useless trivia: What Word Means: A Koala?

Questions

if you had enough water to fill ---------- goldfish bowls, you could fill an entire stadium?

if you put a raisin in a glass of---------- , it will keep floating to the top and sinking to the bottom?

if you would like to make a ---------- happy, give him a horse-meat steak?

in 1983, a japanese artist made a copy of the mona lisa completely out of----------?

in---------- , six drops make a dash?