Statistics for Science Multiple Choice #3

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Question	Answer	% Correct
In 1971, astronaut David Scott dropped a hammer and a feather on the surface of the moon. What happened?	Both objects fell at roughly the same speed	84%
What is E. coli?	a Bacterium	83%
Which type of blood vessel carries blood from the heart out to the rest of the body?	Arteries	83%
How many molecules are in a mole?	About 6.02 x 10²³	82%
What sex chromosomes do most human males have?	XY	82%
What was the Cambrian Explosion?	An increase in diverse species beginning about 541 million years ago	79%
Which continent has the greatest number of marsupial species?	Australia	77%
Which of these particles has the lowest mass?	Electron	72%
Where is the asteroid belt?	Between Mars and Jupiter	71%
If a radioactive substance has a half-life of 1 year, how much of it will be left in 3 years?	1/8	67%
What type of galaxy is the Milky Way?	Spiral	66%
What does Hertz measure?	Number of cycles per second	45%
Take a sheet of metal with holes in it. Heat the metal. What happens to the holes?	They get larger	37%
Would you weigh less on the equator than the North Pole?	Yes	32%
What phylum are humans in?	Chordata	21%