These are very thick masses of ice that cover large areas
Glaciers
Bodies of water totally surrounded by land are called...
Lakes
Waterfalls are mainly found in what stage?
Upper course
When underground water flows naturally to the surface, what is formed?
A spring
What % of all water on Earth is fresh water?
5%
Oceans are smaller than seas. True or False?
False
The land over which a river flows is a...
Riverbed
The mouth is where the river ends and meets the?
Sea
How many courses are there in a river?
3
These are flowing streams of fresh water
Rivers
In which course can we find meanders?
Middle course
The source is where the river...?
Starts
The area of land that is drained by a river and its tributaries is a...
River basin
The point at which two rivers meet is called?
confluence
A river that empties into a bigger river is called a ...
Tributary
The water flows more slowly during this stage
Lower course
When precipitation falls to the ground, it filters down into the ground through...
Porous rocks
The water in rivers is fresh water. True or false?
True
The water flows quickly and the river is smaller in the...
Upper course
The rocks that don't let water pass through are...
Impermeable rocks
This is a group of river basins that empty into the same sea
Drainage basin