Every boy and girl (1)/were ready to take part (2)/ in the dance competition (3)/.No error (4)
P: But to read nothing but books of fiction is like eating nothing but cakes.Q: There are many noble books on history, biography, philosophy etc.R: For this we can choose according to our taste.S: As we need plain food for the body so we must have serious reading.
One who studies families
At one’s finger tip
A majority of students ______ left the school.
To give the gun
Trenches were dug all overP: On which we livedQ: Japanese Air-raids and there were severalR: Along the length of the roadS: New Delhi in the anticipation of
Dog moved ______ towards his master.
Sleep is indispensable for maintaining immunological (1)/function, which is a key to prevent (2)/and recover from infectious diseases (3)/.No error (4)
Comprehension:Read the following information carefully and answer the given questions.While greenhouse gases are warming Earth’s surface, they’re also causing rapid cooling far above us, at the edge of space. In fact, the upper atmosphere about 90km above Antarctica is cooling at a rate ten times faster than the average warming at the planet’s surface.Our new research has precisely measured this cooling rate and revealed an important discovery: a new four-year temperature cycle in the polar atmosphere. The results, based on 24 years of continuous measurements by Australian scientists in Antarctica, were published in two papers this month.The findings show Earth’s upper atmosphere, in a region called the “mesosphere”, is extremely sensitive to rising greenhouse gas concentrations. This provides a new opportunity to monitor how well government interventions to reduce emissions are working. Since the 1990s, scientists at Australia’s Davis research station have taken more than 600,000 measurements of the temperatures in the upper atmosphere above Antarctica. We’ve done this using sensitive optical instruments called spectrometers.These instruments analyse the infrared glow radiating from so-called hydroxyl molecules, which exist in a thin layer about 87km above Earth’s surface. This “airglow” allows us to measure the temperature in this part of the atmosphere.Our results show that in the high atmosphere above Antarctica, carbon dioxide and other greenhouse gases do not have the warming effect they do in the lower atmosphere (by colliding with other molecules). Instead, the excess energy is radiated to space, causing a cooling effect.Our new research more accurately determines this cooling rate. Over 24 years, the upper atmosphere temperature has cooled by about 3℃, or 1.2℃ per decade. That is about ten times greater than the average warming in the lower atmosphere – about 1.3℃ over the past century.Our project also monitors the spectacular natural phenomenon known as “noctilucent” or “night-shining” clouds. While beautiful, the more frequent occurrence of these clouds is considered a bad sign for climate change. Our research also monitors how cooling temperatures are affecting the occurrence of noctilucent clouds. There is already some evidence the clouds are becoming brighter and more widespread in the Northern Hemisphere. Hence, long term monitoring is important to measure change and test and calibrate ever more complex climate models.
They will be abdicated the king
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