To play online press the screenshot above and then the start button.

# Interactive Time Comparison. Which of the 11 objects is older?

 "Time Comparison" is a small knowledge level game to sort the objects by their correct value in order of time magnitude. Physics exercise to explore and study the time span of different objects from youngest to oldest. Fun educational game, suitable for online lessons and interactive classes. Free online game for physics homework. Online physics educational game. Fun physics puzzle.

This physics class game include the following objects:
• Mean lifetime of a bottom quark - 1 picosecond
• Time to execute one machine cycle by a 1 GHz microprocessor - 1 nanosecond
• Time between a fruit fly beats its wings - 4 milliseconds
• The world record of 100 metres sprint - 9.58 seconds
• The time to boil an egg - 5 minutes
• One rotation of Earth around its axis - 1 day
• The time of normal pregnancy - 9 months
• One rotation of Earth around the Sun - 1 year
• Mean livespan of the oldest tree - 50 centuries
• The time ago the dinosaur extinction - 65 ages
• Age of the Earth - 4.5 eons

## How to play Time Comparison Puzzle.

 There are 11 round pictures of objectas with different timespan, which will appear randomly on the game screen. Drag and drop them in the correct slots according to their approximate time duration value, situated at the bottom of the screen. Sort all 11 objects to win the game.
Knowledge Achievements:
Know different time units and get +1 Knowledge Level.
Difficulty: Medium.

### Class subject: Time.

 Time is the never-ending continued progress of existence and events. It happens in an apparently irreversible way from the past, through the present and to the future. To measure time, we can use anything that repeats itself regularly. One example is the start of a new day (as Earth rotates on its axis). Two more are the phases of the moon (as it orbits the Earth), and the seasons of the year (as the Earth orbits the Sun).

This fun physics game may answer the following questions:
• Which takes more time?
• Which takes less time?
• What is the time difference of objects?
• Which of the objects are older?
• Which of the objects are younger?