Upgrade to remove ads
6th Grade - Science - Weathering, Erosion, and Soil
Weathering Soil Formation Wind and Water Erosion Glacier and Gravity Erosion
Terms in this set (70)
Natural physcial or chemical process that causes rock to change, breaks then down, and causes them to crumble.
What is weathering?
Freezing, thawing, wind, rain, plants, animals
Name some examples of weathering
Breaks rocks into smaller pieces without changing chemically
What is mechanical weathering?
Ice, wind, gravity, plants, animals
Name some examples of mechanical weathering
Process where water seeps into cracks of rocks, freeze and expand, thus breaking the rock
What is ice wedging?
The grinding and wearing away of rock surfaces through mechanical action of other rock or sand particles.
What is abrasion?
Name an example of abrasion
Plants roots can become so strong that it breaks rock layers; animals burrow into softre rock and break it.
How do plants and animals cause weathering?
Rocks break down as a result of chemical reactions
What is chemical weathering?
Natural acids, water and air
Name examples of chemical weathering
Carbonic acid (acid rain)
What does water and carbon dioxide form?
It will wear away and dissolve the statues details due to the acidity in the rain
How does carbonic acid or acid rain change a statue over time?
What acid is formed from plants?
What is rust an example of?
What is the rust process called?
Mixture of weathered rock, organic matter, mineral fragments water, and air that supports the growth of vegetation
What is soil?
O, A, E, B, C, Bedrock
What are the layers of soil in order?
Rock formation that is the source of mineral fragments in the soil
What is parent rock?
Layer of rock beneath the soil
What is bedrock?
The terms can be used as the same thing. A lot of time, bedrock is the parent rock.
How are bedrock and parent rock releated?
After soil forms, what can start to grow?
In order of size, clay is the smallest, then silt, and then sand size particles.
Describe the different particles of soil.
Soil quality that is based on the proportions of soil particles
What is soil texture?
Describes a soil's ability to be broken from farming
What is consistency?
How water is able to move (infiltration)
What does soil texture influence?
Arrangement of soil particles
What is soil structure?
Ability to hold nutrients and to supply nutrients to a plant
What is soil fertility?
Dark colored organic material that provides nutrients to soil
What is humus?
Where is humus located?
Warm temeratures, rich humus, nutrient poor due to a lot of vegetation
Describe tropical rain forest climate and soil.
Less nutrients, various toxins that can kill plants
Describe desert climate and soil.
Good amount of rain, fertile soil
Describe grassland climate and soil.
Little rain, bad soil formation, not very fertile
Describe arctic climate and soil.
The natural process by which wind, water, ice or gravity transports soil and sediment from one location to another
What is erosion?
Rock and energy from waves. The energy breaks down rock.
What is needed to make sand? Explain.
Place where land and a body of water meet.
What is the shoreline?
How long and hard the wind is blowing.
What does the size of the wave depend on?
Waves traveling in groups
What are wave trains?
The upper part of the wave moves quicker and taller. Once it has become so tall, it will eventually break
What goes on in wave trains?
The bottom drages against the sea floor and the waves slows
What happens when waves reach shallow water?
Sand, rock, coral, shells
What are items that can be deposited on the beach by wind erosion?
Moves sand in a zigzag. Waves approach shore at an angle and then leave perpedicular to the shore.
Explain longshore current and how waves move.
Underwater or exposed ridge of sand, gravel, or shell material.
What is a sandbar?
Wind removes soil, sand, and prck particles and transports them from one place to another.
How does wind erosion work?
Because roots tend to hold soil in placeand trees can break up the wind.
Why are the areas with little vegetation vulnerable to wind erosion?
Removal of find sediment
What is saltation?
Particles too heavy or big for wind
What is left behind after saltation?
More speed, more ability to pick up heavier objects
How mcuh wind carries depends on wind speed. Why?
What types of particles are deposited first?
Thick, powdery deposits of fine sediment
What is loess?
Mounds of wind deposited sand, sand in wind hits and obstacle, slows down and creates a dune. One slopin side and a steep side.
Explain dunes and how they form.
Massive moving ice block capable of eroding, moving, depositing large amounts of rock material.
What is a glacier?
In what regions do glaciers form?
Where do alpine glaciers form?
In valleys by water erosion, they widen the valley into a U-shape
Where do valley glaciers form? Explain.
Huge masses of ice spread across continents
What are continental glaciers?
When enough ice builds up and makes it heavier
When do glaciers move downhill?
Sliding and flowing
What are the 2 methods of glacial movement?
Bowl-shaped depression where glacial ice cuts back into the mountain.
What is a cirque?
Jagged ridges that form between 2 or more cirques cutting into the same mountain
What is aretes?
Sharp, pyramid shapes peak fromed when 3 or more cirques erode a mountain.
What is a horn?
All material carried and deposited directly by a melting glaciers
What is a glacial drift?
Unsorted rock material that is deposited directly by a melting glacier
What is till?
gravity pulls every object toward the center of the Earth
What is mass movement?
process in which sediments move slowly downhill
The sudden and rapid movement of a large amount of material downslope
What is a landslide?
heavy rains, deforestation, construction, and earthquakes
What causes a landslide?
When a mass of rock or sediment moves downhill along a curved surface
Layers of rock break loose from slopes and slide to the bottom
Describe a rock slide.
Mass of wet sediment that flows downhill over the ground surface
Describe a mudflow.
This set is often in folders with...
Science Rocks & Minerals Illustrated
Weathering, Erosion and Soil-9.3 and9.4
You might also like...
6th Grade - Science - Weathering, Erosion, and Soil
- Science - Weathering, Erosion, and Soil
HUGE SCIENCE STUDY GUIDE
Chapter 14 Weathering and Erosion Study Guide and…
Other sets by this creator
Moon Phases, Tides, Eclipses
Moon Phases, Eclipses, and more
Science TEKS 8.13: Astronomy, Moon Phase…
Circuits & Switches