Wednesday, November 28, 2007

Tuesday, November 20, 2007

Thanksgiving


Thanksgiving - Fact Sheet




Thanksgiving Day, a national holiday in the United States commemorating the harvest reaped by the Plymouth Colony in 1621, after a winter of great starvation and privation. In that year Gov. William Bradford proclaimed a day of thanksgiving, and the feast was shared by all the colonists and the neighboring Native Americans. Although similar observances were held locally, they were sporadic and at no set time. After the American Revolution the first national Thanksgiving Day, proclaimed by George Washington, was Nov. 26, 1789. Abraham Lincoln, urged by Sarah J. Hale, revived the custom in 1863, appointing as the date the last Thursday of November. In 1939, 1940, and 1941 Franklin D. Roosevelt proclaimed Thanksgiving the third Thursday in November. When a contradiction arose between Roosevelt's proclamation and some of those of state governors, Congress passed a joint resolution in 1941 decreeing that Thanksgiving should fall on the fourth Thursday of November. The day is observed by church services and family reunions; the customary turkey dinner is a reminder of the four wild turkeys served at the Pilgrims' first thanksgiving feast.

Tuesday, November 13, 2007

Eating disorders



Obesity
What is obesity?


Obesity is a condition in which the natural energy reserve, stored in the fatty tissue of humans, is increased to a point where it is associated with certain health conditions or increased mortality. It’s measured using the BMI (Body Mass Index).

What is BMI?


BMI, or body mass index, is a simple and widely used method for estimating body fat. It is calculated by dividing the subject’s weight by the square of his height
BMI=kg/m2
Where kg is the subject’s weight in kilograms and mis the subject’s height in metres.
The current definitions commonly in use establish the following values:


- A BMI less than 18.5 is underweight
- A BMIL of 18.5—24.9 is normal weight
- ABMI of 25.0—29.9 is overweight
- ABMI of 30.0—39.9 is obese
- A BMI of 40.0 or higher is severely (or morbidly) obese
- A BMI of 35.0 or higher in the presence of at least one other significant co morbidity
is also classified by some bodies as morbid obesity.

What are the effects on health?



Health consequences result of increased fat mass or increased number of fat cells. Increased fat mass:
. Osteoarthritis;
. Obstructive sleep apnea;
. Social stigma.

Increased number of fat cells:
. Diabetes;
. Cancer;
. Cardiovascular disease.


Research done by: Paula Cerqueira, 8ºG

Rainforests


HOW CAN WE SAVE RAINFORESTS


Rainforests are disappearing very quickly. The good news is that there are a lot of people who want to save rainforests. The bad news is saving rainforests is not going to be easy. It will take the efforts of many people working together in order to ensure rainforests and their wildlife will survive for your children to appreciate and enjoy.

Some steps for saving rainforests and, on a broader scale, ecosystems around the world, is to focus on “TREES”:



Teach others about the importance of the environment and how they can help save rainforests;
Restore damaged ecosystems by planting trees on land where forests have been cut down;
Encourage people to live in a way that doesn’t hurt the environment;
Establish parks to protect rainforests and wildlife;
Support companies that operate in ways that minimize damage to the environment.

Text written by Ana Paulina Barbosa, nº2, 8ºG