Timelines

Learning Objectives Identify the key parts of a timeline, including the start time, end time, and intervals. Place events on a timeline in correct chronological order. Calculate the elapsed time between two points on a timeline using addition or subtraction. Determine a start time or an end time when given the elapsed time and one of the other points. Solve one-step word problems involving time intervals by drawing and using a timeline. Read and interpret timelines with intervals of 1, 5, 10, 15, and 30 minutes. Have you ever planned a super fun day, from playing at the park to eating pizza for dinner? 🍕 A timeline is like a map for your day! In this lesson, we will learn how to use timelines to see how time passes. Timelines help us organize events and figure out how long...

TermDefinitionExample TimelineA line that shows events in the order they happened. It looks like a number line, but for time.A line showing your school day starting at 8:00 AM, with marks for recess at 10:15 AM and lunch at 12:00 PM. EventSomething specific that happens at a certain time.Your birthday party starting at 2:00 PM is an event. IntervalThe amount of time between the marks on a timeline.A timeline might have marks every 5 minutes. The interval is 5 minutes. Elapsed TimeThe total amount of time that passes from a start time to an end time. It's how long something lasts.If you play outside from 4:00 PM to 4:30 PM, the elapsed time is 30 minutes. Start TimeThe time when an event begins.Math class begins at 9:00 AM. This is the start time. End TimeThe time when an event finish...

Finding Elapsed Time End Time - Start Time = Elapsed Time To find out how long an activity took, subtract the start time from the end time. You can do this by counting forward on a timeline from the start to the end. Finding the End Time Start Time + Elapsed Time = End Time If you know when an activity starts and how long it will last, you can find the end time. You do this by starting at the start time and jumping forward on the timeline. Finding the Start Time End Time - Elapsed Time = Start Time If you know when an activity ends and how long it was, you can find when it started. You do this by starting at the end time and jumping backward on the timeline.