1. An Introduction to Time
Social studies 9

2. The concept of time
Time: identifies a measurable period during which an action, process, or condition exists or continues to exist. It is described in terms of periods of time (e.g. – age, epoch, era, years) or in precise dates.
Time:
Is an abstract human concept.
Can mean all of the past, present, and future taken together, or it can refer to only part of that span.
Refers to a measurable period in which people, actions or conditions exist.
Is divided by humans to organize and coordinate our activities.
Has lead to man inventing tools to measure it (clocks, calendars, etc).
Can be used to describe an occasion.
Is a valuable tool or device used by man.
Is the fourth dimension in which objects exist (length, width, depth).
In summary, the concept of time is used to organize people’s lives and create a context in which humans exist.

3. More time Time plays a big role in our lives. Let’s discuss:
What are some of the uses of time?
What are some words used to describe time?
What are some phrases about time?

4. Man and Measuring time
Throughout history, man has devised many ways of keeping time. Examples: Sundial: A device for telling time of day by the shadow which sunlight produces on the instrument. Ropes: When burned, knots tied at regular intervals would measure time. Candles: The candles would have grooves carved into them and, when burned, each groove represented a specific amount of time.

5. Measuring time continued
Hourglass: It tells time by means of sand trickling through a narrow opening.
Water Clock: It measures time by allowing water to drip from one marked container into another.
Mechanical Clocks: They were invented in 1656.

6. Please Consider
If I told you to be here at 9:30 tomorrow morning, would you all understand the command?
What if I told you to be here tomorrow when Canada AM starts? Who would understand this command?
There are two major ways to describe time. The former is an example of absolute time and the latter is an example of relative time. Here are detailed definitions and a few more examples …

7. Describing time Absolutely
Absolute Time:
Is a precise measurement.
Can refer to specific events, dates or moments.
Uses numbers and is exact.
Examples:
Johnny Cash was born on February 26, 1932.
The power went out at 10:23 and 6 seconds.
The bank opens at 9:30.

8. Describing time relatively
Relative Time:
Is time measured in relation to other things.
Examples:
Johnny Cash was born during the Great Depression.
The power went out during the Simpsons.
The bank opens at the same time as the mall.

9. Absolute or relative time?
On a piece of paper write the numbers one to ten. Read the following statements. Place an “A” beside the number if its corresponding sentence is an example of Absolute Time or an “R” if the corresponding sentence is an example of Relative Time. Don’t worry. This is not for marks … yet.

10. Quiz time!!!
1. Twenty-one years after the First World War ended, the Second World war began.
Relative
2. World War II ended in 1945.
Absolute

11. Quiz Time!!! 3. My brother is two years older than I am. Relative
4. Rick Smith was born the day World War II began.
Relative

12. Quiz Time!!! 5. Columbus landed in America in 1492. Absolute
6. I’ll pick you up right after school.
Relative

13. Quiz Time!!! 7. The Great Depression began in 1929. Absolute
8. I have to be at the concert at 7:30 PM.
Absolute

14. Quiz Time!!! 9. Canada has been a nation for 145 years. Relative
10. I have a meeting at 6:30 PM on May 3rd, 2015.
Absolute

15. The End of time (For Now)
I hope you’ve had the time of your life!!!