Chemistry
Biology
Math
100
It's the chemical formula for water.
What is H2O?
100
The human heart has this many chambers.
What is four?
100
The four basic operations of arithmetic are addition, subtraction, multiplication, and this.
What is division?
200
The three states of matter are solid, liquid, and this.
What is gas?
200
This organ removes wastes and extra fluid from your body.
What are kidneys?
200
10% of 120.
What is 12?
300
NaCl (Sodium Chloride) is commonly known as this.
What is (edible/table) salt?
300
This is the largest animal on the planet.
What is the Blue Whale?
300
The study of triangles, angles, and sides belongs to which of these: Algebra, Calculus, or Trigonometry?
What is trigonometry?
400
Of the particles called electrons, protons, and neutrons, this one has a positive charge.
What is a proton?
400
The average human body has 206 of these.
What are bones?
400
The number of minutes in 3.5 hours.
What is 210 minutes?
500
Citric, Hydrochloric, and Sulfuric are types of this.
What are acids?
500
Plants absorb carbon dioxide and release this gas during photosynthesis.
What is oxygen?
500
Ancient people used this bead-and-rod tool to do arithmetic.
What is an abacus?