What is the smallest category of rock pieces, too small to be seen without a hand lens?
CLAY
What is any nonliving natural resource that makes up Earth, including soil and water?
EARTH MATERIAL
What are the smaller class of rocks, between the size of rice grains and grapes?
GRAVEL
What is bit of dead plant and animal parts in the soil?
HUMUS
What are rocks the size of grapes up to the size of golf balls?
PEBBLES
What is a solid earth material made of two or more minerals?
ROCK
What are bits of rock smaller than rice, down to salt grains?
SAND
What are rocks that are smaller than sand, but bigger than clay?
SILT
What is a mix of humus, sand, clay, silt, gravel, and pebbles called?
SOIL
Name the order of rocks from LARGEST TO SMALLEST.
PEBBLES, GRAVEL, SAND, SILT, CLAY
Name the order of rocks from SMALLEST TO LARGEST.
CLAY, SILT, SAND, GRAVEL, PEBBLE
