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I 1. Cows have flat teeth because they need not to tear something as they eat grassess or plants whereas lions are carnivores hence they have to live upon the other animals i.e. they have to kill animals.
2. The property of sugar which makes it different from sand is that sugar can dissolve in water.
3. Coir or coconut fibre, is a natural fibre extracted from the outer husk of coconut and used in products such as floor mats, doormats, brushes and mattresses. ... White coir, harvested from unripe coconuts, is used for making finer brushes, string, rope and fishing nets.
4. The 13 essential vitamins your body needs are vitamins A, C, D, E, K and the B vitamins: thiamine (B1), riboflavin (B2), niacin (B3), pantothenic acid (B5), pyroxidine (B6), biotin (B7), folate (B9) and cobalamin (B12). The four fat-soluble vitamins—A, D, E, and K—are stored in the body's fatty tissues.
5. Separating remaining loose chaff from the grain is called winnowing – traditionally done by repeatedly tossing the grain up into a light wind which gradually blows the lighter chaff away. ... Domesticated grains such as durum wheat and common wheat have been bred to have chaff that is easily removed.
II 1. Unsaturated fats, which are liquid at room temperature, are different from saturated fats because they contain one or more double bonds and fewer hydrogen atoms on their carbon chains. Unsaturated fats come from plants and occur in the following kinds of foods: Olives.
2. A solid has definite volume and shape, a liquid has a definite volume but no definite shape, and a gas has neither a definite volume nor shape. The change from solid to liquid usually does not significantly change the volume of a substance.
3. The most common difference between the two is that while conductors allow free flow of electrons from one atom to another, insulators restrict free flow of electrons. Conductors allow electrical energy to pass through them, whereas insulators do not allow electrical energy to pass through them.
4. The major difference between these three groups is that carnivores eat meat, herbivores eat plants, and omnivores eat a little of both. ... The major difference between these three groups is that carnivores eat meat, herbivores eat plants, and omnivores eat a little of both.
5. Sedimentation occurs when the suspended particles are large enough to settle to the bottom of a vessel under their own weight. ... Filtration works on the difference in particle sizes between the small liquid or gas molecules and larger solid particles.
III 1. The handles of cooking utensils are made up of plastic or wood because plastics and wood are bad conductor of heat. As they are bad conductors of heat therefore they won't be able to pass the heat of the flame to the person's hand and will prevent the person from burns or any other injuries.
2. It is un healthy because overcooking kills all the germs.
3. Thermometers are made of glass as glass has a very low coefficient of thermal expansion. ... If it was some other material than glass, it would expand unevenly and the capillary which hold the mercury will also undergo irregular fluctuations and lead to a faulty measurement.
4. Because flowers helps them to grow.
5. The reason that children need relatively more protein than adults is because of the protein requirement for growth. In order to maintain their tissues and organs, adults need to replace the protein that they inevitably breakdown or lose each day.
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