1. ............ is the action or state of making or being made impure by polluting or poisoning.

Contamination

Cantamination

Contaminasion

Contamenation

2. ............ is a synonym of contamination.

Adulterant

Filter

Cleanliness

Purity

3. ............ isn't a synonym of contamination.

Adulterant

Purity

Defilement

Pollutant

4. This method of disposal was chosen to avoid potential ............ of Saturn's moons.

biological contamination

biologicaly contamination

biological contaminator

none

5. Levels of biological ............ depend on humidity and temperature that supports the livelihood of micro-organisms.

contaminator

contaminat

contaminated

contamination