Science
Math
Geography
Riddles
100
Which is faster: sound, or light?
Light
100
What is pie the number? (at least to the second decimal) 
100
On which continent is Mexico located?
North America
100
You go at red and stop at green. What am I?
Watermelon
200
What's the largest bone in your body?
Femur or Thighbone
200
What is the roman symbol for 1000?
M
200
What country is both an island and a continent?
Australia
200
What has 13 hearts but no other organs?
A deck of cards
300
What is the most abundant element in the Universe?
300
What shape has 7 sides?
heptagon
300
What percentage of the world is water?
70%
300
I break but never fall. And I fall but never break. What are we?
What is day and night?
400
What's the 6th planet from the sun?
400
How many seconds are in 1 hour
3,600
400
What is the largest state in the US?
Alaska
400
What thrives when you feed it but dies when you water it?
A fire
500
What does DNA stand for?
500
How many degrees in each corner of an equilateral triangle?
60
500
Provide the name or the location of the largest volcano in the world
Mauna Loa,
Hawaii
500
When you need me, You throw me away. But when you are done with me, You bring me back. What am I?
What is an anchor?