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100
an under water volcano
What is a seamount
100
having a good shower
how can you get rid of swimmers itch
100
to take out solids
why does water flow through screens
100
huge sheets of ice
what is a glacier
200
2400 km long
how long can a trench be
200
a microorganism living in water
What is a coliform
200
it kills bacteria
what does chlorine do in water
200
18000 years ago
when did the ice covering north america melt
300
are eroded volcanic islands
What is a guyot
300
effects plants and buildings
What does acid rain do
300
alum is added to the water
how are flogs made
300
2700 meters tall
how tall is the greenland glacier
400
Challenger deep
What is the worlds deepest point
400
you can get sick
what happens when you drink to much water with coliforms in it
500
200 km wide
how wide can a trench be
500
nitric and sulphuric acid
What acids are in acid rain