I need help with my reasons for the seasons portfolio my teacher won't respond to me.

This is what I have so far I don't know if i'm right with the answers I put down already:
Identify the independent variable in this experiment. # Answered

The textbook tilted 10 degrees each time.The circles I drew cept getting lower on the graph paper.

Identify two constants in this experiment. # not answered yet

Identify the dependent variable in this experiment. # answered

They changed how many squares are in the circle.

How did the brightness or intensity of the light change as the degree of tilt increased? # not answered yet

Explain how this demonstration models the way in which the intensity of sunlight shining on earth changes over the course of the year. Be detailed in your explanation. # not answered yet

Which degree of tilt produced light similar to what North America experiences in summer? Explain your answer. # not answered yetIdentify the independent variable in this experiment. # Answered

The textbook tilted 10 degrees each time.The circles I drew cept getting lower on the graph paper.

Identify two constants in this experiment. # not answered yet

Identify the dependent variable in this experiment. # answered

They changed how many squares are in the circle.

How did the brightness or intensity of the light change as the degree of tilt increased? # not answered yet

Explain how this demonstration models the way in which the intensity of sunlight shining on earth changes over the course of the year. Be detailed in your explanation. # not answered yet

Which degree of tilt produced light similar to what North America experiences in summer? Explain your answer. # not answered yet

Oh and you should listen to this song:Justin Bieber - Never Let You Go (Official Music Video) # on YouTube