1. Plywood is made by gluing together thin layers of wood. Which term best describes plywood? (1 point)

Question

Responses

natural
natural

raw material
raw material

composite
composite

conductor
conductor
2. An engineer is designing a component of a product. The component carries electric current from one part of the product to another. Which material would be a suitable choice for the component? (1 point)
Responses

copper
copper

rubber
rubber

plastic
plastic

glass
glass
3. Which term refers to the rate of electricity passing through a circuit? (1 point)
Responses

current
current

conductivity
conductivity

electron
electron

voltage
4. Why would a person feel cooler wearing a white shirt rather than a black shirt on a sunny day? (1 point)
Responses

Light would be mostly transmitted rather than absorbed or reflected.
Light would be mostly transmitted rather than absorbed or reflected.

Light would be mostly absorbed or transmitted rather than reflected.
Light would be mostly absorbed or transmitted rather than reflected.

Light would be mostly absorbed or reflected rather than transmitted.
Light would be mostly absorbed or reflected rather than transmitted.

Light would be mostly reflected rather than absorbed or transmitted.
Light would be mostly reflected rather than absorbed or transmitted.
5. Which type of transportation system is best for moving a large amount and wide variety of goods? (1 point)
Responses

maritime
maritime

road
road

air
air

rail
rail
6. Which mode of transportation is best for ensuring the fastest delivery? (1 point)
Responses

maritime
maritime

road
road

air
air

rail
7. How does combustion occur in a gas engine of a car? (1 point)
Responses

Oxygen 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.

Oxygen and gasoline are compressed in the engine, and a spark plug ignites the fuel.
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.
Carbon dioxide 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.
Carbon dioxide and gasoline are compressed in the engine, and a spark plug ignites the fuel.
8. The gas pedal belongs to which subsystem of an automobile? (1 point)
Responses

control
control

suspension
suspension

guidance
guidance

transmission
9. Why are metals used within most electronic devices and wires? In three to five sentences, apply your knowledge of conductivity to explain.
10. Red tape can be used to repair a broken taillight on a car. In one or two sentences, explain how different colors of light are transmitted, reflected, and absorbed by this kind of tape. (2 points)
11. You want to make a photo album for your friend. In three to five sentences, describe at least one advantage and one disadvantage of choosing a digital photo album rather than a physical one. Analyze a potential solution to the disadvantage. (4 points)
12. In three to five sentences, identify two components of the control subsystem of a vehicle, and use them to explain why driving can be hazardous when the control subsystem is not functioning properly. (4 points)

Answer 1

9. Metals are used within most electronic devices and wires because they have high conductivity, which allows for the easy flow of electricity. When a voltage is applied to a metal, it causes the free electrons in the metal to move, creating a flow of current. This is why most wires are made of copper or aluminum, which are both highly conductive metals. Additionally, metals are also strong and durable, making them ideal for use in electronic devices that need to withstand a lot of use.

10. Red tape can be used to repair a broken taillight on a car because it is capable of transmitting and reflecting red light. When light hits the tape, some of it is absorbed, but the rest is transmitted, or allowed to pass through, the tape. The red color of the tape is created by the way it absorbs and reflects light. Red light is absorbed by the tape, while other colors are reflected back out. This results in the appearance of a red color to anyone looking at the tape.

11. One advantage of choosing a digital photo album is that it can be easily shared and accessed by many people at once, without the need for physical distribution. However, a disadvantage is that it can be lost if the digital files are not backed up properly or if the device holding the files is damaged. A potential solution to this disadvantage is to upload the files to an online storage platform or cloud service for safekeeping.

12. Two components of the control subsystem of a vehicle are the steering system and the braking system. When either of these components is not functioning properly, it can result in hazardous driving conditions. For example, if the steering system fails, the driver may not be able to steer the car properly, which can lead to accidents. Similarly, if the braking system fails, the driver may not be able to stop the car in time to avoid an accident. In both cases, regular maintenance and inspection of these components can help ensure that they are functioning properly, reducing the risk of accidents while driving.