erosion
canyon
This is the _________ of the moon.
surface
How does sand get to the beach? Where does it come from?
Rocks are carried from the mountain to the beach by the river. Rocks crash against each other and become sand.
Why does beach sand have different colors?
Beach sand gets its color from rocks in the mountains
a river _______ downstream.
flows
What is at the bottom of a canyon?
a river is at the bottom of a canyon.
Something that is very small is called _________ .
tiny
something that is not normal.
strange
Where does a river start?
in the mountains
Where does a river end?
The ocean
