|
|
|
2
|
The history of rocks and minerals is the history of our ___.
|
|
5
|
The ancient ___ were expert masons or stone workers.
|
|
7
|
The minerals that ___ to form our planet are made of one or more elements.
|
|
8
|
Rocks are made of thousands of natural substances called ___.
|
|
11
|
Humans have used the rocks of the earth's crust for ___ of years.
|
|
13
|
Too much of our earth is coverd in ___.
|
|
15
|
Like a sponge pumice is a foamy volcanic ___.
|
|
|
|
|
|
|
1
|
A mineral may be made of a single chemical ___.
|
|
3
|
Underneath the rocks of the eaths crust is the ___.
|
|
4
|
___ organize rocks based on how they were formed.
|
|
6
|
The rock ___ is driven mainly by heat.
|
|
9
|
Light ___ form the sky.
|
|
10
|
Nothing on earth last ___ no even solid rock.
|
|
12
|
On the earth's ___, rocks take a beating.
|
|
14
|
What is the third rockiest planet?
|
|
|
|
