book 3 part 1

What helps a car engine create movement?

• Water flowing through pipes
• Magnets spinning inside wheels
• Wires pulling each piston
• Fuel burning in small chambers
• Air moving through large fans

What kind of fuel do most internal combustion engines use?

• Gas cooled to liquid form
• Batteries charged by sunlight
• Wires connected to motors
• Oil-based chemical fuels
• Power from wind turbines

What made electric cars disappear for many years?

• They needed special helmets
• They were louder than trains
• They had short battery life
• They ran too slowly uphill
• They couldn’t fit into parking spots

What was one fun fact about the Wankel engine?

• It runs without wheels
• It powers big ocean ships
• It spins a triangle in a circle
• It uses square metal blocks
• It cools the engine using oil

What problem do continuous combustion engines have in cars?

• They work best with cold air
• They spin only in one direction
• They use too much fuel
• They must stay turned off in traffic
• They overheat when turning

Who would most likely choose a hydrogen-powered car today?

• A person wanting clean travel
• A driver who enjoys loud engines
• A child riding a toy car
• A racer using diesel fuel
• A person avoiding sunlight

When are rotary engines most likely used?

• In large grocery trucks
• In long passenger trains
• In sleek sports vehicles
• In quiet farm tractors
• In slow delivery drones

What kind of engine would most likely be found in airplanes?

• Fan-based ceiling motor
• Reciprocating piston engine
• High-speed turbine engine
• Solar-powered bike engine
• Tiny hand-spun rotor

If cars used heat from the sun only, what engine type might be best?

• Solar-driven heat engine
• Biofuel piston engine
• Cold-air Otto engine
• Rain-cooled diesel engine
• Fast-burning gas motor

What could you compare the four-stroke cycle to?

• A bouncing ball in water
• A deep breath in and out
• A rocket flying sideways
• A hammer hitting slowly
• A light blinking off