A clock is a device that measures and shows time, often on a wall or surface.

The idea

Say the clock says nine for its display. If it is five minutes fast, it shows a time five minutes later than the correct time.

Examples

  • The clock is on the wall.
  • The kitchen clock says nine.
  • This clock is five minutes fast.
  • She set the clock to the correct time.
  • There are two clocks in the room.
  • The alarm clock rang at six.

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Watch out

A clock showing a particular time may be wrong; its display alone does not guarantee the actual time.

Try it yourself

  1. Interpret a fast clock. The correct time is 9:00; the clock is five minutes fast. What does it show? (9:05 / 8:55)

    Show answer or example answer

    9:05

    A clock five minutes fast shows a later time than the correct time.

  2. Choose the device word. The device on the wall that shows time is a ___. (clock / hour)

    Show answer or example answer

    clock

    Clock names the device that displays the time.

  3. Decide what a display proves. A clock says nine. Does that alone prove the actual time is nine? (no / yes)

    Show answer or example answer

    no

    A display does not prove the clock is correct.

Use it today

Describe a clock and say what it shows, including any known difference from the correct time.