Seconds, months, and leap years

Mathematics · Measurement · ages 7-8

Name ______________________ Date ____________

True or false? One minute equals 60 seconds.
Circle one: True False
How many seconds are in 1 minute?
- 6
- 60
- 100
- 600
How many seconds are in one minute?
- 50
- 60
- 100
A leap year has 366 days.
Circle one: True False
How often does a leap year happen?
- Every year
- Every 4 years
- Every 10 years
A timer runs for 72 seconds. How many hours is that? Give your answer as a decimal.
Answer: ______________
A song lasts 4800 seconds. How many minutes is that?
Answer: ______________
Which of these months has 30 days?
- April
- January
- March
Ben says, 'Every month has exactly 30 days.' What is wrong with what Ben said?
- Months only have 28 days
- Nothing, he is right
- Some months have 31 days, and February has 28 or 29
A movie is 4 hours long. How many seconds is that?
Answer: ______________

Answer key

For grown-ups. Fold this page away before handing over the rest.

True · This is the basic rule for turning minutes into seconds.
60 · A minute is always made of 60 seconds. That is the rule we use whenever we work with time.
60 · A minute always has 60 seconds. Try counting slowly and you will feel how long that is.
True · Every four years, February gets one extra day, so the whole year adds up to 366 days.
Every 4 years · Every four years, one extra day is added to February, making that year a leap year.
0.02 · There are 3600 seconds in an hour, so small numbers of seconds make tiny decimal hours.
80 · Dividing seconds by 60 tells you how many minutes you have.
April · April has 30 days. January and March each have 31 days.
Some months have 31 days, and February has 28 or 29 · Months are not all the same length. Some have 31 days, and February is shorter still.
14400 · You can go from hours to seconds by passing through minutes first.