What was john hartes observation about tiger salamanders?

1 answer:

3 0

Tiger salamanders live in ponds high on the western slopes of the Rocky Mountains in CO, their numbers had decreased by 65 percent over the years. Harte was looking for the answer as to why this was happening, so he started a scientific investigation, key to this was that he did not form a conclusion, but a hypothesis.

Harte questioned why the number of tiger salamanders was dropping, talked to other scientists and answered many of his questions through observations.

In the natural world, the moisture that falls as rain and snow is very slightly acidic. In the Rocky Mountains the moisture is high in sulfuric acid from power plants, acid precipitation released into mountain ponds, when snow melts it goes into lakes. Harte formed two hypothesis: First, that acids were formed in the upper atmosphere by pollutants, were falling onto the mountains in the winter snows; second, melting snow was making the ponds acidic and harming the salamander embryos.

Harte predicted: he would find acid in the ponds after snow melted, he also predicted that there would be enough acid in the ponds to harm salamander embryos. He found that ponds became more acidic as the snow melted, and salamander lay eggs in the pond after the snow melt.

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Que dificultades tuvo que enfrentar el sistema educativo en las areas trurales

egoroff_w [7]

La respuesta correcta para esta pregunta abierta es la siguiente.

Desafortunadamente, olvidaste mencionar a qué parte de Latinoamérica te refieres. ¿A qué país en específico?

También se te olvidó mencionar a qué época, fecha o momento histórico te refieres.

Sin embargo, tratando de ayudarte podemos comentar lo siguiente.

Hicimos una extensiva investigación para poderte ayudar, y al parecer te refieres a las dificultades que tuvo que enfrentar el sistema educativo en las áreas rurales y urbanas durante el México de la post-revolución.

La primera gran revolución del siglo XX, la Revolución Mexicana, comenzó en 1910 y terminó en 1921. Las consecuencias que generó impactaron todos los sectores de la sociedad mexicana: la economía, la política, lo social, y por supuesto, la educación.

Primero que nada, el gobierno mexicano estableció una serie de reformas a la legislación educativa vigente que de principio no fueron aceptadas. La resistencia al cambio y las condiciones políticas no favorecieron la aceptación de un nuevo sistema educativo postrevolucionario.

Después, la formación de maestros fue limitada. Además, la preparación y criterios de enseñanza-evaluación fueron diferentes en las ciudades, comparadas con las zonas rurales, pueblos, rancherías y las costas. Comenzó a notarse un serio rezago en materia educativa entre las zonas urbanas y las pobres zonas rurales.

Finalmente, un tercer problema muy notorio, fue la infraestructura educativa en ambas regiones. La mayor parte de la inversión en instalaciones y material educativo se destinó a las urbes, olvidando las áreas rurales que son las que más sufrieron por el retraso.

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I think it may be higher or lower

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myrzilka [38]

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In Rwanda the cause of the genocide was “restoration of historical justice,” while in Bosnia it was more of a territorial and interfaith problem.

Explanation:

In the 1994 genocide, 800,000 people were killed in Rwanda. As a result of the three-year conflict in the former Yugoslavia, more than 100 thousand people died, and about two million were forced to leave their homes.

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marishachu [46]

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So technically he didn't tell them.

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Softa [21]

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