AM and PM

Lesson

Practice

Lesson

You may already know that there are $24$24 hours in a day but clocks only go to $12$12. Why? Well, for one thing, we would need a very big clock to fit $24$24 numbers around it! People also worked out a long time ago that they could split the days into two lots of $12$12 hours and just make note of whether it was morning or afternoon. Let's learn more about this now.

Remember!

AM means "before midday" and PM means "after midday."

Examples

question 1

Choose whether these activities normally happen in the AM or PM.

Going to bed.
AM
A
PM
B
Eating breakfast.
AM
A
PM
B
Watching the sun rise.
AM
A
PM
B

question 2

$James$ went to a movie at $11:50$11:50 am. The movie went for $1$1 hour and $10$10 minutes.

Would the movie finish in the am or pm?
am
A
pm
B
Complete the statement:

The movie finishes at $\editable{}$$:$:$\editable{}$$\editable{}$ pm.

question 3

$Valentina$ starts work at $7$7 am and finishes work at $5:30$5:30 in the evening.

Complete the statement:

$Valentina$ is at work for $\editable{}$ hours and $\editable{}$ minutes.

How about some LATIN!

The abbreviation AM, comes from the latin "ante meridiem" which means before midday and the abbreviation PM comes from the latin "post merideim", meaning after midday.

Outcomes

4.M1.04

Estimate and determine elapsed time, with and without using a time line, given the durations of events expressed in five-minute intervals, hours, days, weeks, months, or years