Dependent and Independent Clause

The dog is playing catch.

When my mother arrives.

Because I studied hard for my test.

I was watching my brother play video games.

Cheetahs are the fastest land animals.

While I was playing soccer.

Is the underlined portion an INDEPENDENT or DEPENDENT clause?:

Shazia could not catch the bus as she was running late.

Is the underlined portion an INDEPENDENT or DEPENDENT clause?:

Because he was often late to school, Joe was behind on his work.

Is the underlined portion an INDEPENDENT or DEPENDENT clause?:

Aria is 14, but she is in the 10th grade.

Identify the dependent clause in this sentence:

When Laura looked under the microscope, she could see the cell's structure in great detail.

Identify the dependent clause in the following setence:

Unless you stay indoors all day, you should protect your skin with sunscreen.

Identify the dependent clause in this sentence:

As Destiney added new chemicals to the solution, her lab partner recorded the results of the reaction.

Identify the independent clause in the following sentence:

Alejandra should join our band if she knows how to play the guitar and read music.