Pyroclastic material that is less than 2 mm in diameter is called ...

[acc299]

Pyroclastic material that is less than 2 mm in diameter is called ___________________ _. Particles
  ranging from 2 to 64 mm in diameter are known as ___________________ _, while
  ___________________ _ and ___________________ _ are pieces larger than 64 mm in diameter. Fill in the blank(s) with the appropriate word(s).

Question 2

Pahoehoe is lava erupted by Hawaiian volcanoes that has a(n) ___________________ _ viscosity and
  a(n) ___________________ _ appearance. Fill in the blank(s) with the appropriate word(s).

[momolu]

Answer to Question 1

ash, lapilli, bombs, blocks
ash, lapilli, blocks, bombs

Answer to Question 2

low, ropy

[acc299]

Excellent

[xthemafja]

Gracias!