a space inside an object usually used for a purpose
chamber
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chemicals (adj, chemically)
pieces of a whole
chunks
When objects come together quickly
collide
to be made up of
comprised
The part of the Earth we live on is the _______
crust
Oxygen is an ________
element
The ocean caused the land to _______
erode
a person who studies what the Earth is made of, especially the crust
geologist
a slow increase over time
gradual change (gradually)
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mass
_____
pressure
a perfectly round shape
sphere
