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Rising levels of carbon dioxide in the atmosphere are a major cause of climate change, and now a new study has confirmed that atmospheric CO2 is also affecting the ocean chemistry and potentially harming sea life.
Montana State University scientist Robert Dore has been researching the water in the Pacific Ocean for almost two decades. We've been going to the same spot in the Pacific Ocean, and we try and characterize long-term change in the open ocean environment. And one of the key things that we measure is CO2 levels. And we've been able to record this increasing quantity of atmospheric CO2 into the ocean.
Scientists expected that as atmospheric CO2 increased, more and more of the carbon dioxide would be absorbed into the ocean, affecting the chemical balance of the sea water, with a potentially harmful impact on shellfish and coral in particular.
"As carbon dioxide dissolves(溶解) in the water, or seawater in this case, it forms a weak acid, carbonic acid," Dore explains. "And therefore, as the concentration of CO2 in the atmosphere goes up and that exchanges with the surface seawater, it drives the PH down, and makes it more acidic."
The seawater Dore and his colleagues have analyzed confirms what the theory predicts.
The effect was particular striking at about 250 meters down, and again at 500 meters. Dore and his colleagues came up with two possible explanations. It could be that surface water picked up CO2 and then moved to those depths. Or there could be a biological explanation.
"It's important to realize that the oceans are really becoming acidic. And it can have negative(消极的) impacts on a whole variety of sea life from fish to coral. It's potentially catastrophic."
【小题1】What can be the best title of the passage?

A.Sea Life Facing Danger
B.Scientist Researching Seawater
C.Oceans Becoming More Acidic
D.Climate Change Affecting Seawater
【小题2】With the increase of atmospheric CO2        .
A.more corals will appear in the sea
B.the surface water is becoming warmer
C.the chemical balance of the seawater is affected
D.the PH of the ocean out here has been increasing
【小题3】Which of the following shows the process of the impact of atmospheric CO2 on sea life?
a.Sea life is endangered.
b.CO2 goes into the surface water.
c.The ocean chemistry is affected.
d.CO2decreases the PH and makes the seawater more acidic.
e.CO2 levels in the atmosphere go up.

【小题4】Scientist Robert Dore came to the conclusion based on       .
A.his research and analysis
B.the expectation of other scientists
C.some former theory
D.a major cause of climate change


【小题1】A
【小题2】C
【小题3】B
【小题4】A  

解析试题分析:
【小题1】主旨题:从第一段的句子: Rising levels of carbon dioxide in the atmosphere are a major cause of climate change, atmospheric CO2 is also affecting the ocean chemistry and potentially harming sea life.可知文章主要讲的是海洋生物正在遭遇危险。选A
【小题2】细节题:从第四段的句子And therefore, as the concentration of CO2 in the atmosphere goes up and that exchanges with the surface seawater, it drives the PH down, and makes it more acidic."可知海水的化学平衡收到影响。选 C
【小题3】排序题:从第五段可知这个过程。选B
【小题4】细节题:从第二段和第六段可知答案是A  
考点:考查科普环保类文章
点评:这篇文章主要讲了二氧化碳的排放引起海水化学物质的改变从而是海洋动物受到危险,题型多样,细节题,主旨题,还有很新颖的表格题,学生即要求把握主旨,也要留意细节。

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A.the reason for obesity                    B.the lost cooking skills

C.the healthy eating                       D.the compulsory cooking classes

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A.To encourage teenagers to eat healthy food.

B.To reduce the country’s increasing obesity rate.

C.To stop parents from turning to pre-prepared convenience foods.

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B.They will be able to do some basic, simple recipes like a tomato sauce.

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D.They will be able to control the level of obesity in the whole country.

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1.The author tried to hitchhike but was rejected by single women drivers because        .

    A. they were not heading towards Manchester

    B. they thought most hitchhikers were dangerous

    C. hitchhiking had been banned and they didn’t want to break the law

    D. he was a strong man in strange clothes who seemed dangerous

2.Which of the following statements is not true according to the passage?

    A. Movies have discouraged people from hitchhiking

    B. Car ownership levels are lower in Romania than in the UK.

    C. 25% of UK people don’t have access to cars.

    D. Increased car ownership has reduced the need for hitchhiking.

3.The “fat blokes in red, spotted scarves” in Paragraph 3 most likely means     .

    A. murderous hitchhikers        B. friendly and talkative hitchhikers

    C. typical hitchhikers           D. strange hitchhikers like the author

4.According to the author, future hitchhikers are more likely to              .

    A. visit websites and find people to share cars with  

    B. stand by roads with their thumbs sticking out

    C. stick out signs with their destinations written on  

    D. wait for some kind people to pick them up

5.From the last paragraph, we know that the author          .

    A. frequently hitchhikes in Britain      

    B. plans to hitchhike across Europe

    C. thinks public transport is safer for travel

    D. is going to contact the tank commander

 

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