Do any seven questions (7*2=14) (i) What is pasteurisation? Why is milk pasteurised? (ii) What dop you understand by conservation? Who does it? (iii) Differentiate between biodegradable and non-biodegradable substances. (iv) Can we use sulphur instead of copper in making of electrical cables? Why? (v) State two ways to conserve LGP in the kitchen. (vi) Calcute the pressure when a force of 200N is exerted on an area of- a. 10m2 b. 5m2 (vii) Why do we feel hot when we rub our hands? (viii) List two harms of noise pollution.
Answers
"Pasteurized Milk" Explained
First developed by Louis Pasteur in 1864, pasteurization kills harmful organisms responsible for such diseases as listeriosis, typhoid fever, tuberculosis, diphtheria, Q fever, and brucellosis.
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Answer:
1 2 4 5 7 8 answers below
Explanation:
1- The partial sterilization of a product such as milk or wine to make it safe for consumtion & improve bits keeping quality.
Milk is pasteurised to kill harmful organism responsible for disease like listeriosis typhoid fever tuberculosis diphtheria Q fever and brucellosis.
2. Conservation is the care protection of these resources so that they can persist for future generations.
4. No because current doesn't flow through sulphur.
5- Don't over cook
Use low heat
Use a thermos flask
7- When we rub our hands together the action of scraping the surface of your skin back & forth against each other causes the molecules in your skin to move a little faster. The faster the molecules move the higher the temperature.
8- Causing hearing problems
Higher stress level causing many lifestyle disease