Rockets

Who invented gunpowder?

• Germans

• Americans

• Chinese

• Russian

What was gunpowder mainly used for?

• war

• fireworks

• weapons

• signaling

What were the main uses of rockets?

• weapons, signaling and fireworks

• weapons, space travel and fireworks

• signaling, war and education

• space travel, fireworks and war

In what century was the possibility of using rocket science considered?

• 9th

• 10th

• 19th

• 20th

Who were the three scientists that considered the possibility of using rockets for space travel?

• Isaac Newton, Albert Einstein and Robert Kraft ford

• Konstantin Tsiolkovsky, Isaac Newton and Nikola Tesla

• Michael Faraday, Louis Pasteur and Robert Hooke

• Konstantin Tsiolkovsky, Robert Goddard, and Wernher von Braun

A rocket is an "action- reaction" engine.

• True

• False

What is Newton's third law of motion?

• The applied force F equals a constant k times the displacement or change in length.

• Forces act in action- reaction pairs that are equal in strength and opposite in direction.

• The time rate of change of the momentum of a body is equal in both magnitude and direction to the force imposed on it.

• If a body is at rest or moving at a constant speed in a straight line, it will remain at rest or keep moving in a straight line at constant speed unless it is acted upon by a force.

What is a chamber?

• A small space inside something (such as a machine or your body).

• A material that is burned to produce heat or power.

• To move something forward.

• A chemical substance produced by a living thing that catalyzes a biochemical reaction.

When does the rocket travels upward against the force of gravity?

• When the fuel is used up.

• When the rocket's fuel is ignited.

You can make a model rocket using antacid tablets.

• True

• False