Spot 5 differences in two Christmas tree below:

With the help clues provided in the image, can you find the 5 digit key?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?

A tree doubled in height each year until it reached its maximum height over the course of ten years. How many years did it take for the tree to reach half its maximum height?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

What mathematical symbol can be put between 5 and 9, to get a number bigger than 5 and smaller than 9?