very harmful and able to cause illness or death

extremely or unpleasantly dirty

to become gradually damaged, worse, or less

a very small organism that causes disease

to damage something so badly that it cannot be used

to cause sharp but usually temporary pain

extremely important or necessary

all the living things in an area an the way they affect each other and the environment

in order, limit, or rule something, or someone's actions or behaviour

helpful, useful or good

Some kind of snakes can be .....

Cockroaches are the example of the ..... animals

We ____ the environment when we cut down trees.

____ are all around us. We must try to be clean.

what is common misconception about snakes?