DATING THE EARTH

Title & Description	English	More Ideas and Videos
Dating the Earth – before the discovery of radioactivity Charles Lyell and Mount Etna, 1828	Dating the Earth - Charles Lyell and Mount Etna 1828
Dating the Earth – But how old is it? Investigating radioactive dating of rocks and minerals	Radioactive dating	Video
Working out the age of the Earth - moving backwards as time moved forwards Link up your own timeline of how scientists worked out the age of the Earth	Age of the Earth

STRATIGRAPHY & SEQUENCES

Title & Description	English	More Ideas and Videos
Filling the gap – picturing the unconformity ‘abyss of time’? Working out what happened during unconformity time gaps	Filling the gap
Laying down the principles Sequencing the events that form rocks through applying stratigraphic principles	Laying down the principles	Teaching video
Walther’s law of sedimentation – teaching it the LegoTM way, Part 1 (ELI+) How does a relative rise in sea level affect a vertical sequence of sediments?	Walther’s law of sedimentation, part 1 (ELI+)
Walther’s law of sedimentation – teaching it the LegoTM way, Part 2: (ELI+) How does a relative fall in sea level affect a vertical sequence of sediments?	Walther’s law of sedimentation, part 2 (ELI+)
What happened when?: sorting out sequences using stratigraphical concepts Are the age-based stratigraphical concepts principles or laws? – and how do you use them?	What happened when?
What might be the marker for the ‘golden spike’ at the end of the Anthropocene? (ELI+) How is geological time subdivided and what are likely future human impacts on the Earth?	Geological time and the Anthropocene?
Where shall we drill for oil? Sorting out the sequence - oil prospect	Where shall we drill for oil?
What is the geological history? Sequencing events to reveal a history using simple stratigraphic principles	What is the geological history?	Extension

VISUALISING DEEP TIME

Title & Description	English	More Ideas and Videos
Back in time “Alligators spotted in London” @ELI_Earth - July 1 Retrieving and communicating information	Back in time
Counting to one million? Trying to imagine the enormity of geological time	Counting to one million?
How many for a million? How many sheets of graph paper for 1 million, or 100 million, or 1000 million squares?	How many for a million?
How long does it take? Sorting out Earth events according to the time they take	How long does it take?
‘Looking so far into the Abyss of Time’ How to visualise the immensity of geological time...with a rope!	Geological time with a rope
Origin of the Earth - at arm’s length The age of the Earth - with a good stretch of imagination	Age of the Earth - on a volunteer!
Rock is a time capsule – a message from the past Bringing to life the extraordinary stories of ordinary rocks	Rock is a time capsule
Toilet roll of time Make a geological timeline to take home	Toilet roll of time