Puzzle 1

Longest river in the Americas.

Bowls of mixed veggies and dressing.

To risk money in a game of chance.

Athlete in his or her first professional year.

Tilting metal joints that allow a door to open.

Mineral vital to the thyroid gland, added to salt.

Warplane that drops explosives over a target.

To make something thinner by adding water to it.

__ justice, when someone gets their just desserts.

Soft light fabric made from a crop plant.

Turn on, do this, drop out.

Avengers: Age of __; 2015 superhero flick.