1. Which was not one of the problems with the first metal detectors? a. They were too big. b. They were too expensive. c. They didn't work well. d. They were unsafe. 2. Which best describes the main idea of the second paragraph?
a. It describes the sounds of a metal detector. b. It explains how metal detectors work. c. It warns about the effects of metal detectors. d. It explains how magnetic waves move. 3. How do metal detectors make clothing safer? a. Metal detectors make sure factory machines are working the right way. b. Metal detectors make sure workers don't bring weapons into factories. c. Metal detectors make sure that broken needles don't get into clothing. d. Metal detectors help people recover lost clothing at the beach. 4. Why were metal detectors first used? a. To help miners b. To help security guards c. To help doctors d. To help soldiers. 5. According to the text, metal detectors have been used in all of the following except which?
a. schools b. churches c. courthouses d. airports. 6. How do metal detectors help soldiers? a. They warn soldiers when bullets are coming. b. They help soldiers find hidden bombs. c. They find weaknesses in their armor. d. They create a relaxing beeping noise. 7. Why do people bring metal detectors to the beach? a. Metal detectors help people keep the sand clean and safe b. Metal detectors look cool c. Metal detectors help people find valuable items. 8. Which happened first? a. The metal detector beeps alarmingly b. The magnetic waves hit metal and change c. The Magnetic waves go through the ground d. The Metal detector creates magnetic waves. 9. How did metal detectors get better over time? a. they became cheaper b. they began working better c. they became lighter d. All of these. 10. Which title would best describe the purpose of this text? a. day at the beach: Using your metal detector to find things b. Metal detectors: a Complete the story of their invention c. Magnetism and More: How a metal detector works d. Metal detectors: What they do and How we use them.
