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A young engineer named Lila loved solving practical problems. In her city, many people wasted water without noticing. Leaky pipes dripped for days, and sprinklers ran during rain. Lila believed that small changes could save a great amount.

She joined a school science fair with a simple idea. She built a low cost sensor that listened for steady dripping sounds. When it detected a leak, it sent a message to a phone app. The app also suggested easy steps, like tightening a valve.

Lila tested her device in her apartment building with permission. Within two weeks, the manager fixed three hidden leaks. The water bill dropped, and neighbors became more careful. Some even reported leaks they had ignored before.

Lila did not claim her invention was perfect. Loud music sometimes confused the sensor, and thick walls reduced its accuracy. Still, her project showed that careful observation and teamwork can protect shared resources.

Read the passage, then answer: Which option provides the most accurate summary?

In nineteen twenty-eight, a scientist named Alexander Fleming returned to his lab in London. He noticed that a dish of bacteria had been left uncovered. A fuzzy mold had grown on part of the dish. Around the mold, the bacteria had stopped growing. Fleming realized the mold was making a substance that killed germs.

Fleming called the substance penicillin. At first, he struggled to collect enough of it. He also could not easily keep it strong and pure. For several years, penicillin remained mostly a laboratory curiosity. Still, Fleming shared his results, hoping others could improve the process.

In the late nineteen thirties, two researchers, Howard Florey and Ernst Chain, began studying penicillin seriously. They developed better ways to purify it and test it safely. During World War Two, governments supported large factories to produce penicillin. Doctors used it to treat infected wounds and deadly illnesses.

Penicillin changed medicine because it made many infections treatable. It also inspired scientists to search for more antibiotics. However, doctors later learned that overuse can make bacteria resistant. Today, penicillin remains important, and it reminds people to use antibiotics wisely.

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A group of students studied why some ponds stay clear while others turn green. They learned that algae can grow quickly when extra nutrients enter the water. Nutrients can come from lawn fertilizer, pet waste, or soil washed in by rain.

The students visited two ponds near their town. One pond had many plants along the shore. These plants slowed runoff and trapped soil. The second pond had bare banks, where rain carried dirt straight into the water.

In their classroom, the students built small models using clear containers. They added soil and water, then poured in colored water to represent runoff. The container with “shore plants” stayed clearer. The other turned cloudy and green.

The students shared their results with local leaders. They suggested planting grasses and shrubs near pond edges. They also suggested using less fertilizer. Their work showed that small land choices can protect water quality.

Read the passage, then answer: Which choice best captures the overall message of the text?

A town wanted to reduce traffic near its middle school. Parents often drove short distances, creating long lines. The town council proposed a “walking school bus.” In this plan, an adult volunteer walks a set route, picking up students at corners.

At first, some families worried about safety and timing. The council responded by adding bright vests and clear schedules. Volunteers received training, and students practiced crossing streets. The route also included a stop near a small park.

After a month, fewer cars crowded the school entrance. Students arrived more alert, and some made new friends on the walk. Parents reported that mornings felt less stressful. The town also noticed slightly cleaner air near the school.

The project succeeded because many people cooperated. It showed that community solutions can improve daily life. It also proved that small changes can create several benefits at once.

Read the passage, then answer: Which choice best captures the overall message of the text?

A class planted two small gardens behind the school. The first garden used only chemical fertilizer. The second garden used compost made from food scraps. Students measured plant height each week and wrote notes about leaf color.

At first, both gardens grew quickly. After several weeks, the compost garden soil stayed darker and held water longer. Earthworms appeared there, and the soil felt loose. In the fertilizer garden, the soil became hard and dry after hot days.

When harvest time arrived, both gardens produced vegetables. However, the compost garden produced slightly more. Students also noticed fewer weeds because they covered the soil with dried leaves. They learned that healthy soil depends on more than one ingredient.

The class concluded that composting can reduce waste and support strong gardens. They also understood that careful observation makes science more reliable. Their project turned lunch leftovers into something useful.

Read the passage, then answer: Which choice best captures the overall message of the text?

In Japan, many families celebrate the arrival of spring by viewing cherry blossoms. People visit parks, spread blankets, and share snacks beneath pink branches. The event is calm and thoughtful. Many people take photos, but they also pause to notice how quickly petals fall.

In Mexico, families often celebrate with a lively festival called a fiesta. Music fills streets, and neighbors dance together. Food stands sell warm treats, and children play games. The mood is energetic, and the celebration can last late into the night.

These traditions differ in style, yet they share important ideas. Both bring people together outside their daily routines. Both use food and shared spaces to strengthen friendships. Each also reminds people to appreciate the present moment, whether quietly or loudly.

Learning about different celebrations can help students respect other communities. It can also help them notice what matters in their own traditions. Even when customs look different, they can serve similar human needs.

Read the passage, then answer: Which option provides the most accurate summary?

In a short story, a girl named Anya finds an old camera at a yard sale. The seller says it is broken, but Anya buys it anyway. She likes the heavy metal body and the worn leather strap. At home, she cleans it and places it on her shelf.

Days later, Anya notices something strange. When she looks through the camera’s viewfinder, she sees the room as it was years ago. She sees a different rug and a window curtain that no longer exists. The camera does not change the present, but it shows a hidden past.

Anya begins visiting familiar places with the camera. She views her school hallway with older lockers. She views the park with smaller trees. Each time, she feels more connected to the people who came before her.

In the final scene, Anya returns the camera to the yard sale table. She leaves a note for the next buyer. It says that history is not far away. It is all around us, waiting to be noticed.

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In nineteen fifty-seven, the Soviet Union launched Sputnik, the first artificial satellite. It was a small metal sphere that circled Earth. People around the world listened to its radio signal. Many were amazed, but some were worried about what the new technology meant.

In the United States, Sputnik led to major changes in education and research. Leaders wanted stronger science and math programs. New funding supported laboratories and scholarships. Students were encouraged to study engineering and space science.

Sputnik also helped begin the Space Race. Both the Soviet Union and the United States worked to send humans into space. This competition produced new rockets, better communication tools, and improved weather satellites. Some inventions later helped everyday life.

Although Sputnik was simple, its impact was large. It showed that space was reachable. It also pushed countries to invest in learning and innovation.

Read the passage, then answer: Which sentence best summarizes the passage?

In the early days of flight, pilots faced many unknowns. Weather forecasts were limited, and planes were less reliable. A pilot named Bessie Coleman wanted to fly despite these barriers. She also faced unfair rules that kept many people out of flight schools.

Coleman saved money and searched for training. When she could not find a school that accepted her, she traveled to France. There, she earned a pilot’s license in nineteen twenty-one. She returned to the United States and performed in air shows.

Coleman used her fame to encourage others. She spoke about the importance of equal chances. She also planned to open a flight school for new pilots. Although she died young, her courage inspired later aviators.

Her story shows how determination can overcome obstacles. It also shows how one person’s success can open doors for others.

Which sentence best summarizes this passage?