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... Take a plastic pill bottle with a snap-on lid, a spoonful of water, and an Alka-Seltzer tablet. Place upside down, and you have an interesting classroom demonstration. Small solid rocket ... varieties. Mixing your own rocket propellant is very dangerous and can cause serious injuries. Rocket clubs can provide guidance and safety procedures for those who insist on building their own. ---- Answer ...

... in your seat inside a crew vehicle, atop a reusable launch rocket, waiting for a huge explosion underneath you to carry you to space. For the first two minutes, it will take a lot to concentrate because of the tremendous noise and vibrations caused by the rocket ...

... estimated and continually updated to be sure there will be enough money. Finally, a commitment is made to build, test, and fly the spacecraft. ---- Answer provided by Jon H. Brown Image:K2S ...

... is done pretty much just like you do it on Earth. After brushing, you have the option of either swallowing the toothpaste or spitting it out into a washcloth. ---- Answer provided by Dr. Jay ...

... can hit any and every surface, if you are not careful. The best thing to do is to move slowly and make sure that you can grab onto some part of the ship ...

... you go swimming you are putting your body in a different environment than the normal air. So, in order to function effectively in water you have to learn a new system of moving around—you ... , eventually learning to swim. In weightlessness, it's the same idea. It's a different environment that requires you to learn new ways of moving around. One very effective method is to ... place. It's also very useful to use a wall or chair to push off of with your hands or feet, so that you can move about quickly. ---- Answer provided by Dana ...

... in order to survive. That means we wouldn't exist if we were not near a star like the Sun. The Sun keeps the water on Earth from freezing solid. But ... produce the chemical elements in hot nuclear reactions. But now we have to explain how stars exist You can see that the question gets bigger and bigger. All I've really described is how we exist, not why we exist. There is no scientific way to answer the ...

Designing rockets to carry payloads or people safely into space requires diligent work. The engine must operate at high pressures and temperatures, and the vehicle must carry a very large amount of ... assembled and again after it is assembled. So, designing, building and testing a new rocket vehicle to take payloads or people into space requires a large number of people—maybe thousands—and ...

You know it is morning on the Moon when the Sun peeks over the horizon, just ... . Unlike the Earth, there's no atmosphere to diffuse the light, so it will be a much more sudden dawn. ---- Answer provided by Thomas Matula, Ph.D. & Kenneth J. Murphy Image ...

... . Col. Fincke, the Space Shuttle also has telephone capability. The telephone is actually a part of a computer much like you will see on your Internet connection. This allows the crewmembers to access a computer on Earth that then connects them to a land line so that the call ...

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