What are those big dense ice things called, then ones that are always moving?
it called glacier
Are those only around the poles?
no
Where else are they?
some are in Himalayas
Are those the only other place?
no
Are the other places also mountains?
yes
What are a couple of them?
some in East Africa, Mexico, New Guinea and Zard Kuh
How much of the world's land do they cover?
about 10 percent
How are they even formed?
when the snow exceeds its ablation
What's that?
it called melting and sublimation
How long does this take?
often centuries
Are they in the sea?
no