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English Senior High

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Speed Reading The rainforest is not the only place where animals are How Can We Save Endangered Species? In the modern world, many animals die from causes that are not natural. the species living in the rainforest. Every day, more and more areas of rainfore are cut down or burned, and all of the animals living there lose their habitat. and dying. Around cities, animals are facing similar situations. As cities humans move into the natural areas surrounding them. This means that animal living near humans must move to other areas. Those animals-or in some cases those species-which are not able to adapt or to find new homes eventually die. In recent years, efforts have been made to protect certain lands in order to prevent killing plant and animal species native to the area. State and national parks along with special areas for birds and wildlife, have been established to protect the natural homes of endangered species. Also, wildlife management programs have helped bring back some species from almost certain extinction. For example, fewer than 50 years ago, the North American bald eagle was in serious danger of extinction because too many farmers used DDT, a chemical that kills insects. Farmers stopped 10P 15 >> using DDT, and the bald eagle is no longer endangered today.m Although protected lands have been established and wildlife management programs keep an eye on highly endangered species, scientists have yet to determine if these efforts are enough. Is it possible to save all the plants and animals that are endangered today, or is it already too late? (259 words) da siqag 000 259 words ÷ ( ) seconds × 60 = () wpm ~99 wpm ---Beginner 100~149 wpm Intermediate 150 wpm ~ dvanced QAnswer T (true) or F (false). 1. In the modern world, animals living in the rainforest are losing their place to live. ( ) 2. Animals living around cities do not have the same problem as those living in the rainforest. 3. Animals which have lost their habitat near the cities cannot survive unless they can adapt or find new homes. () 4. People in the US saved bald eagles by not using DDT; this is an example of a successful wildlife management program. 5. Some scientists believe that wildlife management programs are not necessary () anymore. New words adapt /ədæpt/ wildlife/wáildlarf/ chemical/kémikal/ management /mænidzmant/ bald /bó:ld/ eagle/i:gl/ 24 Speed Reading insect/insekt/ Lesson Consi losing their home b i t

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Science Junior High

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150 第7章 運動とエネルギー 1 200gのおもりを0.5m 持ち上げる操作を, 図の装置1~3を用いて行った。 次の問いに答 えなさい。ただし、100gの物体にはたらく重 力の大きさを IN とし, おもりと斜面との摩擦, 定滑車や動滑車と糸との摩擦, おもり以外のも のの重さは考えないものとする。 動滑車 0.5m 0.5m (1) 装置1 を用いて, 200gのおもりを 0.5m の 高さまでゆっくりと持ち上げた。このとき必 要な仕事は何Jか。 装置1 装置2 装置3 ] (2) 装置2を用いて,200gのおもりを斜面に沿って 0.5m の高さまでゆっくりと引き上げた。おもりを引 き上げているとき,ばねばかりの目盛りの値は 0.5N であった。おもりを斜面に沿って動かした距離は 何mか。 ] [ (3) 装置3を用いて,200gのおもりを 0.5mの高さまでゆっくりと持ち上げているとき、ばねばかりの目 盛りの値は何N になるか。 ] (4) 文中の①,②にあてはまる語句を答えなさい。 [ ] O SAVE SIF] @[649A D[ [] ② 装置 2, 装置3では, おもりを直接真上に持ち上げる場合よりも小さな力で持ち上げることができるが、 力をはたらかせる距離は長くなる。 そのため, 力の大きさと力をはたらかせる距離の(①)は変わ らない。このことを ( ② )という。 もっと計算してみよう! P.152, P.153 計算アシスト! 2 仕事と仕事率について調べるため、次のような実験を行った。 【実験 1】図1のように,おもり, 滑車, ばねばかりを糸でモータ 一につなぎ, モーターの回転速度を一定に保って, 糸をゆっく り引き上げた。このとき, おもりが床をはなれた瞬間から5秒 ごとに床からのおもりの高さを記録し 図2 図1 モーター 2 練習問題 定滑車 200gの おもり、 ばねばかり 0.5m ス 実

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