Cars
Why are cars tested before delivered?`
To make sure they are safe.
All train tracks around the world are the same size? For example, the distance between the rails is the same. TRUE or FALSE
FALSE
What are 3 different kinds of ships?
Sail
Cargo
Submarine
What are 3 ways to travel through the sky?
Airplane
Helicopter
Glider
Hot air balloon
Rocket
Why do rockets have multiple stages?
To be more efficient. Releasing stages as they are used up means less fuel is required to reach their destination.
What are 2 ways that cars are tested to ensure they are safe?
Weather tests
Tire tests
Crash tests
Emissions tests
Wind tunnel tests
What do locomotives do?
Push or pull a train.
What is a canal?
Narrow man-made rivers.
A propeller is rotating wing.
TRUE or FALSE
TRUE
What two things do liquid rockets need for combustion?
Fuel + oxidizer
Where are the batteries in most electric cars?
On the bottom, underneath.
What are 3 different ways to power a locomotive?
Coal fire
Wood fire
Electric
The earliest ships were made from what?
Wood
Who invented the airplane?
Orville and Wilbur Wright.
What causes a spacecraft (or an asteroid) to heat up when entering the atmosphere?
Air friction.
Where is the gas stored at gas stations?
Underground tanks.
Underground trains are called what?
Subways
What is a paddleboat?
A boat with rotating paddles that is powered by an engine.
What was the Hindenburg?
Famous airship that exploded.
Why are crewed spacecraft more expensive than uncrewed spacecraft?
Crewed spacecraft need a lot more features to keep a person alive: food, water, toilet, radiation protection, manual controls.
Gas is made from what?
Oil
Why are subways more expensive than above ground trains?
Tunnels and underground train stations are expensive to build and maintain.
What is the difference between a cargo ship and a ferry?
A cargo ship carries lots of cargo across the ocean. A ferry carries people and cargo short distances like across a lake.
An air traffic controller is in charge of telling planes where to fly and where to taxi on the ground. TRUE or FALSE
TRUE
How did the space shuttle work?
It was launched with extra solid rocket boosters and returned to earth as a glider.