How do you separate a fine powder consisting of aluminum soda cans, steel cans, milk jugs, and soda bottles?

Iknow the answer to 13 is b and 14 is d. i just need to know why the correct answers are correct

The big bang nucleosynthesis theory states that elements were produced in the first few minutes of the big bang while elements have their origins in the interiors of stars, forming much later in the history of the universe.

What are transitions between a liquid and gas called? identify which way they are transitioning