Biology
Earth and Astronomy
Physics
Chemistry
Challenge questions （200 extra)
100
Name the organelle labelled "G"
Mitochondrion (singular)/ Mitochondria (plural)
100
What percentage of the Earth's surface is covered with water?
71% (or 70%)
100
What type of diagram is this?
Lewis Diagram
100
Meet Dumbledore (scribble scribble) Gandalf(up), a fictional character in The Lord of the Rings (book/movie). In this scene of the movie, Gandalf fought against the monster Balrog of Moria, and sent it tumbling down the dark pit beneath the mines saying his famous line, "YOU SHALL NOT PASS!" (No offense to anyone, I hope you all pass your exams:).Unfortunately, the Balrog swung his whip during the fall and grip hold of Gandalf, therefore bring him down as well. Assume there is no air resistance, the whip of the Balrog was just long enough to reach to Gandalf's ankle (Lwhip=88.0m), gmiddle earth=gearth, and Gandalf decides suddenly to count "Mississippi" as soon as the Balrog starts falling, how many "Mississippi" can he say before falling himself? (round to the closest syllable) 
Mississippi mississippi mississippi mississippi mi
Lwhip=88.0m = distance Balrog fell (d)
d=1/2gt2
t=sqrt(2*d/g)
t=sqrt(2*88/9.8)
t=4.2378...s
about 4 and 1/4
200
What are the four nitrogenous bases of DNA and how do they pair up?
adenine (A), thymine (T), guanine (G), cytosine (C)
A-T, G-C
200
Name the 1 star and 8 planets of the solar system.
Star: Sun
Planets: Venus, Mercury, Earth, Mars, Jupiter, Saturn, Uranus, Neptune (No Pluto!).
200
What is the name of the Element "U"?
Uranium
300
What is the full name of DNA?
Deoxyribonucleic acid
300
What are the latitudes (North and South) that marks the tropics?
23.5°N and 23.5°S
300
Name the acid: CH3COOH
Acetic acid
400
What is the largest organ of the human body?
The skin
400
Identify the constellation shown in the picture:
Orion
400
Mr. T needs to slide a slice of pizza across a 3-meter-long table (don't ask why). The table is an ideal smooth surface, and there is a perfect pink sphere with a diameter of 0.5 meters placed right in the middle of the table. Mr. T avoids the sphere by lifting up the slice of pizza, move it over the perfect pink sphere, then put it back on the table to continue sliding it to the end. What is the total work done on the pizza by Mr. T?
0 J
400
Romeo sets off in his spaceship to marry Juliet, who lives on the planet Lovelon, 10 light-years away from earth. He can accelerate at 15 m/s2, and must decelerate at the same rate, in order to stop at Lovelon. Unknown to him, Juliet has taken an earlier shuttle back to Earth and she will wait there. Since there is no communication, Romeo will have to travel back again! Romeo left yesterday, on June 16th, 2025. What is the earliest year in which they can be wed? Romeo and Juliet are both classical persons, and they ignore any relativistic effects! (1 light-year is about 9.46 x 10^15 m)
A)2027 (B) 2032 (C) 2035 (D) 2065 (E) They will die from old age first
If Romeo travels all the way there at 15 m/s^2, then 10 light-years will take him a time given by 10 x 9.46 x 10^15 = 1/2 x 15 (time)^2 giving 1.123 x 10^8 seconds, or 3.56 years, and he will be moving at 16.85 x 10^8 m/s, which in Startrek language is Warp 5.6! This won't do him much good of course, because he will pass Lovelon at this speed. Romeo has to travel half-way to Lovelon, 5 light-years, then reverse his rockets to decelerate for another 5 light years at 15 m/s^2, so that he arrives at low speed for docking. This splits the journey exactly in half, due to the obvious symmetry of the motion. At the half-way point he'll be moving at 11.9 x 108 m/s, which is near enough Warp 4!
It'll take him 7.94 x 10^7 sec to get half-way, about 2.51 years, so the total time to get to Lovelon and then back to earth will be 4 times this, or 10.07 years. They can wed in 2035 (C).
500
How is the bird's respiratory system unique?
Birds have a special breathing mechanism called DOUBLE RESPIRATION, it allows the birds to absorb oxygen more efficiently. This process involves air passing through the lungs twice.
500
Scientists are able to identify the elements that made up a star by looking at its spectral lines. Can you?
3. Magnesium and hydrogen
500
Name the 6 types of quarks.
Up, down, top, bottom, strange, charm.
500
If electric energy costs $0.1 per kilowatt hour, and is delivered to your home at a voltage of 120 Volts, what is the cost of one electron? (only take the exponent for the answer, e.g 2.76x10^18, take 18)
(Note that the charge of an electron is 1.6 x 10^-19 Coulombs, and the power delivered by electric flow is equal to the voltage times the current.)
P = I V, E = I V t = C V. If C = 1.6x10^-19 Coulombs and V = 120 Volts, then the energy of one electron is:
2x10^-17 Joules = 2x10^-17 Watt Second = 2x10^-20 kW second = 7x10^-24 kW hr = 7x10^-25 Dollars. (Or only take the exponent, -24, more fermi question style)