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An engineer.
speed up chemical reaction because of the lowered activation energy
johnsons baby lube, trust me it works
An enzyme that works under extreme conditions like high temperatures.
Epidemiologist
Fibrous.
any kind,
There are many kinds of inclined planes. Some examples are: driveways, slide, and a ramp. There are many kinds of inclined planes. Some examples are: driveways, slide, and a ramp.
sand and gravel
Gravel
Tar or gravel
Gravel
sedimentary rock
The answer is Mineral
It is going to be on the expensive side relative to gravel, sand or caliche (I'm in Texas), but crushed concrete will lock together once it is in place and driven on a few times. Absolutely won't go anywhere and will hold a "crown." It will be cheaper if the highway department has a big project going on nearby.
Gravel
Do not use gravel in a turtle tank. They will eat it and it can cause serious problemlems - even death. If you do want to use gravel it must be very large gravel so that they cannot eat it but you may also just have a bare bottom - it is easier to clean also.