阅读判断
Europas watery underworld
Europa, one of Jupiters 63 known moons, looks bright and icy on the surface. But appearances can be deceiving: Miles within its cracked, frigid shell, Europa probably hides giant pools of liquid water. Where scientists find liquid water, they hope to find life as well.
Since we cant go diving into Europas depths just yet, scientists instead have to investigate the moons surface for clues to what lies beneath. In a new study, scientists investigated one group of strange ice patterns on Europa and concluded that the formations mark the top of an underground pool that holds as much water as the U.S. Great Lakes.
Pictures of Europa, which is slightly smaller than Earths moon, clearly show a tangled, icy mishmash of lines and cracks known as chaos terrains. These chaotic places cover more than half of Europa. For more than 10 years, scientists have wondered what causes the formations. The new study suggests that they arise from the mixing of vast underground stores of liquid water with icy material near the surface.
For scientists who suspect that Europa also may be hiding life beneath its icy surface, the news about the new lake is exciting.
It would be great if these lakes harbored life, Britney Schmidt, a planetary scientist who worked on the study, told Science News. But even if they didnt, they say that Europa is doing something interesting and active right now.
Schmidt, a scientist at the University of Texas at Austin, and her colleagues wanted to know how chaos terrains form. Since they couldnt rocket to Europa to see for themselves, they searched for similar formations here on Earth. They studied collapsed ice shelves in Antarctica and icy caps on volcanoes in Iceland. Those features on Earth formed when liquid water mixed with ice. The scientists now suspect something similar might be happening on Europa: that as water and ice of different temperatures mingle and shift, the surface fractures. This would explain the jumbled ice sculptures.
Fracturing catastrophically disrupts the ice in the same way that it causes ice shelves to collapse on Earth, Schmidt told Science News. She and her team found that the process could be causing chaos terrains to form quickly on Europa.
The new study suggests that on this moon, elements such as oxygen from the surface blend with the deep bodies of water. That mixture may create an environment that supports life.
16. The liquid water of an underground pool of Europa is estimated xxxxx of the US Great lakes.
A. Right B. Wrong C. Not mention
答案:A
17. The strange ice patterns on Europa are formed as a result of a xxxxx underground water pool.
A. Right B. Wrong C. Not mention
答案:B
18. Europa is the most recently discovered one among Jupiters
A. Right B. Wrong C. Not mention
答案:C
19. The size of Europa is a bit larger than that of Earths moon.
A. Right B. Wrong C. Not mention
答案:B
20. Schmidt and her colleagues are the first group of scientists xxxxx Europa.
A. Right B. Wrong C. Not mention
答案:B
21. The formations on Europas surface are rather unique in the
A. Right B. Wrong C. Not mention
答案:B
22. The existence of liquid water is a necessity for a life-support
A. Right B. Wrong C. Not mention
答案:A
高校研究生为流浪汉叫外卖 得到阿里巴巴奖励
国际英语资讯:Zimbabwean President Mugabe resigns
国际英语资讯:Irans top leader says collapse of IS is defeat of U.S. in region
国际英语资讯:Macron holds phone talks with Iranian, Israeli leaders over Lebanon crisis
Protect Private Information 保护私人信息
替罪羊(scapegoat)、败家羊(black sheep),为何英语中背锅的总是羊
女性择偶时最看重的到底是什么?排在第一位的是……
Acidic oceans will affect sea life 酸化海洋将威胁海洋生物
英语动词不定式用法小测验
Food Choice 食品选择
体坛英语资讯:Kenya s Obiri targets quest to recapture World Indoor circuit
数据显示 中国女性在高等教育等多个方面已超越男性
国内英语资讯:Boeing 747s finally find buyers on Taobao
德国政府要求家长“毁掉”孩子的智能手表
2017年12月英语六级作文范文:考研热潮
专家:2018年全球强震或增至20次 这些地区的民众要警惕
39人命丧货柜车 英警方正在核实遇难者身份
国内英语资讯:Xi writes to traveling troupe in N. Chinas Inner Mongolia
听说你一个人住?这些独居安全窍门要记好
男性更喜欢哪种身材的女性?
The Eye-contact in Communication 交流中的眼神接触
腾讯市值突破5000亿美元 超过脸书成为全球第五
国际英语资讯:Putin, Trump stress diplomatic solution to Korean Peninsula issue -- Kremlin
研究发现,英国500万烟民在过去一年中尝试戒烟
张靓颖挤下霉霉和水果姐?维密表演嘉宾公布!
国内英语资讯:China ready to further boost cooperation with ASEAN: FM
第一次约会一定要定在周日
Saving Money or Spending Money 存钱还是花钱
中国最美图书馆火到国外,外媒纷纷为它打call!
国际英语资讯:Merkels CDU, President Steinmeier make appeals to avert German re-elections
不限 |
英语教案 |
英语课件 |
英语试题 |
不限 |
不限 |
上册 |
下册 |
不限 |