英文關鍵字
acid
air
background
beaker
black
blue
boil
bubble
bubbles
carbon
chemical
chemist
chemistry
co2
color
cylinder
danger
dioxide
effect
eruption
examination
experiment
experimental
flask
flow
fluid
foam
foamy
froth
gas
glass
growing
lab
laboratory
liquid
process
reaction
research
science
scientific
soap
substance
technology
temperature
test
texture
tube
water
work