1. What are the two types of fibers on a sheep's coat?
2. Why do the cut surfaces of fruits and vegetables turn brown?
3. State any two properties of Acids.
4. List two characteristic features of a clinical thermometer.
5. What is Soil? List five main things that makeup soil.
Answers
Answer: 1.Like us, the hairy skin of the sheep has two types of fibres that form its fleece: (i) the coarse beard hair, and (ii) the fine soft under-hair close to the skin. The fine hair provide the fibres for making wool.
2.When fresh fruits and vegetables are peeled or cut open, the enzyme called polyphenol oxidase (also called tyrosinase) contained in the cells is exposed to and reacts with the oxygen in the air. The reaction that occurs, which is called oxidation, is what turns the fruits and vegetables brown.
3. Aqueous solutions of acids are electrolytes, meaning that theyconduct an electrical current. ... Acids have a sour taste. ...
4.The two major features of a clinical thermometer are its calibration as well as its constriction. We know that the temperature of the human body varies from 95∘F to 110∘F. The thermometer is calibrated in such a way that it is capable of accommodating this range of temperature.
5.Soil is a mixture of organic matter, minerals, gases, liquids, and organisms that together support life.
Answer:
Like us, the hairy skin of the sheep has two types of fibres that form its fleece: (i) the coarse beard hair, and (ii) the fine soft under-hair close to the skin. The fine hair provide the fibres for making wool.