MindMap Gallery physical geography basis
The mind map of the basics of physical geography organizes the movement of the earth, the shaping of surface morphology, the movement of the atmosphere, the movement of water, and the integrity and difference of the natural environment.
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This is a mind map about bacteria, and its main contents include: overview, morphology, types, structure, reproduction, distribution, application, and expansion. The summary is comprehensive and meticulous, suitable as review materials.
This is a mind map about plant asexual reproduction, and its main contents include: concept, spore reproduction, vegetative reproduction, tissue culture, and buds. The summary is comprehensive and meticulous, suitable as review materials.
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physical geography basis
Earth's movement
Earth's rotation and revolution
rotation
meaning
The rotational movement of the Earth around its axis of rotation is called the Earth’s rotation
time
Reference object
Solar day--24 o'clock
Sidereal day - 23 hours, 56 minutes and 4 seconds
direction
from west to east
speed
Angular velocity
15° every time
Line speed
The equator decreases toward the north and south poles, and there is no linear speed.
Revolution
meaning
The movement of the earth around the sun is called the earth's revolution.
direction
from west to east
time
Reference object
sun
The Year of Return - 365 days, 5 hours, 48 minutes and 46 seconds
other stars
Natural year--365 days at 6 hours, 9 minutes and 10 seconds
track
Approximately a perfect circle
perihelion in January, aphelion in July
Huang Chiao Kok
meaning
The angle between the equatorial plane and the ecliptic plane
angle
23°26′
direct sunlight range
23°26′ north latitude to 23°26′ south latitude
Extreme day and extreme night range
90° north latitude to north latitude
90° south latitude to south latitude
The geographical significance of earth motion
Day and night cycle and jet lag
Day hemisphere - the hemisphere facing the sun
cycle
a solar day
significance
Such a period is of appropriate length so that the daytime on the ground will not be too Hot, the night will not be too cold, which is conducive to life The survival and development of the organism.
Night hemisphere - the hemisphere facing away from the sun
Time zone
Cause
At the same latitude, locations in the east will see the sunrise earlier than locations in the west
divide
Every 15° of longitude, the local time difference is 1 hour
Each time zone spans 15° of longitude. Based on the prime meridian, From longitude 7.5° west to longitude 7.5° east, it is divided into the middle time zone, or zero time zone
To the east - East District 1 to East District 12
To the west - West District 1 to West District 12
International date line--180° longitude
Common time zones
United Kingdom - Central Time Zone
Tokyo - East 9th Ward
China - East Eighth District
Moscow - East Third District
Cairo - East 2nd District
New York - East Fifth Ward
geostrophic deflection
direction
Northern Hemisphere deflects to the right
Southern Hemisphere deflected to the left
There is no geostrophic deflection at the equator
significance
Affects large-scale airflow and water horizontal movement of flow
Features
The geostrophic deflection force only changes the direction of motion of a horizontally moving object and does not affect its speed.
The length of day and night and the height of the sun at noon Variety
Changes in length of day and night
From the vernal equinox to the autumnal equinox, the sun shines directly on the northern hemisphere, and the day length in the northern hemisphere is longer than the night length.
On the summer solstice, the sun shines directly on the Tropic of Cancer. The northern hemisphere has the longest day and the shortest night. The Arctic Circle and the areas north of it all have polar days.
From the autumnal equinox to the spring equinox of the following year, the sun shines directly on the southern hemisphere, and the days are shorter and the nights are longer at all latitudes in the northern hemisphere.
On the winter solstice, the sun shines directly on the Tropic of Capricorn, and polar night occurs in the Arctic Circle and areas north of it.
On the vernal and autumnal equinoxes, day and night are of equal length around the world
The change of seasons and the division of five zones
changing of seasons
Summer is the season with the longest days of the year and the highest altitude of the sun at noon.
Winter is the season of the year with the shortest days and the lowest altitude of the sun at noon.
Spring and autumn are the transition seasons between winter and summer.
Five belt divisions
The northern and southern tropics—between the northern and southern tropics of cancer
The northern and southern temperate zones - between the Tropic of Cancer and the Arctic Circle
The northern and southern frigid zones - north of the Arctic Circle and south of the Antarctic Circle
shaping of the earth's surface
The forces that shape the earth's surface
Internal force effect
Energy source - thermal energy from the earth's interior
Effect - will cause significant changes in the surface morphology
Manifestation - crustal movement, magmatic activity and metamorphism
Crustal movement refers to the displacement or deformation of the lithosphere due to internal forces (main method)
reflect
continental drift
Ground uplift and subsidence
earthquake
Metamorphism generally occurs deep in the earth's crust and cannot directly shape the surface morphology.
When the lithosphere ruptures, deep magma rises along the rupture zone, intrudes into the lithosphere or erupts to the surface, which is called magma activity.
external force
Energy source - outside the earth, mainly solar radiation
Performance - weathering, erosion, transportation, accumulation
Weathering - Under the action of external forces, rocks on or near the surface undergo breakage, disintegration, chemical decomposition, and biological decomposition.
physical differentiation
chemical differentiation
Erosion - External forces such as flowing water, waves, wind, and glaciers also damage the surface of the earth.
Transport - the products of weathering or erosion are transported away from their original position under the action of external forces
Accumulation - the material being transported is gradually deposited
Function - Destroy the surface of the earth and transport and accumulate the products of weathering and erosion
Trend - flattening of land surface morphology
material cycle in the lithosphere
Origin - igneous rocks, sedimentary rocks and metamorphic rocks can be converted into each other, so that the materials in the lithosphere are in a cyclical change
Igneous rock - magma invades the upper part of the lithosphere or erupts out of the earth's surface, cools and solidifies to form igneous rock.
Sedimentary rock - clastic material is deposited after being transported by wind, flowing water, etc., and is compacted and consolidated to form sedimentary rock
Metamorphic rock - Under the high temperature, high pressure and other conditions inside the earth, the composition and properties change to form metamorphic rock
formation of tectonic landforms
Geological Structure and Landforms
folds
Under the strong extrusion force caused by the movement of the earth's crust, the rock layers will be plasticized. Sexual deformation, resulting in a series of wavy bends
syncline
Rock formations generally curve downward
anticline
Rock formations generally arch upward to form mountains
fault
The rock layer fractures and undergoes significant displacement along the fracture surface
level
causing the rock formations to be staggered in the horizontal direction
vertical
Relatively ascending rock formations form massive mountains and highlands, while relatively descending rock formations form valleys and lowlands.
along the fault line
form ravines, rivers
Plate movement and landforms
plate movement patterns
Opposite
Collision or subduction, resulting in the formation of huge mountain systems, trenches, and island arcs
separated
Forming rifts and oceans
The activity level of the sector
Internally relatively stable
The interface is relatively active
Impact of mountains on transportation
Reasonable choice of transportation methods
Choose transportation routes rationally
Development of river landforms
The evolution of the river valley
river erosion
Early stage - Mainly eroded downward and towards the source, making the valley continue to deepen and lengthen
Middle stage - the downward erosion of the river weakens, and the erosion towards both sides of the valley increases. Strong, the river begins to bend
Later stage - the river valley widens, and the cross section takes on a wide and shallow trough shape
The formation of alluvial plains
Materials transported by rivers are deposited to form river accumulation landforms
piedmont alluvial plain
When the river flows out of the mountainous area and enters the plain, as the terrain becomes gentler, the materials transported by the river gradually Deposited in the piedmont, forming a fan-shaped accumulation landform
flood plain
Rivers accumulate on convex banks, forming underwater accumulations, which emerge from the water surface during the dry season to form floodplains. Abandoned floodplains are connected together to form a broad floodplain plain.
delta plain
The sediment carried by the river will be deposited in front of the river mouth, forming an approximately triangular accumulation body. The accumulation body will expand to the ocean side and develop into a vast delta plain.
The impact of river landforms on settlement distribution
favorable conditions
Provide sufficient production and domestic water for settlements
Transportation channels can facilitate external communication and transportation of the settlement.
Provide abundant agricultural and sideline products for settlements
Adverse conditions
May be at risk from flooding
Atmospheric movement
Common weather systems
Fronts and weather
cold front
A front in which cold air masses actively move toward warm air masses
Rain or snow weather occurs
warm front
A front in which a warm air mass actively moves toward a cold air mass
More continuous precipitation
quasi-stationary front
The cold and warm air masses are evenly matched, or they are blocked by terrain and move slowly or A front that rarely moves
Bringing rainy weather
Low pressure (cyclone) and high pressure (anticyclone)
low pressure
The area where the central air pressure is lower than the surrounding air pressure is called low pressure, or low pressure for short.
causing rainy weather
high pressure
The area where the central air pressure is higher than the surrounding air pressure is called high pressure, or high pressure for short.
it's clear
Pressure and wind belts
The formation of pressure and wind belts
Cause
The factors causing atmospheric movement are high and low latitudes The uneven heating of the area and the geostrophic deflection force
air pressure belt
equatorial low pressure belt
Subtropical high pressure belts in the northern and southern hemispheres
Subpolar low pressure belt in northern and southern hemispheres
polar high pressure zone
wind belt
Low latitude trade wind belts in northern and southern hemispheres
Northern Hemisphere—Northeast Trade Winds
Southern Hemisphere—Southeast Trade Winds
northern and southern hemispheres Mid-latitude westerlies
Prevailing west wind
Polar easterlies in northern and southern hemispheres
polar east wind
The influence of sea and land distribution on pressure zones and wind zones
Northern Hemisphere (Asia as an example)
winter
Cold high pressure appears on land
Formation of northeast and northwest monsoons
summer
A thermal low pressure appears over land
Formation of southwest and southeast monsoons
Southern Hemisphere
The ocean area occupies an absolute advantage, and the pressure zones are basically distributed in a band shape.
The influence of pressure zones and wind zones on climate
Impact of pressure zones on climate
low pressure belt
Updrafts prevail, water vapor condenses easily, precipitation is abundant, and the climate is humid.
high pressure belt
Downdrafts prevail, water vapor is difficult to condense, and precipitation is scarce
Warm high pressure: hot and dry
Cold high pressure: cold and dry
Impact of wind belts on climate
Air flow from low latitudes to high latitudes
More precipitation
Air flow from high latitudes to low latitudes
less precipitation
Ocean blows to land
Abundant water vapor and more precipitation
land blows to ocean
Water vapor is scarce and precipitation is less
water movement
Terrestrial water bodies and their relationships
terrestrial body of water
type
Rivers, lakes, glaciers, swamps, groundwater
reserves
3.47%
effect
Supplies the fresh water needed for human production and life water
interrelationship
rivers and lakes
Lakes regulate rivers, rivers feed into lakes
Rivers and Groundwater
replenish each other
Rivers and glaciers with snow
Glacier snow feeds rivers
ocean current
Cause
atmospheric flow
law
Ocean circulation in mid- and low-latitude sea areas
Flows clockwise in the Northern Hemisphere and counterclockwise in the Southern Hemisphere
Ocean circulation in mid- and high-latitude sea areas of the Northern Hemisphere
Flow in counterclockwise direction
Westerly drifts in the Southern Hemisphere
westerly drift
Monsoon currents in the North Indian Ocean
winter
Counterclockwise rotation
summer
Rotate clockwise
effect
climate
transport heat
forming precipitation
biology
form a fishing ground
Sea-air interaction
Maintaining the balance of water and heat on Earth
El Niño and La Niña
El Niño
ocean east coast
The downdraft weakens or disappears, or even an updraft appears. The weather has changed from dry and drier to rainy, causing floods.
ocean west coast
The updraft weakens or disappears, and the climate changes from warm to warm A transition from wet and wet conditions to drier and drier conditions, leading to drought or forest fires
La Niña
ocean west coast
The seawater temperature in the west increases, the air pressure drops, and moist air accumulates to form typhoons and tropical storms
ocean east coast
The overturning of deep cold water causes the water temperature to drop, and local high pressure causes drought.
The integrity and difference of the natural environment
integrity of the natural environment
Material migration and energy exchange between natural environmental elements
form a mutually penetrating, mutually restricting and interdependent interconnected whole
The unified evolution and combination of elements of the natural environment
Coordinated development
The overall response of the natural environment to disturbance
domino effect
overall function of the natural environment
overall functionality
natural environment factors work together
production function
synthetic organic matter
stabilization function
Natural environmental elements enable the natural environment to self-regulate and maintain stable properties through material migration and energy exchange.
Regional differences in the natural environment
regional difference
Regional external conditions
close to sea
Solar radiation is mostly used for evaporation, and the water cycle is intense
close to sea
More solar radiation is converted into wind energy
Large amounts of solar radiation
tropical landscape
Little solar radiation
boreal landscape
Differences in the natural environment
Differences in spatial scale
Land regional differentiation patterns
high latitude
cold climate
low latitude
tropical climate
mid latitudes
East coast of mainland China
Subtropical evergreen broad-leaf forest belt, temperate deciduous broad-leaf forest belt and coniferous broad-leaf mixed forest belt
Mainland West Coast
Subtropical evergreen hard-leaf forest belt and temperate deciduous broad-leaf forest belt
Coast to mainland
Forest zone - grassland zone - desert zone
Vertical regional differentiation rules
Low to high: broadleaf forest, coniferous forest, grassland, glacier