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7과
다음 글을 읽고 물음에 답하시오. [7과]
A kite flies in the same way as an airplane ⓐdoes. To make a kite fly, ⓑit is sometimes necessary to run with it behind you. This creates lift and pushes the kite up. Once the kite gets up in the sky ⓒwhere the wind is strong enough, you can stop running, and the kite will fly. Instead of engines and propellers, the tension from someone pulling on the kite's string ⓓproviding thrust for a kite. ⓔFor a kite to remain flying, the amount of lift needs to be equal to the amount of weight so that those forces balance each other. Likewise, thrust and drag must also be equivalent.
위 글의 밑줄 친 ⓐ~ⓔ중, 어법상 어색한 것은?1
① ⓐ ② ⓑ ③ ⓒ ④ ⓓ ⑤ ⓔ
위 글의 제목으로 가장 적절한 것은?2
① What Makes a Kite Fly
② Safety Rules about Kite Flying ③ How to Make a Traditional Kite ④ Practical Uses of Kites in the Past ⑤ Understanding the Components of a Kite
다음 글을 읽고 물음에 답하시오. [7과]
Bangpaeyeon, the most popular Korean kite, looks simple, but is the toughest of all kites flown in Korea. (A) This rectangular kite is traditionally made from five bamboo sticks and is covered with traditional Korean paper. (B) It is always made so that the width and length are in a 2-by-3 proportion. (C) What this hole does is control the air. (D) The push of air on the front of the kite is greatly reduced because some of the wind passes through the hole to the back. (E) This allows you to turn the kite quickly. Without the hole, it would not be easy to control. In addition, the kite is not easily damaged by a strong wind.
위 글의 흐름으로 보아, 다음 문장이 들어가기에 가장 적절 한 곳은?3
Unlike kites in other countries, it has a circular hole in the center, with a diameter half the width of the kite.
① ⓐ ② ⓑ ③ ⓒ ④ ⓓ ⑤ ⓔ
위 글에서 언급되지 않은 것은?4
① the shape of Bangpaeyeon ② the ways to make Bangpaeyeon ③ materials used to make Bangpaeyeon ④ the function of the hole of Bangpaeyeon ⑤ the characteristics of Bangpaeyeon
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다음 글의 내용을 한 문장으로 요약하고자 한다. 빈칸 (A), (B)에 들어갈 말로 가장 적절한 것은? [7과]5
A tail is sometimes added to a kite. It can help make a kite fly more stably by adding not just some weight but also drag to its lower end. The tail should have the right length, though. Adding a short tail, for example, a 10 cm tail, will make the kite spin and roll around a lot. Adding a longer tail, such as a 100 cm tail, can help the kite fly well, allowing it to go high without rolling very much. Our ancestors knew all this and made the tail the right length.
↓
Adding a tail with the (A)___________ length to a kite (B)___________ its stability.
(A) (B) ① reasonable weakens ② suitable enhances ③ equal sacrifices ④ perfect reduces ⑤ average destroys 다음 대화 내용과 일치하도록 빈칸에 들어갈 가장 적절한 말을 고르면? [7과]6
⦁Woman : My flying machine relies on human strength.
⦁Man : Interesting. The wings are covered with paper. Why?
⦁Woman : Because other materials are too heavy. ⦁Man : So, what do your machine and airplanes have in common?
⦁Woman : I designed the machine in accordance with the principles of flight.
⦁Man : Oh, I see. ↓
The woman used paper for the wings of her flying machine because it is __________ than other materials.
① heavier ② lighter ③ cheaper ④ stronger ⑤ more common
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다음 글을 읽고 물음에 답하시오. [7과]
There are four main forces involve in flight: lift, weight, thrust, and drag. Lift is created by the difference in air pressure between the air flowing over an airplane's wings and the air flowing under them. Lift is opposed by weight, which is the force of gravity that is constantly pulling the airplane down. If the amount of lift is greater than the amount of weight, the airplane will rise. At the same time, thrust is created by the airplane's engines and propellers pushed the airplane forward. Opposed to that force is drag, which is the air pushing the airplane back. If thrust is greater than drag, the airplane will move forward. The interaction between these four forces making airplanes fly.
Airplanes are designed with these forces in mind. The engines and propellers provide thrust to move airplanes forward. The wings are shaped so that air has to travel faster over them than under them. According to Bernoulli's principle, an increase in the speed of air results in a decrease in pressure. Thus, air traveling faster creates lower pressure above the wings, and the higher pressure under the wings pushes the airplane up, creating lift.
위 글의 내용과 일치하지 않는 것은?7
① Lift is the force that acts upward against weight. ② Weight pulls the plane toward Earth.
③ An airplane generates thrust with its engines and propellers.
④ Thrust is the force that moves an airplane forward.
⑤ If drag becomes greater than thrust, the plane
위 글의 내용과 일치하도록, 빈칸 (A)~(E)에 들어갈 가장 적절한 말을 <보기>에서 골라 쓰시오. (단, 필요시 단어의 형태를 바꿀 것.)8
Four main forces involved in flight (A)__________ the flight abilities of planes. The basic principles of flight, which include elementary physics concepts, can be easily (B)__________ in the structure of an airplane. Airplane's wings are designed to create lift, which is caused by the difference in air pressure when air flows under and over an airplane's wings. They are shaped so that air has to travel faster over the top of the wings than underneath them. The (C)_________ for designing wings this way is explained in Bernoulli's principle, which states that fast-moving air is at (D)_________ pressure than slow-moving air. Therefore, the pressure above the wings is lower than the pressure below, and this creates the lift that pushes the plane
(E)___________.
<보기>
abandon / affect / damage / downward / eliminate / higher / lower / reason / observe / upward
(A)_________________ (B)________________
(C)_________________ (D)________________
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다음 밑줄 친 (A), (B), (C)의 문맥에 맞는 형태로 가장 적 절한 것은? [7과]9
Kevin proposed a new building (A)[design] to resist heavy winds affecting its area. He explained the proposal with his things (B)[spread] out on the presentation table. The audience at frist rejected his proposal with their arms (C)[fold]. As time went on, however, they showed interest and accepted it.
(A) (B) (C) ① designing spreadingfolding ② designed spreadingfolded ③ designed spread folded ④ designing spread folded ⑤ designing spread folding
다음 글을 읽고 물음에 답하시오. [7과]
Why can a bird stand on a power line and not get shocked? This has to do with how electricity works. Electricity flows between two points that differ in voltage. (A) If a bird touches two wires that differ in voltage, however, electricity will flow through the bird and will probably give it an electric shock. (B)
If your kite or balloon got caught on a power line and you touched the string, what would happen? (C) Of course, electricity would travel down the string and into your body on its way to the ground. (D) This would mean a serious shock! So keep in mind that you must not fly kites near power lines. (E) Basic science will help you stay safe near electricity and can answer puzzling questions about electricity.
위 글의 흐름으로 보아, 주어진 문장이 들어가기에 가장 적 절한 것은?10
Since there is no voltage difference between the bird's feet, electricity does not flow through the bird's body. ① A ② B ③ C ④ D ⑤ E 위 글의 내용과 일치하지 않는 것은?11 ① 전선에 걸린 연의 줄을 만지면 감전된다. ② 감전은 전기가 작용하는 방식과 관련된다. ③ 전기는 전압이 다른 두 지점 사이를 흐른다. ④ 기초과학에 대한 지식이 전기로부터 우리의 안전을 지켜 준다. ⑤ 새가 전압이 다른 두 전선을 동시에 건드리면 감전되지 않는다.
텍스트를 입력하세요. 정답 ④ 1 ① 2 ③ 3 ② 4 ② 5 ② 6 ⑤ 7
(A) affect / (B) observed / (C) reason / (D) lower / (E) upward 8 유사 정답 (E) higher ③ 9 ① 10 ⑤ 11
