minerals
rocks
obsidian
facts
true or false
100
a mineral
is obsidain a rock or a mineral.
100
sedimentary
Wich of these rocks is found at the bottom of rivers and lakes sedimentary igneoues or metimorphic
100
to make glass.
What can obsiadian be used for.
100
you will alaways be able to throw it
What is 1 fact about obsidian.
100
true.
obsidian is a mineral.
200
something that makes up rocks
What is a mineral
200
because there was once land there
why are rocks found in the ocean
200
small
is obsidian a small rock or huge rock
200
true.
obsidian is black.
300
they make up rocks
What do minerals do
300
because minerals make themup
Why are rocks hard
300
because most of it gets burnt up
why is obsidian small
300
yes
is obsidian interesting
300
false.
obsidian is a huge rock.
400
in the earth
Where are minerals found
400
a mineral that is formed at volcanoes or close to volcanoes
What is obsiadiaan
400
false
obsidian is a ruff mineral
500
because certain ones are hard to find.
Why are minerals valuable
500
when lava cools very quickly
how is obsidian formed
500
because volcanoes do not erupt alot.
why is obsidian hard to find.
500
it will alaways be smooth
What is a fact about obsidian
500
true
obsidian is a small mineral
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