Question

1.Rusting of an iron is an e.g. of a change. Decide, whether it is a physical or chemical

change. Give reasons also.
2.What are villi? Explain the functions of villi. 3

3. Discuss about the occupational hazard.​

Answer 1

chemical changes

Explanation:

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Answer 2

1. Rusting of iron: Chemical. Explanation: When iron rusts, 3 oxygen atoms combine with every 2 iron atoms. ... For example, atoms from sugar get rearranged into carbon dioxide and water. Mixing sand and water: Physical.
2. Background information: The structure of the small intestine is designed for absorption of nutrients. The inside of the small intestine is lined with villi that absorb nutrients from the liquid mixture called chyme produced in the stomach from the food we eat.
3. An occupational hazard is a hazard experienced in the workplace. Occupational hazards can encompass many types of hazards, including chemical hazards, biological hazards (biohazards), psychosocial hazards, and physical hazards.

Explanation:

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