Ice ages
volcanic activity
100
What is an ice age?
long periods or glacil episode
100
what type of volcanic eruptions release alot of gases and ash
large volcanic eruptions
200
what did ice ages do?
carved away land
200
scientists believe that radiation is blocked by what?
gasses and ash
300
How long was the last ice age?
100,000 years ago
300
the gasses and ash from volcanic eruptions release can stay up in the atmosphere for how long?
months or years
400
How many ice ages have there been?
5
400
what do scientists believe cool the earths surface
gases and ash
500
When was the last ice age?
10,500 years ago
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