1) .............. are deep valleys with steep walls a) canyons b) plateaus c) plains 2) .......... are raised parts that are flat on top a) plateaus b) valleys c) plains 3) low land between mountains and hills a) plains b) plateaus c) valleys 4) canyons have rounded walls a) true b) false 5) canyon is formed in short time a) true b) false 6) canyons are formed by ........... a) rivers b) wind 7) landforms in ocean floor are ................... than on land a) bigger b) smaller 8) .................... base in ocean so it is tallest mountain a) Mauna Kea b) Mount Everset 9) Challenge deep is ................... canyon a) shortest b) deepest

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