Friday, October 24, 2014

Summative Summary Questions

1: Using an example, describe why a population could not increase for ever.

A population is unable to increase for ever because there are many fenomenons in nature mostly deseases that evolve and start killing many humans and the population decreases a lot. Also deseases that we cause ourselves by not eating the right thing or we eat a lot, and that food we don't even for our bodies.

2: What are 2 factors that determine whether a population increases or decreases. (Use each factor in a one-sentence example)

Populations can increase because the animal population that they eat start increasing, then they hunt them a lot, start feeding themselves and they can survive for a long time while they have more and more babies.

3: Give a reason why the Human population of Earth has continued to increase so much for the past hundred years?

Human population has increased a lot because humans have plenty of good resources to survive, and we keep consuming and consuming, and the population starts increasing and we start consuming more. But we are harming the world and that's were we live, if we don't take care of our families there will be many deaths by polution, and the world will damage and will die.


Tuesday, October 21, 2014

Symbiosis explanation

Symbiosis is the relationship between different species, this relationship has three different types.Mutualism, Commensalism, Parasitism. For example the Bee needs the plants for Nectar and then they transport the Polen without even knowing and when it transports it the plants start to reproduce and that's why there are many different species of plants, and that's Mutualism where the two species benefits from each other. Commensalism is when one specie benefits from the other specie but the other one doesn't receive any benefit. For example the shark and the remora, The remora is benefitted with food and transportation/protection, and the shark is being cleaned by the remora because the remora removes food wastes and paracites. Parasitism happens in the case of the Mosquitoe and the Human, the mosquitoe needs food for energy and survival, so the mosquitoe flies searching for good blood, then the mosquitoe takes the blood from the human. The mosquitoe gets the energy while the Human could catch deseases from the mosquitoe.

Friday, October 3, 2014

Discussion Questions

1: Why do we (as scientists) build food webs?

Scientists build food webs for understanding how animals survive eating other animals. They need this for the organization and having a good procedure in the food chain and how do the animals get energy with their environment.

2: Give an example of how one change might affect many other parts of an ecosystem.

Animals eat other animals to survive and coexist with each other. If one animal goes extinct, then the predator of that animal will starve and won't have much to eat. For example: The Owl eats Rats, so if humans start hunting rats or mice the owls won't have nothing to eat and they will eventually die, and then the predator of the Owls will also die and this repetitive chain goes on.

3: Give an example of how one change in La Quebrada might affect the rest of the ecosystem.

La Quebrada is a place with a lot of nature and living things. If one person goes, destroys it and then builds upon it, many different species would die. The ecosystem will be harmed and that space that was one of the most living places on our school will be gone. Not so much clean air for us and many other rewarding things nature can give us will be gone.