I have a project that's due tomorrow and I need to know what will happen when you take a one Gallon milk jug and put hot water in it , pour it out and pour cold water in it what will happen , and why?

What do YOU think will happen.

While we're happy to HELP with your homework we will NOT do it all for you..
Show us what you have done and where you are having problems.

How about trying this yourself as an experiment and note what happens.

What do YOU think will happen.

While we're happy to HELP with your homework we will NOT do it all for you..
Show us what you have done and where you are having problems.
I did the project but Idk why the milk jug shrunk?

Have you been studying heat and cold in school? Has your teacher talked about the properties of heat and cold?

Have you been studying heat and cold in school? Has your teacher talked about the properties of heat and cold?
We're talking about it now

And you have a textbook -- and the entire Internet.

So what happened with the plastic jug?

You said nothing about capping the jug, are you capping it?

You said nothing about capping the jug, are you capping it?
Yeah, but like I think it has something to do with the molecules but I don't know?

And you have a textbook -- and the entire Internet.

So what happened with the plastic jug?
We don't have texts books at my school.

Did you do the experiment?

What grade are you in and do you know how to reseach on the internet? Let me google that for you (http://lmgtfy.com/?q=heat+vs+cold)