There are about 800,000 police officers in the United States. Police officers protect the lives and property of citizens. They maintain order, catch lawbreakers, and work to prevent crimes. Also called “peace offers,” police officers have different responsibilities depending upon the size and structure of the communities in which they serve. Police officers may patrol the streets on foot or in squad cars, control traffic, or work as detectives investigating crimes. At the police station, officers may be assigned to work in the crime laboratory or the records department. All officers file reports of incidents, and many testify at trials and hearings.
- What type of people help make a community operate well?
- What is head lice?
- What do I do if witness bullying on the playground?
- Should I tell my parents I am being bullied?
- What are antibiotics?
- What causes people to pass gas?
- How does an electric car work?
- What were some of the earliest steam and gasoline driven vehicles?
- Who invented the automobile?
- How does a cable car stop and go?
- How does an escalator work?
- Why are they called skyscrapers?
- How do elevators work?
- What is the tallest building in the world?
- How is steel used in skyscrapers?
- What is the Nobel Prize?
- Why are there different religions and how did they spread?
- What was the Industrial Revolution?
- What is a patent?
- What is the difference between an invention and a discovery?


