7 Good ldea!

Unit 7 VOCABULARY 1 1 Listen and read. Inventions are everywhere. Look around you. What inventions can you see? One of the first inventions was the wheel. More than five thousand years ago, it was difficult to move things. People had to push or pull them along the ground. That was a problem. Then someone found a solution—the wheel. It changed our lives. Electricity is not an invention. It always existed in nature—in lightning, for example. But scientists discovered it and worked out how to use it. Inventors used imagination and creativity to make new inventions such as electric lights. When batteries were invented, electricity became even more useful. Now we can’t imagine our lives without battery-powered inventions such as computers and cell phones. Some inventions were invented too soon—years before they became really useful. One example was the windshield wiper. On a snowy day in 1903, Mary Anderson was riding in a streetcar in New York. From time to time, the driver had to open his window to wipe the snow from his windshield by hand. Back at home, Mary Anderson drew her idea for a windshield wiper. She tried to sell her invention, but failed. People thought windshield wipers could distract drivers and cause accidents! Air travel is used by millions of people today. However, there’s some discussion about who flew first. The Wright brothers tried to fly many times. They finally succeeded in 1903. But others say Alberto Santos-Dumont flew first. Santos-Dumont had the world’s first public flight in 1906 outside of Paris. He flew his plane 220 meters (722 ft.). 2 Listen and repeat. an invention The windshield wiper was a useful invention. a problem I have a problem. My invention isn’t working. a solution Do you know a good solution? a wheel Wheels are the most famous invention. electricity Did you know that electricity is not an invention? useful Umbrellas are useful in the rain. a battery My cell phone needs a new battery. imagination My sister writes cools stories. She has a lot of imagination. creativity To invent things, you need creativity. an idea That was a good idea! invent Who invented electric lights? try What are you trying to do? fail I studied very hard, so I won’t fail. succeed The Wright brothers succeeded.

SONG 1 Listen, read, and sing. Inventions Creativity! Electricity! Creativity changes the world! Inventions solve problems. Problems that we used to have are gone! The wheel and the cell phone help to make our world go around! Inventions are useful, every day, in every way. Computers, cars, and airplanes help to make our world go around. Creativity! Electricity! Creativity changes the world! You used to have to walk to get from place to place. Years ago, you could only talk face to face. You could take only boats to get across the sea. Now, we fly across the sky. Inventions are the reason why. Creativity! Electricity! Creativity changes the world! Imagination and ideas can change the world, every day. Can you solve a problem? Can you help our world today? Creativity! Electricity! Creativity changes the world!

GRAMMAR 1 Used to for past habits People used to travel across the sea in boats. We didn’t use to have airplanes. Why did people use to read by candlelight？ They didn’t use to have electricity.

VOCABULARY 2 1 Listen and repeat. put Every morning I put my things in my backpack. turn The wheels turn. lift Lift your arms and shake your legs. move Don’t move. I’m taking a photo! use How do you use that toy? 1 Complete. Then listen and check your answers. The “hula hoop” is an old invention, but it’s very popular today. It’s fun and it’s good exercise! 1. How do you use a hula hoop? It’s easy. Follow these instructions. 2. Put the hula hoop on the ground. Stand in the middle. 3. Lift the hoop to your waist. 4. Move your waist in a circle. Don’t hold the hoop! 5. The hoop turns around and around. Can you feel it? 2 Listen and stick. Put the stickers in order. Then tell your partner how to use this toy. What are you holding? Is it a new toy? No. It’s old. It used to be very popular. It moves down the stairs by itself! Cool! Show me how to use it. It’s easy. You put the toy at the top of the stairs . . . like this. Does it go down the stairs now? No. You have to lift it at the back. Like this. Then it turns over and over. That’s cool! Let’s go and show the others. GRAMMAR 2 You for general statements You need to have creativity to invent things. You should always try again if you fail. What do you do with this invention? Do you play with it?

READING 1 Listen and read. YOUNG and Creative Did you know that a teenager had the first idea for a television? And a sixyear-old boy invented the toy truck? Kids and teens are great inventors because they have a lot of creativity and imagination. 2018: At the age of 19, Angad Daryani invented a solution to the problem of air pollution in cities. Growing up in Mumbai, India, he suffered from asthma caused by the polluted air. Air pollution is a big problem. Three million people die each year. Angad’s invention is an air pollution cleaning tower that is 6.1 meters (20 ft.) high. The tower sucks in air and takes out the particles of dust and carbon. The particles are collected and can even be reused. Angad’s dream is to build thousands of the towers and improve the quality of air in cities. 2013: Canadian high school student Ann Makosinski was 15 when she invented the “hollow flashlight.” The flashlight uses heat from the human body and changes it into light. It doesn’t need batteries. Ann thought of the idea when she heard about a friend who lived the Philippines. Her friend was doing badly in school. She needed to do her homework at night but there was no electrical light in her home. Ann’s flashlight isn’t expensive. Ann hopes it will help some of the 1.1 billion people in the world who still have no electricity in their homes. 1905: When Frank Epperson was eleven, he left a cup filled with soda and a stick in his yard. That night he forgot about it. It was a very cold night. When he went outside the next morning he found something amazing: a “Popsicle”! 1824: Louis Braille had an accident when he was three. The accident left him blind. At that time, it was hard for blind children to read. They had to touch raised letters. But it was easy to confuse a Q with an O, an R with a B, and so on. When he was fifteen, Louis invented an alphabet that used raised dots. The Braille alphabet was a big success!