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理科 中学生

(5)(6)(7)が分からないので教えていただきたいです。

問題演習プリント 地震の性質 *. 図1は, 地震が発生した場所と観測地点の位置関係を表したものであり, 図中のAは, 地下の地震が起こっ に場所, BはA の真上の地表の地点を示している。図2は、ある地震のゆれをP, Q, Rの3つの観測地点 で記録したもので, A, B はどちらもこの地震で発生した波の到着時刻と震源からの距離の関係を表したグ ラフである。次の各問いに答えなさい。 図1 観測地点 (1)図1中のA, Bをそれぞれ何というか。 (2) 図2中の(ア), (イ)のゆれをそれぞれ何というか。 (3) 図2のA, Bは, それぞれ何という波の到着時刻と震源からの 距離の関係を表しているか。 (4)図2中の(ア)のゆれが続く時間は, 図からわかるように, (3)で 答えた2つの波の到着時刻の差である。 この時間を何というか。 (5) Aのグラフより(ア)のゆれを引き起こす波の速さを求めると, 何 km/s か。 ) Bのグラフより(イ)のゆれを引引き起こす波の速さを求めると, 何 km/s か。 (7)(5),(6)の値を用いて, 震源原からの距離が468km の観測地点で (ア)のゆれが続く時間を求めなさい。 B 図2 A B 600- 500- 420 400F Mamin R 300 273 200- (km) 140 100- OL 14分 0秒 15分 0秒 14分25秒 16分 0秒 時刻 17分 0秒 く解答欄> 震源からの距離

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英語 中学生

長文です。答えはイ何ですが、その根拠となるところがわかりません。

(*印の付いている単語·語句には, 本文のあとに [注] がある。) There are many museums and *theme parks around Tokyo. Some of them teach people about the history of Japan, like *Edo Wonderland in Nikko and the "Edo-Tokyo Museum in Ryogoku. They are popular places for school trips because students can enjoy learning about Japanese history. I remember one of my school trips. When I was a student in Australia, we went on a school trip to Old Sydney Town. It was a theme park that *recreated the *past, just nke Edo Wonderland in Nikko. Old Svdnev Town was an hour away from Sydney Dy bus. 1t had more than 30 buildings. They were made in the same 'style as buildings in 1803. Many *actors were working at the theme park. They *wore old-style clothes, spoke old-style English, and "pretended to live in the town. “Horse-drawn wagons went up and down the streets. upin My friends and I were excited to see the actors' "performances. People drank at a "pub, sang old songs and danced in the streets. Some of them pretended to “fight a duel Some museum “staff gave us short history lessons, and we enjoyed listening to them very much. I remember Old Sydney Town was very exciting, because it brought us to another world. Old Sydney Town closed about 30 years after it opened. Many people visited there at first, but the number of people visiting there "gradually went down. The buildings started to become old. and more and more actors left Old Sydney Town. There were a lot of people who enjoyed visiting Old Sydney Town when they were children. And later, they took their own children there, but they said it was not as exciting as before. Why did Old Sydney Town close? There are many different "opinions about it. Some people say young people now like to play video games, and these young people think that a trip through time is not very exciting. Other people believe that Old Sydney Town did not *attract many people because it could not make new and exciting *entertainment. Times change and people also change. New "technology and the Internet can make new kinds of entertainment, and people can enjoy them at home. New building *materials can now make buildings that look like something from the future. New technology will make us more surprised. But it is also very important for us to keep old culture and entertainment. Maybe some of these things are not seen in everyday life, but they make a "link with the past. For example, if you go to see kabuki, maybe you will think about Japanese people who lived in the past. Culture *is made up of all the things people did in the past, and it makesa country and its people "unique. If we forget about the past, then we lose our culture. 10

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