Environmental change Flashcards
1
Q
why study past
A
how earth responds to climate change
2
Q
what happened in quaternary period
A
greenhouse gases similar to today, currents similar to today, climate similar but then got cold
3
Q
what was quaternary period characterised by
A
ice age
4
Q
identifying ice ages in past
A
sediments, moraines, drumlins, pingos
5
Q
why did ice age happen
A
change of shape of earths orbit due to gravity of sun/moon/jupiter
6
Q
milankovitch cycle
A
3 things, eccentricity, change in tilt, wobble
7
Q
issue with milankovitch
A
predictions didnt match with records
8
Q
what can validate Milankovitch
A
deep oceans as less erosion
9
Q
forminifera
A
made from surrounding water so can tell about past
