Why is the sky blue? Facts you should know

Am gasit o kestie tare interesanta:

Think you know you know your science? Recently, several science gurus—Nobel Prize winners, institute heads, teachers and others who spend most of their time thinking about science—were asked, “What is one science question every high school graduate should be able to answer?”

Take their quiz and see how you do

1. What percentage of the earth is covered by water?

ROBERT GAGOSIAN, WOODS HOLE OCEANOGRAPHIC INSTITUTE

2. What sorts of signals does the brain use to communicate sensations, thoughts and actions?

TORSTEN WEISEL, ROCKEFELLER INSTITUTE, NEW YORK

3. Did dinosaurs and humans ever exist at the same time?

ANDREW C. REVKIN, NEW YORK TIMES SCIENCE REPORTER

4. What is Darwin’s theory of the origin of species?

JONATHAN WEINER, 1995 PULITZER PRIZE-WINNING AUTHOR

5. Why does a year consist of 365 days, and a day of 24 hours?

LESLIE SAGE, NATURE MAGAZINE

6. Why is the sky blue?

ROY GLAUBER, 2005 NOBEL PRIZE WINNER; HARVARD UNIVERSITY

7. What causes a rainbow?

KIM KASTENS, COLUMBIA UNIVERSITY

8. What is it that makes diseases caused by viruses and bacteria hard to treat?

HELLE GAWRYLEWSKI, JOHNSON & JOHNSON (AND THE AUTHOR’S MOTHER)

9. How old are the oldest fossils on earth?

PAUL NURSE, 2001 NOBEL PRIZE WINNER; ROCKEFELLER INSTITUTE

10. Why do we put salt on sidewalks when it snows?

ARTHUR KNUDSEN, BRIDGETON, N.J., SCHOOLS

Extra credit: What makes the seasons change?

If this quiz wasn’t as easy as you thought it would be, you’re not alone. According to a recent National Science Board survey, 90 percent of Americans are interested in science, but only 15 percent consider themselves well-informed. In high schools, only 60 percent of students complete a general biology class, while only 40 percent complete a general chemistry class and a scant 27 percent complete a physics class, according to the National Center for Education Statistics.

Even if you did learn basic science in school, these questions might be tough to answer, according to O. Roger Anderson, professor of science education at Teachers College at Columbia University.

“People are so deeply involved in their family lives and professions,” Anderson said. “How are they supposed to remember this stuff?”

 

Raspunsurile am sa le pun intr-un post viitor.. :P (asta daca nu cumva, cineva va raspunde meanwhile) :D

 

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