Coal was formed about 300 million years ago during a period of time called the ____ period.

Coal was formed about 300 million years ago during a period of time called the ____ period.
 
  A) Monolithic
  B) Crustation
  C) Carboniferous
  D) none of these

Question 2

The outside of the hedgehog's spine is solid; the inside is filled with soft ____________________ pockets.
 
  Fill in the blank(s) with correct word

Question 3

With additional pressure and time, subbituminous coal transforms into ____ coal.
 
  A) anthracite
  B) subbituminous
  C) lignite
  D) bituminous

Question 4

The hedgehog's spines are modified hairs made of ____________________.
 
  Fill in the blank(s) with correct word

Question 5

As the rock and soil above the lignite increases, the high pressures cause the coal to become harder. This step in coal formation is ____ coal.
 
  A) lignite
  B) subbituminous
  C) anthracite
  D) bituminous

Question 6

How often should fresh bedding be provided for a hedgehog?
 
  A) daily
  B) every 2-3 days
  C) at least once a week
  D) twice a month