Everyday Life
Earth & Environment
Science & Health
Society & Economy
General Knowledge
The Arts & Media
100

apples, bananas, oranges

fruits

100

sun, rain, snow

weather

100

 internal organs

stomach, liver, lungs

100

currencies

yen, dollar, euro

100

Mars, Venus, Jupiter

planets

100

string instruments

guitar, violin, cello  

200

Transportation

cars, buses, trains

200

hurricane, tornado, blizzard

natural disasters

200

 biological conditions

heart rate, body temperature, blood pressure

200

 leadership roles

CEO, manager, supervisor

200

 mathematical operations

addition, subtraction, multiplication

200

mass media

newspapers, television, radio  

300

footwear

sneakers, boots, sandals

300

dirty air, plastic bags in the sea, dirty river water  

pollution

300

 nutrients / macronutrients

carbohydrates, proteins, fats

300

 social issues

poverty, crime, unemployment

300

metals

copper, iron, silver  

300

visual arts

sculpture, painting, photography  

400

communication methods

email, text message, phone call

400

 renewable energy

solar, wind, geothermal

400

infectious diseases

measles, influenza, tuberculosis  

400

 economic sectors/industries

retail, manufacturing, agriculture

400

natural sciences

biology, chemistry, physics  

400

legal documents

contracts, wills, deeds  

500

infrastructure

bridges, roads, tunnels

500

helping the earth / eco-friendly actions

recycling, planting trees, picking up trash

500

bacteria, viruses, fungi

 microorganisms

500

commodities

gold, crude oil, wheat  

500

 agricultural techniques

crop rotation, irrigation, plowing

500

freedom of speech, right to vote, right to a fair trial

civil rights / human rights

595

household appliances

refrigerator, microwave, dishwashe

595

greenhouse gases

methane, carbon dioxide, nitrous oxide

595

blood components

plasma, platelets, red blood cells

595

Inflation, interest rates, GDP

 economic indicators

595

protons, neutrons, electrons

subatomic particles

595

sonnet, haiku, limerick

poetic forms