16 terms

Soils, Rocks, and Landforms (investigations 1 & 2)

STUDY
PLAY
earth materials
solids, liquids and gases that make up Earth
weathering
When large rocks break down into smaller rocks over time
abrasion
the rubbing, grinding, and bumping of rocks that causes physical weathering
soil
A mix of humus, sand, silt, clay, gravel, and/or pebbles.
rock
a solid earth material made of two or more minerals
silt
Rocks that are smaller than sand, but bigger than clay
particle
A very small piece
humus
bits of dead plant and animal parts in the soil
physical weathering
When rocks are broken down into smaller rocks, but don't change in any other way.
chemical weathering
When minerals in a rock change because of chemicals in the air or water
erosion
when earth materials are carried away by weather, wind or ice
geologist
a scientist who studies the earth
landform
A feature of the land such as a mountain, canyon, or beach
deposition
the settling of sediments
sediment
a piece of weathered rock
property
something you can observe about an object