Math: Elementary School: 1st and 2nd Grade Quiz - Units of Time - Comparing and Sequencing Intervals of Time (Questions)

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Understanding units of time well includes an ability to compare them and to understand how some intervals of time are longer than others. Comparing intervals also requires a firm understanding of the number of minutes in an hour (or half an hour) and the number of hours in a day.

Try this quiz to see how well you do with units of time.

1. How many minutes are there in one hour?
 [ ] 1 [ ] 30 [ ] 50 [ ] 60
2. How many hours are there in a day?
 [ ] 24 [ ] 12 [ ] 10 [ ] 30
3. How many minutes are there in half an hour?
 [ ] 60 [ ] 30 [ ] 15 [ ] 10
4. Which is the longest unit of time:
 [ ] 3 hours [ ] 3 minutes [ ] 3 seconds [ ] 30 minutes
5. Which is the shortest unit of time?
 [ ] 5 hours [ ] 5 minutes [ ] 5 seconds [ ] 5 days
6. One and a half hours is the same as...
 [ ] 30 minutes [ ] 90 minutes [ ] 60 minutes [ ] 120 minutes
7. Put these times in order, from shortest to longest:
15 minutes, 5 minutes, 15 hours, 15 seconds
 [ ] 15 seconds, 5 minutes, 15 minutes, 15 hours [ ] 15 minutes, 15 hours, 5 minutes, 15 seconds [ ] 15 hours, 15 minutes, 5 minutes, 15 seconds [ ] 5 minutes, 15 minutes, 15 hours, 15 seconds
8. Put these times in order, from longest to shortest:
30 minutes, 3 days, 30 hours, 30 seconds
 [ ] 30 seconds, 30 minutes, 30 hours, 3 days [ ] 30 hours, 3 days, 30 minutes, 30 seconds [ ] 3 days, 30 hours, 30 minutes, 30 seconds [ ] 30 minutes, 30 hours, 3 days, 30 seconds
9. How long should it take to brush your teeth?
 [ ] 3 seconds [ ] 3 hours [ ] 30 minutes [ ] 3 minutes
10. How long should it take to write a letter to a friend?
 [ ] 30 hours [ ] 30 minutes [ ] 30 seconds [ ] 3 days
Math: Elementary School: 1st and 2nd Grade Quiz - Units of Time - Comparing and Sequencing Intervals of Time (Answers)
1. How many minutes are there in one hour?
 [ ] 1 [ ] 30 [ ] 50 [x] 60
It takes the minute hand 60 minutes to get all the way around the clock
2. How many hours are there in a day?
 [x] 24 [ ] 12 [ ] 10 [ ] 30
From 12 midnight one day, to 12 midnight the next, it takes 24 hours in total
3. How many minutes are there in half an hour?
 [ ] 60 [x] 30 [ ] 15 [ ] 10
Half of 60 is 30
4. Which is the longest unit of time:
 [x] 3 hours [ ] 3 minutes [ ] 3 seconds [ ] 30 minutes
3 hours is the same as 180 minutes
5. Which is the shortest unit of time?
 [ ] 5 hours [ ] 5 minutes [x] 5 seconds [ ] 5 days
5 seconds lasts about as long as it takes to count up to 5
6. One and a half hours is the same as...
 [ ] 30 minutes [x] 90 minutes [ ] 60 minutes [ ] 120 minutes
1 hour is 60 minutes and half an hour is 30 minutes. Added together, this makes 90 minutes
7. Put these times in order, from shortest to longest:
15 minutes, 5 minutes, 15 hours, 15 seconds
 [x] 15 seconds, 5 minutes, 15 minutes, 15 hours [ ] 15 minutes, 15 hours, 5 minutes, 15 seconds [ ] 15 hours, 15 minutes, 5 minutes, 15 seconds [ ] 5 minutes, 15 minutes, 15 hours, 15 seconds
15 seconds is a very short amount of time, 15 hours is more than half a full day!
8. Put these times in order, from longest to shortest:
30 minutes, 3 days, 30 hours, 30 seconds
 [ ] 30 seconds, 30 minutes, 30 hours, 3 days [ ] 30 hours, 3 days, 30 minutes, 30 seconds [x] 3 days, 30 hours, 30 minutes, 30 seconds [ ] 30 minutes, 30 hours, 3 days, 30 seconds
3 days is the same as 72 hours!
9. How long should it take to brush your teeth?
 [ ] 3 seconds [ ] 3 hours [ ] 30 minutes [x] 3 minutes
3 minutes is the amount of time the dentist usually recommends
10. How long should it take to write a letter to a friend?
 [ ] 30 hours [x] 30 minutes [ ] 30 seconds [ ] 3 days
You could write a good letter in about half an hour