Is the following group of words an independent or dependent clause?

Martha held her trophy high, so the whole room could see it.

I am trying to decide which book I want to read next.

When we get enough snow, we're going to go sledding.

I tend to be grumpy until I have my coffee in the morning.

The beach is a lot of fun, but the movies are even better.

I was very happy because I had pizza and ice cream.

Is the following group of words an independent or dependent clause?

Unless you finish your homework.

before the sun rises

The cat chased the mouse around the house.

Is the following sentence a dependent or independent clause?

Jane washed her dog in the bath tub.

Do the words in RED form a dependent clause or independent clause?

Rhonda gasped when a six-foot snake slithered across the sidewalk.

This type of clause contains a subject and a verb AND expresses a complete thought.