Very little pieces of something
particles
The way something feels
texture
The breaking apart or dissolving of rocks
weathering
A part of soil with bits of decayed plants and animals
humus
A layer of loose material that covers the earth
soil
Something you can observe with your senses
property
A dry region of sand and rocks with few plants
desert
Tiny bits of rock
sand
Hills of sand
dunes
A soft mineral
graphite
A hard mineral
diamond
A person who studies nature
scientist