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Math
100

The 26th element

What is iron

100

how many countries are there

195

100

MgO2

magnesium oxide

100

if -3x x y + 78x= 4x, what is y

28

200

whats it called when a lizard regrows its tail

Epimorphic regeneration

200

who discovered America

Leif Erikson

200

potassium oxide

K2O

300

Einstein's theory of relativity

E=mc2

300

why did Columbus sail to America

to find a new trading route

300

chemical formula for obsidian

70–75% SiO2, plus MgO, Fe3O4

400

temp of earths core

5400c

400

who searched for the Seven Cities of Cibola

Francisco Vázquez de Coronado

400

More commonly known as Louwala-Clough to the Klickitat Native American tribe, what stratovolcano erupted on May 18, 1980 and caused over $1.1 billion in damage in Washington according to the International Trade Commission?

mount st. helens

500

can black holes evaporate

yes

500

Only french explorer evah

René Robert Cavalier, Sieur de la Salle

500

what material is SiO2

rose quartz

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