Questions
What will happen if the girl keeps blowing the balloon?

If the girl keeps blowing the balloon, it will burst.
What does a scientist do after he observes?

A scientist makes a hypothesis after he observes.
What is air called when it blows?

When air blows, it is called "wind".
What is in the box?

There's nothing/a lot of air in the box.
What senses does a scientist use to observe?
They are sight, hearing, touch, smell and taste.