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