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For Teachers: When you use Dual method, please have the students do the shadowing after you. Then havethem read by them self. And correct their pronunciation, through all of this material.

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Part2 Lesson7.G2-2B-2018.3chobundokkai スマホの方は横にしてご覧下さい

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Mystery in the Sky

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If you look up at the sky on a clear summer night, you might be lucky enoughto see a special type of cloud glowing in the darkness. These clouds are strange
and rare events called noctilucent clouds (NLCs). NLCs are different from theclouds we see every day. Most clouds form near the earth’s surface— usuallywithin 10 kilometers of the ground. ( 24 ), NLCs are formed around 80 kilometers
away, in a section of the sky called the mesosphere. NLCs are also colorful--generally bright blue, but sometimes red, yellow, or white.

6789101112*Choose the correct answer to fill in the blank from these choices.

1314(24) 1 For instance15

2 In contrast

3 Since then4 Even so

Further Questions & Sample Answers For Teachers: Please use the direct method like CALLANfor this part. 1. Ask student to answer the question on their own first. 2. Then read the “sample answer”. 3. Tell
student to close their eyes. 4. Let them repeat after you again. Because student can’t see the answer. 5. Have thestudent try to memorize the answer. 6. Once they have memorized the answer, ask the question one last time.
161718192021222324251) What might can we see at the sky on a clear summer night?
1) We might can see a special type of cloud glowing in the darkness.
2) Where are NLCs formed?
2)NLCs are formed 80 kilometers away, in a section of the sky called mesosphere.
Scientists believe that, like normal clouds, NLCs are made of tiny ice crystals.
However, in the mesosphere, it is usually ( 25 ). In order for ice crystals to formand create clouds, there must be water and dust for that water to stick to. NLCs
are only able to form in the summer, when winds carry water up to themesosphere from lower levels of the atmosphere.

26*Choose the correct answer to fill in the blank from these choices.

27(25) 1 too warm for people to see
3 too dark for scientist to study

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3132

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2 too dry for clouds to form
4 too windy for normal clouds

Further Questions & Sample Answers3) What do scientists believe NLCs are made of?
3) Scientists believe that NLCs are made of tiny ice crystals.
4) When do NLCs able to form?
4) NLCs are able to form when winds carry water up to the mesosphere from theatmosphere.
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NLCs have only appeared in recent times. In fact, the first NLCs were recorded
36 in 1885, two years after a volcano erupted in Krakatoa, Indonesia. Scientists
37 believe that the volcano released huge amounts of dust into the mesosphere,
38 which allowed NLCs to form. Although this may explain why NLCs were seen
39 after the eruption, it does not explain the NLCs that occur today. Some scientist
40 how believe that NLCs are ( 26 ). For one this, NLCs did not start to appear until
41 the modern age, when carbon dioxide and other gases began to increase. For
42 another, they are becoming more frequent and widespread as temperatures rise.

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43*Choose the correct answer to fill in the blank from these choices.

44(26)

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46
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49

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1 going to disappear soon
3 dangerous for humans

2 caused mainly by volcanoes
4 related to global warming

Further Questions & Sample Answers5) When was the first NLCs recorded?
5)It was recorded in 1885,two years after a volcano erupted in Krakatoa,Indonesia.
6) What do some scientists believe NLCs are related to?
6) Some scientists believe that NLCs are related to global warming.

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Answers: (24)2 (25)2(26)4