CCT term 1

                    CCT TEST ITEM 1 CLASS-7 Photosynthesis Green plants make their food in the presence of sunlight by process called photosynthesis. This is the start ofFood chainsof living things. Animals are unable to make their own food so they eat plants or other animals to get food they need. The animals they eat may have eaten plants, or other animals that ate plants. Ultimately all food comes from the food made by plants by the process of photosynthesis and all energy in food comes from sunlight. During photosynthesis, chlorophyll, the green pigment in plants, traps the energy from sunlight and uses it to join carbon dioxide and water to make glucose and oxygen. Carbon dioxide enters the plant from the air through small holes in the leaf called the stomata.Is’nt it interesting to know that the life supporting gas that all living organisms need to survive (oxygen) is a byproduct of the same process that plants undergo to trap solar radiations. So now you understand if there would be no green plants on this planet, what could happen. Test Item: 1 Photosynthesis Q 1.1: What is the ultimate source of energy? a) Plants b) Sun c) Animals d) Oxygen Q1.2 Plants prepared their food by using some materials present in nature. Name these materials. ---------------------------------------------------------------------------------------------- ------------------------------------------------------------------------------------------------------- Q1.3 How does carbon dioxide enters the plants? ----------------------------------------------------------------------------------------------- --------------------------------------------------------------------------------------------------- Q1.4 Carnivores are also dependent on green plants even though they eat flesh. Justify the statement. ------------------------------------------------------------------------------------------------------------------------ ------------------------------------------------------------------------------------------------------------------------- Q1.5 What do you think can happen if all the green cover of planet earth vanishes? --------------------------------------------------------------------------------------------------------------- ---------------------------------------------------------------------------------------------------------------- ….. TEST ITEM 2 TOOTH DECAY TEST ITEM 6 TOOTH DECAY A survey was conducted to determine the occurrence of tooth decay in teenagers of Mumbai city who visited a Dental College. The objective of the study was to analyze the current dietary habits, oral hygiene status, and the number of sugar exposures in teenagers by a questionnaire followed by clinical examination which was carried out using International Caries Detection and Assessment System (ICDAS) II to detect the profile of dental caries. Statistical Analysis: The data obtained from the questionnaire and examination wereanalyzed using Chi-square test. Most of the teenagers had a high rate of sweet consumption in between meals and poor knowledge of brushing techniques, fluoridated toothpaste, inter-dental aids, and mouth rinses. ICDAS showed a high incidence of caries in teenagers, especially in the lower arch. ICDAS II showed good accuracy in differentiating between non-cavitated and cavitated lesions which help to provide an accurate treatment plan for teenagers so that it prevents the progression of the lesion. Answer the following questions after analyzing the data given above: Q2.1)Do you think regular dental check up is important? Give reason. Ans:………………………………………………………………………………. Q2.2) How does consumption of aerated drinks affect dental health? Ans:………………………………………………………………………………. Q2.3) Out of the following which type of substance is preferred in toothpaste? a)Acids b)Bases c)Calcium d)All of these Ans:………………………………………………………………………………. Q2.4) Name two food items that are good for our teeth. Ans:………………………………………………………………………………. Q2.5) Which group of microorganisms cause tooth decay? Ans:………………………………………………………………………………. Q2.6) Is digestion affected by toothdecay?Justify Ans:………………………………………………………………………………. Q2.7) Write two symptoms of tooth decay. Ans:………………………………………………………………………………. Q2.8) When and how many times should you brush your teeth? Ans:………………………………………………………………………………. Q2.9) What can be used besides toothpaste for dental hygiene? Ans:………………………………………………………………………………. Q2.10) Suggest any one home remedy for tooth ache. Ans:………………………………………………………………………………. Q2.11) What are the different types of teeth? Ans:………………………………………………………………………………. Q2.12) Out of following which foods are not preferred during tooth ache? a) Spicy and oily food b) Sweet and salty food c) Hot and cold food d) None of the above Ans:………………………………………………………………………………. Q2.13) Can tooth cavity be treated? If yes, by whom? Ans:………………………………………………………………………………. Q2.14. The above survey was conducted on __________ of Mumbai city. Ans:………………………………………………………………………………. Q2.15.Which substance in chocolates is harmful for teeth? Ans:………………………………………………………………………………

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