REVIEW WHAT YOU'VE LEARNED

Multiple Choice:
Please select the letter of the most correct answer.

1) Organic debris is?

     a) An alternative rock band from Seattle Washington.

     b) material that came from living things.

     c) A rock deposit in a cave.

2) Molds and bacteria are.

    a) The bodily wastes of bats and crickets.

    b) The secret ingredient of most snack cakes.

    c) A simple form of life.

3) Carbonic acid is?

   a) The type of rock that most caves are found in.

   b) A weak acid in ground water that over time can create caves.

   c) The lead singer from the Organic Debris.

4) Fossils are?

   a) A common name for parents.

   b) Tennis shoes designed for very old basket ball players

   c) The evidence of past life.

5) Columns are?

   a) A simple plant found in caves.

   b) A cave deposit formed when a stalactite and a stalagmite grow           together.

   c) An acid found in vinegar.

Fill in the Blank:
Take words from the word list below and fill in the blanks in the paragraph about caves.

---------- are scientists who study how the Earth was formed.  They think that ----- are made when the carbonic acid in ground water carved out tunnels and passage ways in --------- rock thousands of years ago.  ---- -------- are formed when ground water going through limestone layers dissolves out calcium carbonate and deposits ------- crystals inside the cave.  Some of the cave deposits are white, but others get their different colors from ---- --- --------- ---- --- ----.