food
metals
sport
subjects
abstract
100
necessary for life
water
100
expensive metal
gold
100
soccer
football
100
stars and planets
astronomy
100
love
200
all babies need it
milk
200
it may be electronic
iron
200
basketball
200
its father is Herodotus
history
200
a good teacher needs
knowledge
300
beer
300
...of fish
tin
300
it needs thinking
chess
300
Newton ,Ampere
physics
300
factories, cars produce it
smoke