1. The two metals have opposite charges.
2. combustion
3. composite
4. Oxygen and gasoline are compressed in the engine, and a spark plug ignites the fuel.
5. copper
6. In an internal combustion engine, combustion takes place inside the engine and in an external combustion engine, combustion takes place outside the engine.
7. maritime
8. when there is chemical reaction between metals and nonmetals
9. Metal pots and pans can conduct heat from the stove or oven through the container and into the food being cooked.
10. control
11. air
12. Yes, it would. Aluminum is a conductor, and the glass would prevent electricity from transferring to a person holding the device.
13. They transfer thermal energy due to convection.
14. current
15. the foundation
The Design World Unit Test
1,Which statement is true about the two metals used in batteries?
The two metals have opposite charges.
The two metals are not reactive to chemicals inside the battery.
The two metals are the same.
The two metals restrict the flow of electrons.
Engines work by converting chemical energy into mechanical energy. What process do they use to do this?
suspension
propulsion
rotation
combustion
Plywood is made by gluing together thin layers of wood. Which term best describes plywood?
raw material
composite
conductor
natural
How does combustion occur in a gas engine of a car?
Oxygen and gasoline are compressed in the engine, and a spark plug ignites the fuel.
Carbon dioxide and gasoline are compressed in the engine, and the fuel spontaneously ignites.
Oxygen and gasoline are compressed in the engine, and the fuel spontaneously ignites.
Carbon dioxide and gasoline are compressed in the engine, and a spark plug ignites the fuel.
An engineer is designing a component of a product. The component is responsible for carrying electric current from one part of the product to another.
Which material would be a suitable choice for the component?
rubber
copper
glass
plastic
What is the difference between an internal combustion engine and external combustion engine?
In an internal combustion engine, combustion takes place inside the engine and in an external combustion engine, combustion takes place outside the engine.
In an internal combustion engine, combustion takes place in an special chamber such as a boiler and in an external combustion engine, combustion takes place in the engine.
In an internal combustion engine, combustion takes place outside the engine and in an external combustion engine, combustion takes place inside the engine.
In an internal combustion engine, combustion takes place in a special chamber connected to the engine and in an external combustion engine, combustion takes place in a special chamber that is not connected to the engine.
Which type of transportation system is best for moving a large amount and wide variety of goods?
maritime
air
rail
road
When would a transformation of chemical energy to electrical energy occur?
when electrons stop moving between atoms
when the current becomes zero
when there is chemical reaction between metals and nonmetals
when a reaction produces the same products
Why are most pots and pans that are used for cooking made out of metal?
Metal pots and pans can conduct heat from the stove or oven through the container and into the food being cooked.
Metal pots and pans can conduct heat away from the food being cooked preventing it from burning.
Metal pots and pans can conduct a lower number of electric particles allowing the food to cook evenly.
Metal pots and pans insulate the food being cooked and keeps it from burning.
The gas pedal belongs to which subsystem of an automobile?
control
suspension
guidance
transmission
Which mode of transportation is best for ensuring fastest delivery?
maritime
road
air
rail
Aluminum allows for the flow of electrons, while glass does not. Would an aluminum wire surrounded by glass be an effective design for a device that will need to carry an electric current?
No, it would not. Both aluminum and glass are insulators, so the device would not carry a current.
No, it would not. Both aluminum and glass are conductors, so the current would be exposed to outside elements.
Yes, it would. The glass would carry the current, while aluminum is an insulator.
Yes, it would. Aluminum is a conductor, and the glass would prevent electricity from transferring to a person holding the device.
13.
In a building, air moves due to currents caused by temperature differences. Which statement best describes these currents?
They transfer thermal energy due to radiation.
They transfer thermal energy due to convection.
They transfer electrical energy due to convection.
They transfer electrical energy due to conduction.
Which term refers to the rate of electricity passing through a circuit?
conductivity
voltage
current
electron
15.
An architect is designing an office building in an area that can experience earthquakes.
Which component would it be most important to strengthen in order to allow the building to withstand the additional forces exerted during an earthquake?
the foundation
the electrical system
the doors
the windows
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