An expert who studies or works in one of the sciences
Scientist
A type of antibiotic (= a medicine that kills bacteria)
penicillin
is something or someone that looks dirty or untidy
mess
A room or building with scientific equipment for doing scientific tests or for teaching science, or a place where chemicals or medicines are produced
laboratory
Very small organisms that are found everywhere and are the cause of many diseases
Bacteria
To try to hurt or defeat using violence
attack
A substance, such as water, that is not solid or a gas and that can be poured easily
liquid