minutes. Will it float or sink in water and why? 7. How are the gases dissolved in water, important for living organisms?
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1. miscible
2. lustre
3. oxygen, carbon dioxide
4. magnetism
5. Suraj's (as only honey dissolves in water)
6. First, it will float when it is lighter. After some time, it will sink because it has absorbed water and thus become heavy.
7. Oxygen is used by aquatic organisms for respiration. And carbon dioxide is used by aquatic plants for photosynthesis.
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