Using the Best Unit
The following questions ask you to select the unit of time that would most likely be used to describe the given event. Click on the best answer.

• a basketball game
  seconds, hours, or minutes.

• heating a muffin in the microwave
  seconds, hours, or milliseconds.

• building a house
  days, weeks, or months.

• the blink of an eye
  seconds, milliseconds, or minutes.

Converting Units
Use the table of conversions to answer the following questions.

• How many seconds are there in one day?
  86,400, 14,400, or 1,440.

• Are there more months in a year or years in a decade?
  months in a year, years in a decade, or the two are equal.

• Which of the following is equal to 3 weeks?
  48 hours, 1 month, or 21 days.

Word Problems

• Emily has a tennis lesson at 3:30 on Tuesdays. Would her lesson most likely take place in the a.m. or p.m. hour?
  a.m., or p.m.

• Midnight is considered 12 o'clock:
  a.m., or p.m.

• Which one represents the greater amount of time?
  10 hours, or 1 school day

• Julie wants to take a bus to a baseball game. The first bus leaves at 12:15, and the second bus leaves at 2:15. How much time is there between the two departure times?
  3 hours, 1 1/2 hours, or 2 hours

• Joe finished painting at 1:00 p.m. It takes 15 minutes to dry. At what time will Joe's picture be dry?
  1:15 a.m., 12:45 p.m., or 1:15 p.m.