1)What science ideas did you learn?
Answer:
I learned about refraction of the light.

2)How did you learn these ideas?
Answer:
I learned these ideas from the experiments.

3)Why is it important to know this idea( what real world application is there)?
Answer:
Because it is very important in our life. For example by these knowledges we can learn/explain mechanism of our vision, how camera works and etc.