1. Plywood is made by gluing together thin layers of wood. Which term best describes plywood? (1 point)
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)
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.
1. The term that best describes plywood is "composite." Plywood is made by gluing together thin layers of wood, which makes it a composite material.
2. The suitable choice of material for a component that carries electric current would be "copper." Copper is a good conductor of electricity and is commonly used in electrical components.
3. The term that refers to the rate of electricity passing through a circuit is "current." Current is measured in amperes (A) and represents the flow of electric charge.
4. A person would feel cooler wearing a white shirt rather than a black shirt on a sunny day because "light would be mostly reflected rather than absorbed or transmitted." White objects reflect most of the light that falls on them, while black objects absorb most of the light. Therefore, a white shirt would reflect more sunlight and heat, keeping the person cooler.
5. The type of transportation system that is best for moving a large amount and wide variety of goods is "maritime." Maritime transportation, which includes ships and boats, is capable of carrying large quantities of goods across long distances and is suitable for transporting various types of cargo.
6. The mode of transportation that is best for ensuring the fastest delivery is "air." Air transportation, such as airplanes, allows for quick and efficient movement of goods due to its high speed and ability to bypass traffic and geographical barriers.
7. Combustion occurs in a gas engine of a car when "oxygen and gasoline are compressed in the engine, and a spark plug ignites the fuel." In a typical gas engine, fuel (gasoline) and air (oxygen) are mixed together in the engine cylinder, which creates a highly flammable mixture. This mixture is then compressed by the piston, and when sparked by the spark plug, it ignites and generates a controlled explosion, resulting in the combustion process.
8. The gas pedal belongs to the "control" subsystem of an automobile. The control subsystem includes components that enable the driver to control the vehicle's speed, acceleration, and braking. The gas pedal controls the throttle, which regulates the amount of fuel and air mixture entering the engine, thus controlling the vehicle's speed.
9. Metals are used within most electronic devices and wires because they have high conductivity. This means that they allow electric current to flow easily through them. Metals, such as copper and aluminum, have many free electrons that can move freely in response to an electric field, facilitating the movement of electric charges. This property of metals makes them ideal for conducting electricity and transferring signals within electronic devices.
10. Different colors of light are transmitted, reflected, and absorbed differently by red tape. Red light is primarily transmitted and reflected by red tape, while other colors of light are absorbed. This is because red tape absorbs all colors of light except for red, which it reflects and transmits. As a result, when red tape is used to repair a broken taillight on a car, it allows red light to pass through, maintaining the red color of the taillight.
11. One advantage of choosing a digital photo album over a physical one is that it allows for easy storage and organization of a large number of photos. Digital albums can also be easily shared and accessed online. However, a disadvantage is that digital albums rely on electronic devices and can be susceptible to data loss or technical malfunctions. A potential solution to this is regularly backing up the digital album to multiple storage devices or online platforms to prevent the loss of photos.
12. Two components of the control subsystem of a vehicle are the steering system and the braking system. The steering system allows the driver to control the direction of the vehicle, while the braking system enables the driver to slow down or stop the vehicle. When the control subsystem is not functioning properly, driving can be hazardous. For example, if the steering system malfunctions, the driver may lose control of the vehicle and be unable to steer properly, leading to accidents. Similarly, if the braking system fails, the driver may not be able to stop the vehicle efficiently, increasing the risk of collisions.