about a hundred thousand dollars
Here's a rephrasing: How are rockets powered, by fuel? Yes, that's pretty much correct.
The answer, is that there are only two types of rockets which fuel modern spacecraft. they are solid fuel rockets, and liquid fuel rockets
The three kinds of rockets are solid fuel rockets, liquid fuel rockets, and ion powered rockets.
90% to 99% of what is in their tanks.
Half a million gallons.
The earliest rockets--i.e., those built by the Chinese as early as the 14 century--used solid fuel.
Rocket fuel.
Yes, both work by action/reaction. Model rockets are just much smaller, thus have much less fuel, so can't go near as high or as far.
The two main types of rockets are, Solid Fuel and Liquid Fuel
A solid fuel rocket engine is just what it sounds like. The fuel inside the rocket is completely solid. In a liquid fuel rocket the fuel is a liquid. Bottle Rockets that you can buy in many stores are fueled with Solid Fuel. Most liquid fuel rockets contain 2 different types of fuel. Once that fuel is mixed and ignited you get your thrust.
Heavier than What?
Solid rocket fuel.