The ozone layer of the atmosphere is the area in the stratosphere that has the highest percentage of ozone. The purpose of the ozone is to shield and...Become a member and unlock all Study Answers Start today. Try it now Create an ...
People plant a great number of young trees in the mountains.When the trees grow big and tall enough, they are cut down by workers and carried out of the mountains to the paper mill where fine paper is made from wood.Then it is taken to every corner of the country and used for differe...
A. to inform readers about the ozone layer B. to inform readers about global warming C. to inform readers about the effects of harmful chemicals on Earth's atmosphere D. to inform readers about chlorofluorocarbons 相关知识点: 试题来源: 解析 C ...
How does an ore differ from a mineral? Name the three general categories of procedures needed to produce pure metals from ores. Describe the purpose of each. What is the research that occurred between 1900-2000 , was it basic or applied research, and how it impacted the human life...
A rare hole has opened up in the ozone layer above the Arctic, in what scientists say is the result of unusually low temperatures in the atmosphere above the north pole. The hole, which has been (racked from space and the ground over the past few days, has reached record dimensions, but...
Distillation is used by chemists to purify compounds in solution or separating mixtures of solutes. This process is also used for commercial purposes. The purpose includes collecting different volatile ‘fractions’ as they are produced. In this separation technique, either the concentration of a parti...
ozone itself is also a potent antimicrobial.So we can speculate that part of the reason it may be so effective is that it is pulling double duty— killing bacteria, viruses, fungi, etc., and provoking the immune system to attack and clean up the infection simultaneously. This double effect...
The 75. purpose of the study was to find out which method would help the students learn better. The scientists thought Group Two would win. But to their surprise, Group One did a better job. Since you take notes by hand, stick to it! Good notes can 76. led to less stress(压力)...
[translate] ad'amboise , learning dancing is to learn how to live a better life d'amboise,学会跳舞是学会如何居住更好的生活 [translate] aWhy is you have to raise money what's the purpose if you don't mind me asking 为什么是您必须筹集金钱什么是目的,如果您不介意我要求 [translate] ...
In the 1970s, scientists found that there was a large-scale depletion of the ozone layer, resultinginwhat iscommonlyreferredtoas “ozone hole” in the atmosphere. legco.gov.hk legco.gov.hk 早在七十年代 , 科學家已發現臭氧層出現大規模消耗 , 以致在大氣層形成孔洞 , 我們一般稱之為「臭氧洞」...