《雅思作文8分范文(共6页).docx》由会员分享，可在线阅读，更多相关《雅思作文8分范文(共6页).docx（6页珍藏版）》请在taowenge.com淘文阁网|工程机械CAD图纸|机械工程制图|CAD装配图下载|SolidWorks_CaTia_CAD_UG_PROE_设计图分享下载上搜索。
1、精选优质文档-倾情为你奉上Eating sweet foods produces acid in the mouth which can cause tooth decay Eating sweet foods produces acid in the mouth, which can cause tooth decay. (High acid levels are measured by low pH values)Describe the information below and discuss the implications for dental health. Sample ans
2、wer 1:The provided line graph illustrates the acid level in the mouth which is created by consuming sweet foods specifically sugar and honey and possibility of tooth decay because of this acid level. As is presented in the line-graph, the higher the acid level the lower the pH value and a pH level l
3、ess than 5.5 is detrimental for the tooth and causes the tooth decay.The given line graph gives information on amount of acid produced in our mouth by eating sugar and honey made from three different resources namely fruit, sugarcane and honey. Also the graph estimates the time taken by them to reac
4、h different acid levels which is related to the tooth decay.(没说好没说坏，用be related to)The given graph shows that the initial pH level of our mouth is 7 which begins to fall after consuming sweet foods. When we eat sweet item like cane sugar, the pH level drops to 3.5 in 5 minutes and remain in danger l
5、evel (below pH level 5.5) for more than 30 minutes. Consuming fruit sugar drops the pH level nearly to 4 and remains in danger level for about 20 minutes. And finally when we eat honey, the pH level fall below 5 and it remains under risk level for about 13 minutes. As the low pH level means higher a
6、cidity and causes tooth decay, cane sugar among the mentioned three food items is the most harmful for our tooth. (Approximately 186 words) When the pH level in the mouth is above 5.5, acidity remains in such a level that teeth are unlikely to be in danger from decay. Sweet foods, however, cause pH
7、in the mouth to drop for a time, and the longer the pH levels remain below 5.5, the greater the possibility for decay to occur. The illustration compares the fruit sugar, cane sugar and honeys, which are the most common ingredients of sweet foods, causes the pH level to drop below the danger level a
8、fter 5 minutes.Among these 3 sweet items, cane sugar decrease the pH level most quickly and causes the ph to remain under the danger level for the longest period (over 30 minutes) and thus produce the greatest risk among the three. After consuming the cane sugar, the pH level drops to level 3.5 and
9、remains there for over half an hour. On the other hand, fruit sugar causes the acidity level of mouth to fall under pH level 4 in 5 minutes and remains under threat level for 20 minutes. Finally the honey appears to be less risky among the three causes the pH level to drop to 4.7 in 5 minutes and pr
10、oceed to above pH 5.5 level within 15 minutes of consumption.In conclusion all of the sweet items possess the possibility of causing tooth decay and honey and fruit sugar are likely to cause less decay than the cane sugar does.(Approximately 271 words) ( These 2 model answers can be followed as exam
11、ples of standard answers. However, please note there are other good ways of writing possible good answer.) Tips for answering this Writing Task 1 Question:1. Please note that the question asks you to describe the information presented in the graph and also discuss the implications for dental health.
12、 So you have to mention which food items creates more acid level for longer time and are comparatively injurious for teeth. You must classify which food items are comparatively safe as well. First compare the three food items in terms of the acid level they create in mouth and how long this acid lev
13、el remains in danger level. Then suggest which food items among cane sugar, fruit sugar and honey is comparatively safe and which item/ items are not.2. Notice the following trends from the given line graphs: a) Higher the acid level, the lower the pH level. b) pH level below 5.5 is dangerous for th
14、e tooth as the tooth decay occurs below 5.5 pH level. c) Honey is comparatively safer than other two food items as it decreases the pH level of the mouth slowly and the acid level goes to the safe level very quickly. On the other hand after consuming cane sugar the pH level falls under danger level
15、quickly and remains there for the longest time among the three food items.3. To answer this question first mention the acid / pH level which occurs the tooth decay and the level when it is safe. Now take the three given food items and mention them individually: how longer it takes to reach the pH le
16、vel of mouth below 5.5 after consuming this food item and then how longer this level remains under 5.5. Finally suggest which food items are comparatively safer and which are not. Summary of the Line Graph: After consuming different sweet food items, the acid level of our mouth increases. The higher
17、 acid level is presented by the lower pH value. When the pH value gets under 5.5, the tooth decay occurs. Among the given three food items i.e. cane sugar, fruit sugar and honey, the third item (honey) is comparatively safer for our dental health. This is because after consuming all the honey the pH
18、 level remains under danger level for about 12 minutes compared to the 20 minutes for the fruit sugar and 31 minutes for cane sugar. This also indicates that the cane sugar is more likely to damage our tooth among the provided three sweet food items. Sample Answer 3:The bar graph illustrates the aci
19、d level of mouth after consumption of three different nutrients such as fruit sugar, cane sugar and honey over the period of forty minutes. According to the bar graph, it is obvious that cane sugar is the most acidic nutrient.After the consumption of cane sugar, acidity level of mount increased shar
20、ply in five minutes and reached 3.5 pH level. From now onwards acidity level of mouth decreases steadily and reached the normal level after thirty-five minutes. However, teeth remained in dangerous level more than 25 minutes.Another acidic nutrient is fruit sugar. After the consumption, pH level of
21、mouth decreased hurriedly and reached 4.25 in five minutes. After that, level of acidity of month reached normal level in 15 minutes. Therefore, teeth remained in dangerous level for 15 minutes. The last and the least acidic nutrient is honey, after the consumption of honey acidity level of mouth in
22、creased dramatically in five minutes and reached 5 pH level and then, plateau for 5 minutes and from now onward decreased moderately. However, teeth remained in an acidic environment for 10 minutes.To conclude, the more hazardous nutrient for teeth is cane sugar because teeth remained in an acidic e
23、nvironment for more than 25 minutes.(Approximately 208 words) ( This model answer was submitted by an IELTS Student as a comment. ) Sample Answer 4:The maximum level of acidity produced by sugary content is reached 5 minutes after consuming them reaching up to 3.5 pH for sugarcane, 4 pH for fruit su
24、gar and 5 pH for honey. After this time the acidity level declines for cane and fruit sugar, whereas it is sustained for 10 minutes for honey. Honey takes approximately 15 minutes to reach the pH of 5.5. It is at this pH at which tooth decay is unlikely. Fruit sugar takes 20 minutes and cane sugar t
25、akes the maximum time to reach this safety level. After 40 minutes all three sugars reach neutral pH that is 7.Acidity promotes tooth decay which results in teeth cavities. Proper brushing and mouth washing can eliminate sugar particles and may protect teeth from the hazards of high acid levels.From
26、 the given data it is clear that cane sugar has highest acidity and its acid content above safety level is sustained for the longest period in mouth. Therefore it should be avoided. Honey is the safest sugary food which causes least chances of tooth decay.(Approximately 230 words | Written by - Anum
27、 Faisal ) Answers Submitted by IELTS candidates: Model Answer 1: The given line graph gives information on the acid level produced in our mouth decay after consuming fruit sugar, cane sugar and honey and compares the possible implication those three sweet food items have on our tooth decay. As is ob
28、served from the given presentation, honey causes the least tooth decay while the cane sugar possesses the possibility of decaying our tooth among the mentioned three sweet foods.The graph shows that different acid level is created in mouth after we consume different sweet food items. High acid level
29、 is measured by low pH level and tooth decay is occurred when the pH level goes below the 5.5. After we eat fruit sugar, the pH level of our mouth declines below 5.5 in 5 minutes and remain in danger level until 13 minutes. Similarly Cane sugar causes the pH level to get under pH level 5.5 in 5 minu
30、tes but it remains in danger level for more than 30 minutes which shows the fact that can sugar can cause more tooth decay than the fruit sugar. Finally, in 5 minutes the pH level of our mouth reaches to danger level in 5 minutes after we take honey and this level remain in danger zone for about 20
31、minutes.The comparison of the three sweet items indicate that the honey is comparatively safer for our dental health as it posses the least possibility of tooth decay while cane sugar possesses the most danger to our dental health as it would possibly create the most tooth decay. (Approximately 225
32、words) Sample Answer 2: The given graph depicts comparison in acid level in mouth after consuming sugar/honey. One axis of graph contains PH level which measures acidic level and the other axis reflects time line after consuming, spaced out equally with 5 minutes gap.As per the graph, tooth decay st
33、arts when the PH level falls beneath 5.5 on the scale and it is quite clear that PH level falls rapidly after consuming all three commodities but took least time to recover in case of honey and the maximum is in case of cane sugar.To start with, the PH level is at 7 and begins to decline after consu
34、ming each item and the rate at which it falls is maximum in case of cane sugar. It crosses the danger level within a span of 5 minutes and by the end of 5 minute, PH level reaches its lowest point in case of cane sugar i.e. 3.5 and the same for fruit sugar and honey is 4.25 and 4.75 respectively.Aft
35、er 5 minutes has elapsed, the trend line tends to be inverted and from here on the PH level initiate its recovery in case of fruit/cane sugar though it remains at its lowest in case of honey for a further 5 minute period. On reaching 10 minute mark, PH level in case of honey seems to recover at bris
36、k pace taking over the recovery of other items and reaching the safe zone within a span of 15 minutes. Fruit sugar PH level crosses the line before 20 minutes but cane sugar PH level took almost double the time of honey to recover from tooth decay. Honey PH level normalize by the end of 25 minute ma
37、rk and the same is 32 minutes and 40 minutes in case of fruit sugar and cane sugar respectively.All in all it can be said that Honey is the least acidic food item and the fastest to recover among the three. On the other hand cane sugar is the most acidic and slowest to recover. Model Answer 3: The g
38、iven line graph illustrates the various acid levels in the mouth related to three different sweet foods such as fruit sugar, cane sugar and honey. The first point to note is that acid levels due to these different sweets are at a level at tooth decay is unlikely to occur both at the time of eating a
39、nd after 15 minutes of eating. At the moment of eating of three sweets, acid levels are very low and equal at 7 pH. Then after 5 minutes it dropped to a pH of 3.5, 4.5, and 5 by cane and fruit sugar and honey respectively. Acid levels in the mouth gradually decrease and reached to minimum value with
40、in half an hour of cane sugar eating. Acid variations in mouth after eating fruit and cane sugar are almost equal for the next 5 minutes and followed by a difference of 1 pH value for the next 20 minutes. However, after 30minutes of eating sugar and cane sugar, pH value raised and reached to 7 and the acid level hit to the lowest level. To sum up, it is clear from the graph that, the given sweets produces high levels of acids in the mouth soon after eating, but reaches to safe level which tooth decay is not likely to occur within 10-15 minutes. 专心-专注-专业