Measuring & Organizing Time

A decade is a period of how many years?

• ten

  ( 10 )

• one hundred

  ( 100 )

• one thousand

  ( 1,000 )

A century is a time period of how many years?

• ten

  ( 10 )

• one hundred

  ( 100 )

• one thousand

  ( 1,000 )

A system for organizing time into

days, weeks, and months.

• calendar

• time line

• clock

A calendar based on the 

revolution of Earth around the Sun.

• solar

  calendar

• lunar

  calendar

• Julian

  calendar

A calendar based on the 

phases of the moon.

• solar

  calendar

• lunar

  calendar

• system

  calendar

Means

" Before Common Era "

• B.C.E.

• C.E.

• A.D.

Means Common Era.

Refers to events that happened after BCE.

• C.E.

• B.C.E.

• B.C.

Means Before Common Era.

Events before CE.

• B.C.E.

• A.D.

• C.E.

Definiton:

The order in which events happen.

• chronology

• B.C.E.

• calendar

A diagram that shows the 

order of events.

• calendar

• time line

• year