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Earth's Physical Geography
Transcript of Earth's Physical Geography
The varying amounts of sunlight around the Earth during the year, creates the seasons. The Forces That Shape The Earth Water Wind erosion has little effect on solid rock
Wind erosion involves the movement of dust, sand and soil from one place to another.
Fierce winds swept up dry, overworked soil from exposed farmland and carried it away in dust storms
Wind erosion , however, also provides benefits.
The dust carried by wind often forms large deposits of mineral-rich soil. At any time half of the Earth faces the sun
This part has day
The other half of the Earth faces away from the Sun.
It recieves no light it is dark and is night. The North Pole Tilts Towards the Sun It is Summer time in countries in the Northern Hemisphere It is Winter time in countries in the Southern hemisphere The North Pole Tilts Away From the Sun It is Winter time in countries in the Northern Hemisphere It is Summer time in countries in the Southern Hemisphere The forces that form the earth are highly linked with water, wind and erosion.
Moving water is a very powerful force, capable of tumbling large boulders.
Most rocks have rounded edges; this is a result of the tumbling action as currents move the rocks.
Another form of moving water, waves are responsible for eroding beaches by loosening and carrying away the sand. Latitide and Climate Low Latitudes
Recieves direct rays of the sun year round
Have warm to hot climates High Latitudes
Recieves contiuous but indirect sunlight Mid-Latitudes
Ranges from fairly hot to fairly cold
Dramatic seasonal changes Elevation and Climate At all latitudes elevation influences climate
The Earth's atmospher thins as altiitude increases
Thinner air retains less heat
As elevation increases, temperature decrases
Even im bright sunlight, the world's highest mountains are cold, snowy places Wind and Ocean Currents
Ocean currents affect the temperature by moving hot or cold water from one location to another.
The dominant air currents that affect climate are known as prevailing winds
Prevailing winds bring air from one type of climate to another. Large bodies of water are slower to heat and cool than land.
As a result, water temperatures are more uniform and constant than land temperatures The autumnal equinox is the 1st day of Autumn
It occurs when the North Pole begins to lean away from the sun. The vernal equinox is the 1st day of Spring
It begins when the North pole begins to lean toward the sun again. Plates that move slowly around the globe produced Earth's largest features...
Continets, oceans, and mountain ranges
Mountains and islands are created by internal forces called subduction and accretion
Earthquakes and volcanoes also shape the surface of the Earth. Most plants and animals live in areas with very specific climate conditions, such as temperature and rainfall patterns, that enable them to thrive. Any change in the climate of an area can affect the plants and animals living there, as well as the makeup of the entire ecosystem. Climate
The ability of soil to hold water
The slope, or angle, of the land all determine what types of plants will grow in a particular region. Vegetation regions can be divided into five major types: Forest
Ice Sheet Grasslands are, as their name suggests, flat and open areas where grasses are the dominant type of vegetation. It is a hole in the Earth from which molten rock and gas erupt.
Volcanoes are mountains formed by lava or by magma that breaks through the earth's crust. What causes a Volcano? What causes a Tornado ? Most tornadoes form from thunderstorms.
You need warm, moist air from the Gulf of Mexico and cool, dry air from Canada.
When these two air masses meet, they create instability in the atmosphere. http://resources.woodlands-junior.kent.sch.uk/time/seasons.htm
http://www.weatherwizkids.com/weather-tornado.htm Resources What causes a hurricane ? Hurricanes start when warm, moist air from the ocean surface begins to rise rapidly, where it encounters cooler air that causes the warm water vapor to condense and to form storm clouds and drops of rain. What causes an earthquake ? An earthquake is what happens when two blocks of the earth suddenly slip past one another. Since a typhoon is just another term for hurricane, the same conditions apply for both.
A pre-existing disturbance, warm ocean water, low atmospheric stability What causes a typhoon ?