Coal is composed primarily of which chemical element?
What gas is primarily responsible for the greenhouse effect?
Oxygen | Helium | Carbon dioxide | Nitrogen
Which branch of mathematics is primarily concerned with the properties and relations of the sides and angles of triangles?
Trigonometry | Calculus | Algebra | Geometry
What primarily blocks the sun's ultra-violet rays from reaching the Earth?
Rainforests | Ozone Layer | Clouds | Mountains
The kiwi bird primarily uses which sense to hunt for food?
Smell | Hearing | Touch | Sight
Which European capital primarily sources its hot water supply from geothermal springs?
Helsinki | Oslo | Reykjavik | Dublin
What is the ingredient used in bread making that makes it rise?
Which prefix is used to denote a millionth in the SI system of units?
What French word is used to describe an additional song at the end of an artist's performance?
