What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

Make eight squares by moving only two matchsticks.
Note- Square can be of different sizes.

I look at you, you look at me, I raise my right, you raise your left. What am I?

How many triangles can you find in this given picture?

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

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

What Adam and Eve do not have but the rest of the people have?

A man plots the murder of his wife. His plan is full proof. Nobody saw them leaving their house. He stabbed her with a knife while driving. She died on the spot. He threw her body in a valley. He threw the knife carefully wiping his finger prints on a random garbage bin. Then he went back to his home and no one was watching him this time as well.

After an hour, he was called by the local police department who informed him that his wife was murdered. They asked him to reach the scene of crime immediately. But as soon as he arrived at the crime scene, he was arrested by them.

How did the police know that he himself is the murderer?

I have thought of a number that is made up by using all the ten digits just once. Here are a few clues for you to guess my number:

First digits is divisible by 1.
First two digits are divisible by 2.
First three digits are divisible by 3.
First four digits are divisible by 4.
First five digits are divisible by 5.
First six digits are divisible by 6.
First seven digits are divisible by 7.
First eight digits are divisible by 8.
First nine digits are divisible by 9.
The number is divisible by 10.

Can you find out the number ?

Can you make a six-letter word using the letters N, A and B ?