My English Homework

This is my English homework!!
Please correct!!

Hello, my name is Manami Saito, and today I'd like to talk about Louis Pasteur and his work to discover the functions of bacteria.

Research Question
What is the function of bacteria?

Methods and data
1. He sterilized a flask shaped like a swan neck, and put a boiled soup in it, so bacteria and others could not enter.
2. He left it as it was, but nothing happened.
3. He tilted the flask and let the soup touch the part of the neck playing the role of a filter.
4. Then the bacteria that had been taken in from the outside air invaded.
5. The soup went bad quickly.

Conclusion
He found that bacteria didn't originate from the air without anything. From this simple experiment, it was noticed that life was absent, and found that there were bacteria in the air. He established the field of bacteriology.