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
PLS ANSWER <3
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
1. The statement that is true about the two metals used in batteries is that the two metals have opposite charges. They're like polar opposites...literally!
2. Engines work by converting chemical energy into mechanical energy through the process of combustion. It's like setting fire to a really efficient hamster wheel.
3. Plywood is best described as a composite material. It's like a fancy sandwich made of wood layers, held together by glue. Delicious and sturdy!
4. 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. It's like a fiery party in the engine!
5. For carrying electric current from one part of a product to another, copper would be a suitable choice for the component. It's like the electric version of a highway!
6. The difference between an internal combustion engine and an external combustion engine is that in an internal combustion engine, combustion takes place inside the engine, while in an external combustion engine, combustion takes place outside the engine. It's like having an explosive party inside vs. outside your car's engine!
7. The best transportation system for moving a large amount and wide variety of goods is maritime transportation. It's like having a whole fleet of boats to carry anything and everything!
8. A transformation of chemical energy to electrical energy occurs when there is a chemical reaction between metals and nonmetals. It's like a little dance party between atoms!
9. Most pots and pans that are used for cooking are made out of metal because metal pots and pans can conduct heat from the stove or oven through the container and into the food being cooked. It's like metal magic that makes your food deliciously hot!
10. The gas pedal belongs to the control subsystem of an automobile. It's like the ultimate power button for speed!
11. The fastest delivery can be ensured by using air transportation. It's like strapping your package to a jet and soaring through the skies!
12. An aluminum wire surrounded by glass would not be an effective design for a device that needs to carry an electric current. Sorry, but glass doesn't play well with electricity!
13. In a building, air moves due to currents caused by temperature differences. These currents best describe convection, as they transfer thermal energy through the movement of air. It's like a dance party for heat!
14. The rate of electricity passing through a circuit is referred to as current. It's like the speedy flow of electric particles!
15. In order to allow a building to withstand the additional forces exerted during an earthquake, it would be most important to strengthen the foundation. It's like giving the building a solid "earthquake-proof" hug!
I hope that helps! Keep being curious and asking great questions! <3
1. The statement that is true about the two metals used in batteries is: The two metals have opposite charges.
2. Engines work by converting chemical energy into mechanical energy. The process they use to do this is: combustion.
3. Plywood is made by gluing together thin layers of wood. The term that best describes plywood is: composite.
4. Combustion in a gas engine of a car occurs when: Oxygen and gasoline are compressed in the engine, and a spark plug ignites the fuel.
5. For an engineer designing a component responsible for carrying electric current, a suitable choice of material would be: copper.
6. The difference between an internal combustion engine and an external combustion engine is: In an internal combustion engine, combustion takes place inside the engine, while in an external combustion engine, combustion takes place outside the engine.
7. The best type of transportation system for moving a large amount and wide variety of goods is: maritime.
8. A transformation of chemical energy to electrical energy occurs when: there is a chemical reaction between metals and nonmetals.
9. Most pots and pans used for cooking are made out of metal because: Metal pots and pans can conduct heat from the stove or oven through the container and into the food being cooked.
10. The gas pedal belongs to the control subsystem of an automobile.
11. The mode of transportation that is best for ensuring the fastest delivery is: air.
12. Aluminum allows for the flow of electrons, while glass does not. An aluminum wire surrounded by glass would not be an effective design for a device that needs to carry an electric current.
13. In a building, air moves due to currents caused by temperature differences. These currents best transfer thermal energy due to: convection.
14. The term that refers to the rate of electricity passing through a circuit is: current.
15. In an office building designed in an earthquake-prone area, it would be most important to strengthen the foundation to allow the building to withstand the additional forces exerted during an earthquake.
1. To answer this question, you need to understand the properties and function of metals in batteries. The correct statement is "The two metals have opposite charges." This is because batteries operate based on a chemical reaction between two different metals, known as the anode and cathode, which have opposite charges. This creates a flow of electrons, generating an electric current.
2. The process that engines use to convert chemical energy into mechanical energy is combustion. Combustion is the rapid chemical reaction between a fuel (such as gasoline) and oxygen, resulting in the release of energy in the form of heat, which is then converted into mechanical energy to move the various components of the engine.
3. Plywood is best described as a composite material. This is because it is made by gluing together thin layers or veneers of wood, usually with the grain of each layer oriented perpendicular to the adjacent layers. This construction provides plywood with enhanced strength, stability, and resistance to warping or splitting, making it suitable for various applications in construction, furniture-making, and other industries.
4. 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. The compressed mixture of fuel and air creates a highly combustible environment, and when the spark plug generates a spark, it triggers the combustion reaction, causing the fuel to rapidly burn and release energy, which is harnessed to power the engine.
5. For a component that needs to carry electric current, a suitable material choice would be copper. Copper is known for its excellent electrical conductivity, which makes it an ideal choice for conducting electric current. Its low resistance allows for efficient flow of electrons, minimizing energy loss and ensuring that electric current can be effectively carried from one part of the product to another.
6. The difference between an internal combustion engine and an external combustion engine lies in where the combustion process takes place. In an internal combustion engine, combustion occurs inside the engine itself, typically in a combustion chamber. On the other hand, an external combustion engine, such as a steam engine or Stirling engine, has combustion taking place outside the main engine, often in a separate boiler or heat source. This distinction determines the overall design and operation of the engines.
7. For moving a large amount and wide variety of goods, the best transportation system would be maritime transportation. Maritime transportation, which involves the use of ships and vessels, is well-suited for carrying bulk cargo, such as containers or raw materials, over long distances. It provides the capacity to transport a large volume of goods and is capable of accommodating various types of cargo, including oversized or heavy items.
8. A transformation of chemical energy to electrical energy would occur when there is a chemical reaction between metals and nonmetals. This reaction, known as an electrochemical reaction, takes place in devices like batteries or fuel cells. Chemical energy is converted into electrical energy as a result of the movement of charged particles (ions or electrons) during the chemical reaction.
9. Most pots and pans used for cooking are made out of metal because metal has the ability to conduct heat efficiently. Metal pots and pans can transfer heat from the stove or oven through the container and into the food being cooked, ensuring more even and efficient cooking. Additionally, metals can withstand high temperatures and are durable, making them suitable for cooking applications.
10. The gas pedal belongs to the control subsystem of an automobile. The control subsystem consists of various components that allow the driver to control and regulate the vehicle's speed, direction, and other functions. The gas pedal, specifically, is responsible for controlling the vehicle's acceleration by regulating the amount of fuel entering the engine.
11. For ensuring the fastest delivery, air transportation is typically the best mode of transportation. Air transport offers the advantage of high speed over long distances, allowing for quick and efficient delivery of goods. It is particularly suitable for urgent or time-sensitive shipments, such as perishable goods or express delivery services.
12. An aluminum wire surrounded by glass would not be an effective design for a device that needs to carry an electric current. Both aluminum and glass are insulators, meaning they do not allow the flow of electric current. In order for the device to effectively carry a current, a suitable conductor, such as copper, would need to be used instead of glass.
13. The currents in a building caused by temperature differences best describe thermal energy transfer due to convection. Convection is the movement of fluid or air (in this case, the air inside the building) due to temperature differences. Hot air rises, creating upward currents, while cooler air sinks, causing downward currents. This convection flow facilitates the transfer of thermal energy throughout the building.
14. The term that refers to the rate of electricity passing through a circuit is current. Electric current is the flow of electric charge, typically carried by electrons, in a circuit. It is measured in units called amperes (A) and represents the rate at which charge carriers pass through a specific point in a circuit.
15. In order to allow a building to withstand the additional forces exerted during an earthquake, it would be most important to strengthen the foundation. The foundation of a building provides the structural support and stability necessary to withstand external forces, including those generated by earthquakes. Reinforcing the foundation through proper design and construction techniques is crucial for ensuring the overall structural integrity and safety of the building during seismic events.