Soil
physical weathering
chemical weathering
vocabulary
Rocks
100
What is the loose top layer of Earth's surface?
soil
100
How is this picture physical weathering?
The roots of the tree are breaking apart the rock.
100
What happened to the marble and the limestone when it was mixed with acid rain (vinegar)?
White crystals formed
100
abrasion
the rubbing, grinding, and bumping of rocks that cause physical weathering
100
weathering
the process by which larger rocks crack and break apart over time to form smaller rocks
200
Name the 5 kinds of rocks found in soil?
pebbles, gravel, sand, clay and silt
200
What is happening in this picture?
Ice is causing the rock to expand, eventually the rock with break apart.
200
What happened to the basalt and sandstone when it was mixed with the acid rain (vinegar)?
Nothing
200
expand
when the volume of a substance increases or gets bigger
200
a metamorphic rock formed when limestone is subjected to heat and pressure
marble
300
earth material
any natural resource that makes up Earth, including soil and water
300
What causes physical weathering in a landslide?
Abrasion
300
5 causes of chemical weathering
water, air (oxygen), sulfuric acid (acid rain), carbonation (carbon dioxide and water) and plant acids
300
a form of precipitation containing acid, which forms when carbon dioxide gas in the air dissolves in water droplets; a form of chemical weathering
acid rain
300
a sedimentary rock made mostly of calcite
limestone
400
What is humus?
bits of dead plant and animal parts in the soil
400
5 forces of physical weathering?
temperature, ice, living organisms, gravity and/or abrasion
400
What is the liquid that is the main cause of chemical weathering?
water
400
To become hard or stiffened due to loss of heat is?
freeze
400
a rock composed of smaller pieces like clay, silt, sand, gravel, and pebbles
conglomerate
500
Soil
A mix of humus, sand, silt, clay, gravel, and/or pebbles
500
physical weathering
Rocks breaking down into smaller pieces without changing what the rock is made of.
500
Chemical Weathering
The process by which the minerals in a rock can change due to chemicals in water and air. Chemical weathering can cause rocks to break apart.
500
chemical reaction
A process in which two or more materials mix in a way that forms new materials.
500
Calcite
A common rock-forming mineral in Earth’s crust