Q-8 Answer in long questions.
1. Classify the changes involved in the following process as physical or chemical changes.
(a) Photosynthesis (b) Dissolving salt in water (c) Burning of coal (d) Melting of wax
(e) Digestion of food
(f) Dissolve sugar in water
2. Explain sea breeze or land breeze.
1
3. List the differences between clayey soil and sandy soil.
4. Differentiate between physical changes and chemical changes.
5. Distinguish between acid and bases with examples.
6. Describe the stages involved the life cycle of a silkworm with a neat and labeled diagram.
Answers
Answer:
Processes Types of Changes
Photosynthesis Chemical Changes
Dissolving sugar in water Physical Changes
Burning of coal Chemical Changes
Melting of wax Digestion of food Chemical Changes Physical Changes
Beating aluminium to make aluminium foil Physical Changes
Explanation:
Answer:
(a) Photosynthesis → Chemical change
(b) Dissolving sugar in water → Physical change
(c) Burning of coal → Chemical change
(d) Melting of wax → Physical change
(e) Beating aluminium to make aluminium foil → Physical change
(f) Digestion of food → Chemical change
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