Homework+answers

Page 102 Answers a. aggressive   b. anticipate   c. modified   d. tamper   e. supporters   f. edible   g. rigorous   h. allergic   Page 77 Example Answers a. **Like** primary schools, secondear schools need to use discipline to maintain order and cooporation for a positive learning environment.

b. A teenager, **just like** a young child under six years old, needs to learnnew sounds when learning a new language.

c. Learning a practical trade (like plumbing or carpentry) **is similar to** learning to be a doctor or a nurse, because practical understanding is necessary.

d. Examinations play an important role in sorting out high and low achievers in secondary school, **just as** they do in universities.

Page 82 Example Answers a. In primary schools, trachers can discipline students by concrete methods like detention; **by comparison**, discipline in universities uses methods such as lowering grades.

b. A teenager learning a foreign langauge has more mature conceptual development for learning; **in contrast**, young children under the age of six years old are restricted by their simple understanding of basic and practical words and meanings.

c. Learning a practical trade like plumbing or carpentry requires the learners to develop skills with their hands, **while** learning to be a writer of novels or a fine artist requires highly developed abstract thinking expressed in words or art.

d. Examinations in secondary schools are used to determine what help students require, **whereas** in universities they are used to determine if students have achived the required level.

Page 136 Example Summaries a. **Where will the children play?** There is an increasing problem of children not having enough room to play. There are a number of causes of this stiuation. Heavy pollution in many cities means that children are forced to spend more of their time inside. A combination of freeway construction, an increasing trend to live in high rise buildings and a lick of public parks also mean that many children find themselves playing on their computers more often than with other children. This situation may lead to some negative effects. Health experts warn of the dangers of obesity due to lack of exercise. There could also be some long term social effects of not playing with other children.

b. **Logging of trees creates deserts** One of the problems associated with logging trees is that it leads to the creation on desert areas. The situation is caused by a number of factors. Larger human populations has lead to expanding city or town areas which in turn require greater land clearance. The fact that growing populations require more food has also meant that farming areas have expanded requiring more logging. The effects of this are erosion, or the wearing out of exposed land, which leads to desertification. Deserts that already exist will expand further with a lack of trees to hold them back. Farm animal grazing areas will decrease and the area available for human inhabitation will also become lost if deserts keep expanding.

c. **Life expectancy - In some countries people are living longer** In some countries people are living longer and this is a result of a number of factors. Better medical facilities, technology and access to clean water all mean that people are able to live healthier and therefore longer lives. A safe environment in many countries also means that many people are living longer then they used to. Longer life expectancy has meant that population size has increased as people are living into their 80s and 90s. This has also had the result of an increasing older population.