Metric Units

Metric Units is a what scientists in America measure everything in. They don't use inches they use centimeters, meter, kilo, etc. Things seen now a days that are measures in metric units are,
One: A bottle of tonic is measured in Liters, well a big bottle would be 2 liters.
Two: A can of Tonic is 12 ounces is equal is 0.345 liters.
Three: A gallon of milk is obviously equal to a gallon but in liters is equal to 3.785 liters.
The reason for metric units, I think that when you use the metric system you can get a more accurate measurement than using units like inches and yards.

Estimated Distance

Estimated distance is not using the exact tools you need to measure a distance. So you have a vague idea of the distance. Estimated the front of my house is about 25 feet. Many people look at estimated distance as just looking with your eye and judging by what you see you can have an idea about how big it is.

Distracted Driving

Distracted driving is a very bad situation to be in when your the driver, a passenger, or you don't even have to be in car. One minute you could be in a car and the next you could be in the hospital or even worse the ground. If you are texting or talking on the phone or whatever you might being doing that might cause you to not be paying attention to what you should be doing you can think that you practically already have a foot the grave. Evidence shows that more then 500,000 people in 2013-2014 have been killed or injured by distracted drivers. I haven't been in a car with someone but once I did she a man, he was in the lane next to me and my grandmother and he had to be going 75 on the highway, in the rain, he was also texting and one second he was on the road and the next he wasn't he went right into the woods. It was a horrible sight to see. When me and my grandmother where driving he just whizzed right past us and I could tell he wasn't watching a thing he was doing. It was one of the most frightening things I had ever seen in my life. But I felt as though he could of stopped but he didn't. WHY? What people do now a days no one could ever figure out what could be going through the persons mind.
This is something to be very aware of while driving even if your not in the car with the person that is distracted you still have to be aware of your surroundings

Reaction Time

Reaction time is when you could be doing anything and how long it will take you react to the situation you are in.
Three different ways we can react in everyday life is,
one: a death. Some people quickly react to this but some need time to understand what is happening.
Same thing with,
two: a child birth. Some mothers and fathers may react different or even friends or family.
Number three would be a marriage many people have many different reactions to a wedding or a proposal. Especially if the person is a very known person. Like a celebrity.