CIDESCO EXAM PREP QUESTIONS AND ANSWERS

I Biological and non-biological substances both need oxygen for their existence. II The human body consists only of biological substances. - Answer-I is correct and II is incorrect Characteristics of life include: - Answer-growth and metabolism Examples of synthetic substances are: - Answer-plastics and silicones Examples of organic biological substances are: - Answer-carbohydrates and fats Examples of mineral substances are: - Answer-paraffins and petroleum Matter is everything that: - Answer-occupies space and has weight The three forms of matter are solids, liquids and: - Answer-gases What property does all matter have? - Answer-All matter has weight Condensation is the change of matter from: - Answer-a gas to a liquid Vapourisation is the change of matter from: - Answer-liquid to a gas Melting is the change of matter from: - Answer-a solid to a liquid Sublimation is the change of matter from: - Answer-a solid to a gas Condensation is: - Answer-the change of a vapour to a liquid The alteration of the properties of matter without the formation of any new substance is called a/an: - Answer-physical change The immediate change of a solid into a vapour is called: - Answer-sublimation An example of a single-celled cellular organism is: - Answer-a bacterium I. A micro-organism is the smallest part of the human body. II All micro-organisms need nutrients for their existence. - Answer-I is incorrect and II is correct Examples of bacteria are: - Answer-bacilli and cocci I. Every living organism needs some non-biological substances for it's existence. II. All