useless trivia: The Soviet ---------- is the first strike fighter with a toilet in it.?

Questions

it takes about a half a gallon of water to cook macaroni, and about a ---------- to clean the pot?

it's impossible to get water out of a ---------- tyre?

---------- pounds of space dust and other space debris fall on the earth everyday?

2,000 pounds of ---------- and other space debris fall on the earth everyday?

---------- of the solar system mass is concentrated in the sun?