The coal ladder

Exercise and reference answers

Missing parts

1. Answer

   finest

   Choices

   1. finest
   2. softest
   3. cheapest

2. Answer

   low

   Choices

   1. low
   2. high
   3. top

3. Answer

   swamp

   Choices

   1. swamp
   2. desert
   3. mountain

Complete the statement

Magnetite is the {0} iron ore, lignite is a {1} grade brown coal, and peat forms from decaying {2} plants.

Instructions

Tap a chip from the bank to fill each blank.

Explanation