Lesson 10: Security technology

B. Reread your text more carefully and write T (true) or F (false).

1. Police departments don’t use radar guns anymore. (False)
2. Radar guns can only calculate the speed of a car moving towards them. (False)
3. Some radar guns are shaped a bit like guns. (True)
4. A radar detector makes a beeping noise if it senses a radar being used in the area. (True)
5. There are main problems with radar detectors. (True)
6. Some people think radar guns don’t work well. (True)
7. Police must be trained to use the radar gun correctly. (True)
8. Radar guns don’t need any maintenance. (False)

Answer the following using the information from your textbook.

1. What is a radar detector?

Radar detector is a machine that detects radar guns.

2. How does the radar speed gun work?

A radar speed gun works by sending radio waves towards a car. When the waves hit the car, they bounce back towards the radar gun.

3. Radar guns don’t need any maintenance. (True/False)

4. Radar speed guns can be maintained if they are check and fixed regularly. (True/False)

5. Police departments don’t use radar guns anymore. (True/False)

6. Police must be trained to use the radar gun correctly. (True/False)

7. Radar guns work by sending radio waves towards a car.

8. Police officers started using radar speed guns to catch speeders over 50 years ago.

9. The radar was invented during the World War II to detect enemy aircraft and ships.

10. Some people think radar guns don’t work well. (True/False)

11. Why do police officers use radar speed guns?

Police officers use radar speed guns to catch speeders.

12. There are two main problems with radar detectors. (True/False)

13. How can drivers avoid radar speed gun?

They use radar detectors that detect if a radar gun is being used nearby.

14. Radar guns can only calculate the speed of a car moving towards them. (True/False)

15. Some radar guns are shaped a bit like guns. (True/False)