That's true to say that affect is a verb and effect is a noun (that's the easy part!)

However your sentences need some corrections, "Smoking affects our health in a very negative manner." Also "The effect of smoking is bad for our health." Good effort in answering though! Can anyone else give us some examples of these words being used in the correct context?

Something affects us when it has an influence on us.

For example: "What you eat affects your health".

Effect is used to describe when one thing bring about change in another thing.

"Smoking has a negative effect on your health". 

The words a, an, the, any, some, no, take, and into are commonly used with effect.

"Lecturing me and telling me what to do has no effect on me".

Source: atoothforatooth channel.

affect is a verb while effect is a noun  
Smoking affects the health badly .
Smoking effect is bad on the health  

<em>The verb "affect" is connected with the noun" effect". </em>

<em>You can say something affects you. You can also say something has an effect on you.</em>

<em>Such as with keti's example sentence, we can see how to use them to express the same thing with different structures.</em>

<em>" Other people's opinions usually affect our behavior."</em>

<em>"Other people's opinons usually have an effect on our behavior."</em>

Other people's opinion usually affect our behavior. 

A parents' effect on their kids is far more in early age.