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Ice ages
volcanic activity
earths position
continental movement
100
cold periods or Glacial episods
What is an ice age?
100
large volcanic eruptions
what type of volcanic eruptions release alot of gases and ash
100
short term changes in climate have been linked to changes the number of
What is sunspots
100
were countries always where they were
no
200
carved away landwhat did ice ages do?
carved away land
200
gasses and ash
scientists believe that radiation is blocked by what?
200
how many years ago where the continets put togather
225 million years ago
300
100,000 years agoHow long was the last ice age?
100,000 years ago
300
months or years
the gasses and ash from volcanic eruptions release can stay up in the atmosphere for how long?
300
what was the super continets name
What is pangea
400
How many ice ages have there been?
How many ice ages have there been?
400
gases and ash
what do scientists believe cool the earths surface
400
how do you spell greys last name
What is psarouthakis
500
When was the last ice age?
10,250
500
how do you spell ethan l's last name
lobbestael