Chernobyl Health Article

Name: Una and Haley L.
Read the article, Chernobyl’s effects linger on (http://news.bbc.co.uk/hi/english/sci/tech/newsid_743000/743879.stm) and answer these questions.

1. When was this article published?

This article was published on May 10, 2000.

2. Why will restrictions on some food continue in the United Kingdom and former Soviet Union for another 50 years?

Restrictions on some food will remain for another 50 years because the environment is not cleaning itself nearly as fast as was predicted.

3. Where have high levels of radioactive cesium been measured?

Abnormally high levels of caesium were measured in Norway and Cumbria.


4. What happened to the levels of radioactive cesium during the first five years after the Chernobyl accident?

Its half-life rose between 1 and 4 years after the Chernobyl explosion.

5. Describe why levels of radioactive cesium are not decreasing anymore.

Levels of radioactive ceasium are not decreasing because of diffusion.

6. Why is diffusion of radioactive cesium back into the environment occurring? Explain the physical principle behind this diffusion.


When the balance between the radiation in the soil and water and the radiation absorbed in the soil changes, the gradient levels itself out and the difference between take-up and release alters.


7. How long will the United Kingdom have to continue restrictions on sheep from the Cumbria region as a food item for humans?

The sheep from the Cumbria region will need to continue to be restricted for another 10-15 years which is 100 times longer than predicted.

8. How long will forest berries, fungi, and fish from parts of the former Soviet Union remain restricted?

Forest berries, fungi, and fish from the former Soviet Union will remain restricted for another half century.

All rights reserved. Science NetLinks Student Sheets may be reproduced for educational purposes.Chernobyl’s Effects – E-Sheet Questions

Lesson Title: The Chernobyl Disaster Page 2 of 2
Name:__________________________
Now read Chernobyl Children Show DNA Changes http://news.bbc.co.uk/hi/english/sci/tech/newsid_1319000/1319386.st and answer these questions.

1. Who are the children that this article is about? To whom were they born?

The children in this article were born into the liquidator's families.

2. What are “liquidators”?

Liquidators are the people who cleaned up Chernobyl and were exposed to the most radiation.

3. Why are scientists studying the children?

The children had the highest doses of any children.

4. What are the controls in this study?

The siblings of the children tested were the controls in this study.

5. Describe what scientists discovered about the children’s DNA.

Scientist discovered that the children’s DNA was contaminated from their exposure to radiation and not their parents.

6. Describe the factors that may be linked to the number of DNA changes observed in children.

The factors linked may be the time between exposure and conception and the amount of contamination from the liquidator.

Read Nuclear Energy Agency: Health Impact http://www.nea.fr/html/rp/chernobyl/c05.html and answer these questions.

1. Describe what happens to DNA, cells, and organs after low and high doses of radiation.

High Doses- Cell death cannot be accommodated and may lead to organ failure.
Low Doses- Cell death can be accommodated by the mechanisms that regenerate cells.

2. Describe the acute health effects of the Chernobyl disaster.

499 people were admitted for observation and 237 of those were diagnosed with acute radiation syndrome.

3. Describe the chronic or late health effects of the Chernobyl disaster.

The chronic or late health defects of the Chernobyl disaster were known as "stochastic effects" which were cancer induction and hereditary defects and their frequency was dose dependent.

Conservation for the People notes

• In 2004 the World Conservation Union placed three vultures—the long-billed, the slender-billed and the Oriental white-backed — on the critically endangered list.
• For a long time, observers did not know what was causing the vultures’ decline. Some speculated the culprit was habitat loss or pollution. Several years ago researchers discovered that the birds were being killed by an anti-inflammatory drug, diclofenac, commonly administered to cows.
• The cows would take the medicine and then the vultures would eat their dead carcases, because the cows had that anti-inflammatory drug in the system and the vultures ate it then they would become sick, with more dead cows every where wild dogs, and domesticated dogs started to eat the cows, the population of the dogs flourished so much and then more dog spread disease would become common and more people would die from that. DOMINO EFFECT.
• Preserving biodiversity is very important especially in hot spots.
• If we protect the hot spots then we can ensure that people are a priority.
• biodiversity hot spots- small areas that harbor a great variety of endemic, or native and geographically restricted, plant species.
• Only around 30% of people have heard of biodiversity
• harbor life raft ecosystems that are conservation priorities for the people and scientists. Such ecosystems are ones whose conservation and restoration would dramatically improve people’s lives. These countries include India, Laos, Cambodia, Bangladesh, Rwanda, Sierra Leone, Burundi, Haiti, Guatemala, Liberia, and The Gambia.
• Human health is also threatened when ecosystems and natural cycles break down.
• Almost two million people die every year because of inadequate or unclean water supplies. Conserving wetlands and forests would reduce these deaths
• One quarter of a million people join the planet every day. More forests and wetlands will be cleared for agriculture, and more ocean species will be fished to depletion.
• conservationists should collaborate more closely with development experts.
• In California, the nonnative European honeybee is the most important pollinator from an economic perspective. If the European honeybee population were to become dramatically reduced (and it has recently been threatened by introduced mites), some of the less abundant native bees might increase and fill the vital economic role of crop pollinators.
• The World Bank is also encouraging nations to embrace green accounting methods in which economic assets and national productivity assessments include measures that credit environmental and ecosystem services and subtract degradation that results from pollution or destructive extraction.

Galapagos Giant Tortoise

Giant Galapagos tortoises usually can live up to 150 years and 175 years is the record for the longest living land mammal ever, and it was set by Jonathan the Giant Galapagos Tortoise.

• A Giant Galapagos Tortoise can live one year without food or water and still maintain the weight of 550 pounds.

The Giant Galapagos Tortoise sleeps for 16 hours a day.

The original ancestor of the tortoises was probably of normal size and evolved into the present day giants after its arrival in Galapagos. This is due to a phenomenon seen in many island ecosystems where gigantism evolves because there is no longer any need to hide from predators and because there are no other similar animals to compete with for food. Once the tortoises spread around the archipelago, they evolved on their isolated islands into the different races we see today, some with domed carapaces (shells), and others with saddleback carapaces. The unusual saddle shape is believed to have evolved several times on different islands, showing that it must be a very successful design for life in Galapagos.

Guppies

1. If being flashy and colorful attracts predators, why do you think guppies are so colorful?

Guppy populations are evolving to more closely match or stand out from their environment.

2. After viewing the guppy gallery, pick the fish you find most interesting. What is the fish’s scientific name, origin and average size? Describe the coloration of the fish you chose.

Guppy or millions fish, Poecilia Reticulata, Brazil. Large patch of shiny black coloration on the top of its back, yellow, white, green, and red spots throughout the bottom of the bottom and fin.


3. After viewing the predator gallery, pick the fish you find most interesting. What is the fish’s common name, scientific name, and origin?
Fat Sleeper, Dormitator maculatus, Southern North America, Bahamas, and Latin America
4. View the guppy’s habitats, what habitat conditions would affect the predator populations?

Some habitats that would affect that predator population most would be the dams which keep out predators so they can't reach the guppies and some of the smaller deeper lakes/ponds would keep lots of guppies as well as predators.


Endler’s Discovery and Variations of Guppy’s in Pools

5. Who is John Endler? What did he study and where did he study it?

John Endler is a professor who is also a ethologist and evolutionary bioligist noted for his work on the adaptation of vertebrates to their unique environments
6. For each of the three stream areas, describe the guppy coloration:

Pool 1: Brightly multi-colored with large spots. Pool 2: Medium coloration on body and tail, with medium-sized spots. Pool 3: Drab coloration, very small spots concentrated near tail.

7. Develop your own hypothesis about guppy coloration. The hypothesis should answer the questions: Why do guppies in different areas of the stream have difference in coloration? (You can choose from the list on the simulation, or make up your own)

Predators are causing guppy generations to become more drab by preying on the most brightly-colored individuals and eliminating them from the gene pool.




Guppy Simulation

	% of Brightest Guppies (10 generations)	% of Bright Guppies (10 generations)	% of Drab Guppies (10 generations)	% of DrabbestGuppies (10 generations)
Trial 1 Guppy: Even Mix Predators: 30 Rivulus	42%	25%	28%	5%
Trial 2 Guppy: Even Mix Predators: 30 Rivulus, 30 Acara	43%	41%	16%	0%
Trial 3 Guppy: Even Mix Predators: 30 Rivulus, 30 Acara, 30 Cichlid	2%	0%	8%	90%
Trial 4 Guppy: Mostly Bright Predators: 30 Rivulus	75%	20%	4%	1%
Trial 5 Guppy: Mostly Drab Predators: 30 Rivulus, 30 Acara, 30 Cichlid	0%	0%	7%	93%

Summary

8. Describe how predators influence guppy coloration.

Predators influence guppy coloration because the predators eat the brightest most colorful guppies therefore the guppy coloration is slowly leaning towards the drab side.

9. Was your hypothesis correct, use your data to justify your answer.

Our hypothesis was correct because the predators eating the brightest fish cause the population of them to fall while the drab population rizes.

10. What does it mean that “male guppies live in a crossfire between their enemies and their would be mates”?

It means that male guppies while being bright and attracting mates, they also attract predators so they are stuck between mating and being pray to other fish.


11. Why do you think guppies in different areas of the stream have different coloration?

The further down the stream the drabber the guppies get because the lower they are the fewer predators that are able to reach that area. If you go to the top of a stream fewer predators will be there so there will be more bright guppies.


12. What would happen to mostly drab guppies that were placed in a stream with very few predators?

They would most likely survive a long time because they won't stand out as much as other bright guppies.

13. What would happen to brightly colored guppies that were placed in a stream with many predators?

They would most likely be eaten soon after and the drabbest of those guppies would survive the longest time.

Biodiversity

Q:What are ways in which preserving biodiversity locally might have a global effect?
A: Preserving biodiversity in a local way can have a global effect, If other people see how we are preserving biodiversity then they will want to help to. If we preserve biodiversity in Bangladesh and India on a local level then less trees would be logged. If less trees are logged there then there would be more air for us to breathe and less death in India from the floods. Less people dying and more oxygen is good. :)

Q: How do habitat destruction and loss of species effect more than just one area?
A: If all of the trees are cut down in India, then not only would India be effected,but so would a lot of the world. India would have major flooding and they wouldn't have much wood to make wooden products out of and to export them to other countries. Other countries wouldn't have any wooden products imported or exported.

Q: How does preserving biodiversity enhance the life of people?
A: Preserving biodiversity can enhance the life of people because we might/ most likely be able to find cures for cancer, AIDS, etc the cone snail is a great example. The cone snail's population is dropping and if it becomes totally extinct then bye-bye cures for diseases. We would be able to save lives.

Other sites used:
http://www.suite101.com/article.cfm/science_students/88655

Gases and Climate Change

Combustion Demo

Hypothesis- If the rubbing alcohol covers the inside of the bottle and it is set on fire, then a flam will come out of the top of the bottle.

Observation- The bottle few across the floor at least 2 yards, and a huge blue flame came out of the bottle. The bottle went very fast across the floor.

What I learned...

• The earth has gotten hotter.
• Icecaps and glaciers are melting which causes the water levels to rise.
• There are many chemicals in the air, which have caused the atmosphere to get thinner, causing the earth to get warmer.

CO2 Gas Demo

Hypothesis- If the baking soda and the vinegar become a gas, then the mixture will catch on fire.

Observation- The carbon dioxide burned out the fire of the candle, because a flam needs oxygen to survive and the CO2 caused the fire to go out.

Hydrogen Gas Demo

Hypothesis- If the hydrogen becomes a gas and fire is introduced to it then it will catch on fire.

Observations-

• The beaker is very warm.
• The zinc was completely gone.
• The hydrogen gas did catch on fire.

Chernobyl 5 questions

1. Did Chernobyl affect the fall of the Soviet Union?
2. What are the events that happened before the nuclear accident that late April night in 1986?
3. What did this disaster do to the economy of eastern European countries, like Germany, Poland, Turkey, Austria, and Sweden. Explain.
4. What are some of the most common and most deadly radioactive elements that were released in the the air from the Chernobyl explosion
5. Why are people no longer inhabiting Chernobyl?