-logy
-meter
re-
-ible/-able
-graph
100

biology

the study of life

100

thermometer

measure heat

100
recycle

circle again

100

audible

able to hear

100

photography

light writing or light drawing

200

astrology

study of the stars

200

speedometer 

measure speed

200

revision

see again

200

portable

able to carry

200

telegraph

writing from far away

300

audiology

study of hearing

300

audiometer

measures hearing

300

request

ask again

300

visible

able to  see

300

biography

life writing

400

phonology

study of sounds

400

hydrometer

measure water

400

rescope

to observe closely again

400

moveable

able to move

400

autograph

self written

500

pathology

study of feelings, study of hurts

500

biometer

measure life

500

rehydrate

water again

500

capable

able to use your head

500

bibliography

written about books