The Earth's aphelion position occurs about six months after the earth's perihelion position.The earth's perihelion position is the point in its orbit when it is nearest to the sun. The earth's aphelion position is the point in its orbit when it is the furthest away from the sun. <span> The earth is closest to the sun around 3 January each year and it is farthest from the sun around 4 July every year. It is winter in the northern hemisphere when the earth is closest to the sun, and it is summer in the northern hemisphere when the earth is furthest away from the sun. The seasons in the southern hemisphere are opposite to those of the northern hemisphere.</span>
I don't know exactly which three but these could be some...
Studying local native traditions and life ways in order to become familiar with the local region
Local ecology
Observation: reading the landscape
Animals: tracking, hunting, trapping, making bow and arrows, animal food preparation
Identifying, harvesting and preparing wild edible plants
Fire making
Tool Making and flint knapping
Creating fishing equipment (hooks, lines, etc.), fishing, gutting and preparing fish for cooking
Shelter: building using local materials found at the site
The waste stream: where to excrete
Invisible structures: tribal culture and local tribal custom
Hope this helped!
Flood - A flood is a normal, common disaster when it rains so heavy, that rivers began to overflow. They're very common throughout the United States, but it isn't common if states don't have any lakes or streams, but it can still happen. When lake or streams get flooded, the national weather service will issue a flood warning.
Flash Flood - A flash flood, still common, is a overflow of rapid water, that can move at 2.7 meters per second! They're known to occur at mountain ranges and arid plains. A flash flood can be more dangerous than a original flood, because the rapid water speeds can sweep you away with the water. Even if you try to swim, you won't be able to get out.
It's gets colder, wetter, and not much sun is received.
For example, use the food web of a savannah biome.
Let's say the hippos all disappeared. Because the hippos are prey for the tertiary predators like a hyena, the population of the predators would decrease while the population of the grass increased.
If the predators disappeared the preys' population would spiral out of control and all the primary producers like leaves and grass would become scarce. Additionally, the decomposing carcass of animals like dead predators and prey create food for microorganisms which make fertile soil; thus, causing the land to become barren.
