AOA.........


QUESTION 1:
What is the general name for a solution that produces positive ions and has a pH of 0 to 7?


QUESTION 2:
What is measured by all of the following: miles, meters, light years?


QUESTION 3:
On VENUS the “rain” evaporates before it reaches the planet surface. The rain isn't water. What is it?


QUESTION 4:
What element has the smallest atomic weight, on Earth is usually a gas, and has several uses as a fuel?


QUESTION 5:
Who was the famous father of computer programmer Ada Augusta King (aka Ada, Countess of Lovelace)?


QUESTION 6:
What chemical substance do a diamond, a pencil and charcoal all have in common?


QUESTION 7:
Is it more appropriate to treat virus infections such as chicken pox, influenza, and the common cold with an antibiotic or with aspirin?


QUESTION 8:
The binary number 101101 is equal to 45 in base 10. What is it equal to in base 8?


QUESTION 9:
What is the name of the unit of matter than consists of a nucleus with a positive charge, and a set of electrons that move around the nucleus providing an equal but negative charge?


QUESTION 10:
Approximately what percentage of an average person's body is water:
5%, 15%, 35%, or 55%?


QUESTION 11:
Deoxyribonucleic acid (also known as desoxyribosenucleic acid) is a complex molecule that contains the genetic code for inherited characteristics of a particular species. What initials are commonly used when referring to this molecule?


QUESTION 12:
Can you name at least two of the three or four people who are most closely associated with the elucidation of the stucture of the complex molecule described above in Question 11. ?


QUESTION 13:
Which of the following elements (that on Earth all are normally gases in our atmosphere) on a dry day makes up about 80% of the air we breathe?
Argon, carbon dioxide, helium, hydrogen, krypton, neon, nitrogen, oxygen.
(Our air also normally contains water vapor, hydrocarbons, hydrogen peroxide, sulphur compounds, in very small and variable amounts.)


QUESTION 14:
What is the term used for the warming of the Earth that is thought to be caused by the presence in Earth's atmosphere of an abnormally high level of carbon dioxide and other gases that allow passage of heat from the sun to the Earth's surface but reduce the radiation of heat back into space?


QUESTION 15:
What is the name of the substance that as early as 1785 was used to treat heart failure by British physician William Withering. It acts by increasing the force of heart muscle contractions. This substance was (and still is) obtained from the leaves of the foxglove plant?


QUESTION 16:
Malaria is caused by infection with protozoal parasites called plasmodia. Specifically what female, blood sucking agent is responsible for transmitting this infection ?


QUESTION 17:
Light of all colors (white light) comes to Earth from the sun. Why do we see a cloudless sky as blue and not white?
a) The cells in the retina of our eyes are most sensitive to blue light?
b) The Earth's magnetic field bends blue light more than yellow or red?
c) Air molecules scatter the blue light more than yellow or red?


QUESTION 18:
Of the many species of spiders (perhaps more than 100,000 species of spider exist) very few are dangerous to humans. Which of the four named below has a poisonous venom in its fangs that is deadlier even than that of a rattlesnake?
Wolf spider, tarantula, black widow spider, recluse spider.


QUESTION 19:
What is the gas (with molecules each made up of three oxygen atoms) that forms a layer in Earth's upper atmosphere and absorbs harmful ultraviolet radiation from the sun thus preventing it from reaching Earth's surface?


QUESTION 20:
A Japanese amateur astronomer discovered the comet that came within 8 million miles of Earth on March 25, 1996 and was visible to the naked eye near the "North Star." What was the comet called?


REGARDS


SAMIA SIBGA