CDT 1
Describe how glacial evidence supported the CDT
striations were found in warm climates
striations also suggested glaciers flowed from one single point on Pangea
Convection Currents
Formed from plants, often captures entire insects
Amber
Land that separated millions of years ago that begin to roughly form the northern & southern hemispheres
Laurasia & Gonwandaland
A law that determines younger rock layers will be more towards the surface of Earth while older rock layers will be buried deeper
Law of Superposition
List 2 continents (besides south america & africa) that fit together like puzzle pieces
europe and north america
australia and asia
africa and asia
A palm tree leaf fossil found in Antarctica supports _______________ evidence because the climate does not match the species
Fossil
All remains of this fossil deteriorate away besides a thin layer of carbon that remained in its body
Carbonization or carbon film
Marks left on the Earth from glaciers, indicating that they all came from one place during the split of Pangea
These types of fossils provide a relative age by comparing the rock strata they are found in, in many different places around the world
Index Fossils
Explain why the CDT was rejected by most scientists of the time
There was no evidence for how the plates actually moved
Pangea was a super-continent that began to break apart approximately ___________ years ago
175
When an organism dies and the cavity fills with minerals, maybe sand or clay
Cast
Fossils of the same unevolved species were found on separate continents that didn't also match the climates
Fossil evidence
List 3 words to describe sedimentary rocks
Pressed, Cemented, Cool conditions, Layers, Low temperature, pressure, same age, strata
Coal fields matching up in North America and Europe supports this type of evidence: ___________
Landforms and rock layers
True or false: If the same species of organisms lived in different areas of the world, they would expect to evolve differently
True
These types of fossils provide indirect evidence of life. For example: footprints, eggs, burrows dug
Trace fossils
A theory that explained how the plates moved, proposed by Harry Hess
Plate Tectonics Theory
The world's oldest known form of living things. Still can be found in some remote areas of the world today
Stromatolites
List the 3 qualifications for an item to be classified as a fossil
1. Must not be man-made
2. Must be pre-historic
3. Must be proof of a once living thing
If you live in Brazil today, it was likely that the land you live on that begin to form the southern hemisphere was called ___________
Gondwanaland
Organic material is typically rotted out and replaced by minerals, stones, or a similar substance
Petrification
The scientist that proposed the continental drift theory
Alfred Wegener
This type of dating can be found from comparing certain radioactive elements found left over in fossils
Absolute age