SCIENCE: Periodic Table: Element, atomic number 14, symbol Si?

Questions

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

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 ---------- tire.?

---------- 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.?