Weathering
the breakdown of the lithosphere (rocks) into soil through contact with Earth’s atmosphere, water and biological organisms.
weathering
any process that causes a rock to crack or break into pieces without changing its composition
physical/mechanical weathering
any process that causes rocks to breakdown resulting in change in composition
chemical weathering
as ____________ increases, weathering increases. HINT: smaller particles have more of this
surface area
What is Mr. Richards' favorite tv show?
The Bachelor
Whats a name for physical weathering?
mechanical weathering
water seeps into cracks in a rock. HINT: When water freezes, it expands by 10% causing the rock to split apart. Name both.
Frost action and ice wedging
carbon dioxide dissolves into water and forms a weak acid which reacts with certain rocks and minerals (calcite, limestone, marble, chalk)
carbonation
as _____________ of minerals increases, weathering rate decreases
• softer, less resistant minerals/rocks wear away leaving harder, more resistant minerals/rocks behind
hardness
What is Mr. Richards' favorite baseball team?
Yankees
Which type of weathering changes the composition of a rock?
chemical weathering
rocks are heated by the sun and expand; when temperatures fall, the rock cools and contracts
exfoliation
certain minerals in rocks will dissolve in water and rock will crumble
hydration
the major factor that affects weathering
• as humidity increases, weathering increases
• as temperature increases, chemical weathering
increases
• warm, moist
• as temperature decreases, physical weathering
increases
Climate
How old is Mr. Richards?
26
Does weathering make rocks more round or more rigid?
round
plants/roots will grow into cracks in rocks causing them to split as they grow
plant action
gases released from the burning of fossil fuels dissolve into water droplets in clouds to produce an acid. This acidic rainwater will chemically react with the mineral calcite causing it to bubble and chemically break down, creating underground caves.
acid rain
combination of weathered rock and organic matter (humus - decayed plant/animal remains)
Soil
What is Mr. Richards' favorite food?
HINT: football
Buffalo wings
Name one example of both physical weathering and chemical weathering?
=)
sediments carried by streams and wind blown sand cause particles to collide into each other and the surrounding rock, making them smaller and more rounded.
abrasion
oxygen combines with certain minerals in rocks - the chemical change of the mineral weakens the rock and the rock crumbles.
Ex) rust
oxidation
List these sediments from largest to smallest.
• Pebbles
• Cobbles
• Clay
• Silt
• Sand
• Boulders
• Boulders
• Cobbles
• Pebbles
• Sand
• Silt
• Clay
What video game is Mr. Richards currently playing?
COD BO4