Statistics for Name a Valid Answer - Science

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Category	Valid Answers	% Correct
A noble gas	helium \| neon \| argon \| krypton \| xenon \| radon	95%
A layer of the Earth	crust \| mantle \| outer core \| inner core	93%
What the letters of E = mc² stand for	energy \| mass \| speed of light	83%
One of the three types of rock	igneous \| sedimentary \| metamorphic	77%
One of the top 10 largest moons in the Solar System (other than Earth's moon)	Ganymede \| Titan \| Callisto \| Io \| Europa \| Triton \| Titania \| Rhea \| Oberon \| Iapetus	75%
Periodic Table element named for a country	americium \| copper \| francium \| gallium \| germanium \| indium \| nihonium \| polonium	69%
A layer of the atmosphere	troposphere \| stratosphere \| mesosphere \| thermosphere \| exosphere	69%
Name for a wavelength of light on the electromagnetic spectrum	radio \| microwave \| infrared \| visible light \| ultraviolet \| x-ray \| gamma	69%
Subspecies of tiger	Bengal \| Siberian \| South China \| Indochinese \| Malayan \| Sumatran	64%
One of the three largest bones in the arm	humerus \| radius \| ulna	64%
Element whose name ends in C	arsenic \| zinc	61%
A taxonomic rank which comes between genus and kingdom	family \| order \| class \| phylum	61%
Term for a period of time in geology that starts with E	eon \| era \| epoch	60%
A type of strong chemical bond	ionic \| covalent \| metallic	57%
Common names for types of stars	orange dwarf \| red dwarf \| white dwarf \| yellow dwarf \| red giant \| blue giant	51%
DNA bases (hint: CGAT)	cytosine \| guanine \| adenine \| thymine	36%
A type of quark	up \| down \| strange \| charm \| bottom \| top	32%