Metales Pesados

HEAVY METAL VIRTUAL ACTIVITY.
Form teams of four people maximum. Use your internet access devices.This virtual activity will help you to write your second partial research Project.

1. What is your favorite heavy metal band? ________________________

Go to the websites listed and answer the questions for each section. We will spend very little time discussing
heavy metal contaminationin class. You are responsible for understanding the material through this virtual activity.
http://ga.water.usgs.gov/edu/earthgwquality.html

2. Why does groundwater often contain more dissolved substances in it than water on the surface?

3. Where do water contaminants come from? List at least 4 examples.

There are many contaminants that are found in surface and groundwater. Threethat are regularly sampled and
tested for are Mercury, Arsenic and Lead. Go down the page and look at the table of contaminants, the sources
of these contaminants and their potential health risks. Summarize the info on these three toxins and fill in the
chart below.

Heavy metal | Chemical Symbol | Possible Sources, Potential Health Hazards and Other Risks |
Lead | | |
Mercury | ||
Arsenic | | |
Use your periodic table or go to http://en.wikipedia.org/wiki/List_of_elements_by_name to find the chemical
symbols of these heavy metals.

NOW ANSWER THE FOLLOWING QUESTIONS

Mercury
http://pubs.usgs.gov/fs/1995/fs216-95/

4. Why is it a concern that fish and wildlife contain high, even toxic, levels of mercury?

5. What is the main cause of mercury pollution?6. What does “bioaccumulation” mean?

Arsenic:
http://www.epa.gov/safewater/arsenic/index.html

7. Arsenic is a semi-metal that is odorless and tasteless. How does it enter our drinking water supplies?

8. What is the maximum amount of arsenic allowed in drinking water in ppm?

9. List 4 natural ways arsenic can be released into the environment.

Lead:
10.How are people most commonlyexposed to lead?

11. How does too much lead in drinking water affect children and babies?

12. What would long-term exposure to Pb in water do to adults?

13. Lead is rarely found naturally in water sources, so where does it come from?

14. What should people who live in homes older than 1968 occasionally check?

15. Are new homes totally safe from the possibility of lead exposure?Español

HEAVY METAL VIRTUAL ACTIVITY.
Form teams of four people maximum. Use your internet access devices. This virtual activity will help you to write your second partial research Project.

1. What is your favorite heavy metal band? ________iron maden________________

Ir a los sitios web que aparecen y responder a las preguntas de cada sección. Vamos a pasar muy poco tiempo discutiendocontaminación por metales pesados ​​en la clase. Son responsables de entender el material a través de esta actividad virtual.

http://ga.water.usgs.gov/edu/earthgwquality.html

2. ¿Por qué el agua subterránea a menudo contienen sustancias disueltas en ella más que el agua en la superficie?
porque el agua es un excelente solvente y puede contener muchos químicos disueltos y cuando el aguasubterránea se mueve a través de las rocas tiene una gran oportunidad de disolver las sustancias en las que se mueve como minerales.

3. ¿De dónde provienen los contaminantes del agua? Enumera por lo menos 4 ejemplos.
Químicos industriales, domésticos y agrícolas (fabricas, casas y granjas) así como pesticidas y planticidas.

Hay muchos contaminantes que se encuentran en la superficie y el aguasubterránea. Tres que son regularmente encontrados y verificados son Mercurio, Arsénico y Plomo. Vaya a la página y mire la tabla de contaminantes, las fuentes de estos contaminantes y sus riesgos potenciales para la salud. Resuma la información sobre estas tres toxinas y completar el siguiente cuadro.
TABLA: Marina Cadengo

Heavy metal | Chemical Symbol | Posibles fuentes, los peligros...