Life Through a Lens Unit Benchmark
star
star
star
star
star
Last updated about 2 months ago
21 questions
Required
2
With the central heating on, Darcy's living room should be a comfortable 19*C, but the room only reaches 16*C - which is too cold. Darcy realizes that warm air is escaping through a gap underneath the door. She decides to make a device called a DRAFT EXCLUDER ( a fabric tube stuffed with foam) to keep the warm air inside the room and the cold air outside.
Match the variables.
With the central heating on, Darcy's living room should be a comfortable 19*C, but the room only reaches 16*C - which is too cold. Darcy realizes that warm air is escaping through a gap underneath the door. She decides to make a device called a DRAFT EXCLUDER ( a fabric tube stuffed with foam) to keep the warm air inside the room and the cold air outside.
Match the variables.
| Draggable item | arrow_right_alt | Corresponding Item |
|---|---|---|
Thickness of Draft Excluder | arrow_right_alt | Independent Variable |
Temperature of Room | arrow_right_alt | Dependent Variable |
Required
1
Darcy makes two draft excluders using different thicknesses of foam. One is 20mm thick, the other is 40mm thick. She tests the 20mm draft excluder one night and the 40mm draft excluder the next night. She collects the data as seen in the data table.
Which statement below best explains the relationship between the thickness of the draft excluder and energy transfer?
Darcy makes two draft excluders using different thicknesses of foam. One is 20mm thick, the other is 40mm thick. She tests the 20mm draft excluder one night and the 40mm draft excluder the next night. She collects the data as seen in the data table.
Which statement below best explains the relationship between the thickness of the draft excluder and energy transfer?
Required
1
Darcy wants to improve her design to better meet her criteria: her design should not allow temperature in the room to go below 19*C. She cannot create an expensive device. She collects additional data on the costs of different materials. (Seen in image)
Which design improvement could she make to better meet her criteria while also meeting her constraint?
Darcy wants to improve her design to better meet her criteria: her design should not allow temperature in the room to go below 19*C. She cannot create an expensive device. She collects additional data on the costs of different materials. (Seen in image)
Which design improvement could she make to better meet her criteria while also meeting her constraint?
Required
1
Abby sets up an investigation using cold water and hot water. She puts three drops of red food dye in each glass and waits 10 seconds. The results are shown in the image.
Describe the relationship between the temperature of the water and the energy of the water molecules in the system?
Abby sets up an investigation using cold water and hot water. She puts three drops of red food dye in each glass and waits 10 seconds. The results are shown in the image.
Describe the relationship between the temperature of the water and the energy of the water molecules in the system?
Required
3
Ally's car becomes uncomfortably hot during the summer if she can't park in the shade. She wants to design a cover for her windshield to keep the car cool when she has to park it in the sun. She can only spend $10 on materials and has one week to make a prototype.
Drag the blur to the correct box below.
Ally's car becomes uncomfortably hot during the summer if she can't park in the shade. She wants to design a cover for her windshield to keep the car cool when she has to park it in the sun. She can only spend $10 on materials and has one week to make a prototype.
Drag the blur to the correct box below.
- Keeps car interior at a temperature of less than 20*C
- Cost less than $10 to produce
- Time spent on design
- Criteria
- Constraint
Required
5
Ally should use __________ to keep her car cool. Her investigation showed that using different materials __________ the temperature of the car after one hour.
In the investigation, the energy in the kinetic stores of the air particles inside the car changed. The energy in the kinetic store of the air particles changed the MOST when the __________ was used, and the energy in the kenetic store of the air particles changed the LEAST when the __________ was used. This shows that the type of material used __________ temperature.
Required
3
Alyssa investigates what happens when she drops ink on the paper towel that has been dipped in boiling water and on a paper towel that has been dipped in cold water. Her results are shown in the image.
Alyssa claims it is possible to figure out which test used boiling water just by looking at the results of both tests.
Click on the word that best completed the sentences below.
Alyssa investigates what happens when she drops ink on the paper towel that has been dipped in boiling water and on a paper towel that has been dipped in cold water. Her results are shown in the image.
Alyssa claims it is possible to figure out which test used boiling water just by looking at the results of both tests.
Click on the word that best completed the sentences below.
TEST A / TEST B used the boiling water. You can tell this because the ink traveled farther in that investigation. This shows MORE / LESS kinetic energy was transferred from the hot water to the ink. The higher the temperature of the water the GREATER / LOWER the transfer of energy to the ink and the farther the ink will travel.
Required
1
A company decides to design a lunch box that keeps food cold for students with long bus rides.
The criteria: Keeps food at temperature of less than 4*C
The constraint: Costs less than $6 per box to produce
The designers line three boxes with different amounts of material to determine which is the most effective at reducing energy transfer.
They test the designs by putting a frozen ice pack inside each lunch box along with a thermometer. All of the lunch boxes are placed in a temperature-controlled room at 16*C. An hour later the temperature inside each lunch box is recorded. The results are shown in the image.
Which design best meets the criteria?
A company decides to design a lunch box that keeps food cold for students with long bus rides.
The criteria: Keeps food at temperature of less than 4*C
The constraint: Costs less than $6 per box to produce
The designers line three boxes with different amounts of material to determine which is the most effective at reducing energy transfer.
They test the designs by putting a frozen ice pack inside each lunch box along with a thermometer. All of the lunch boxes are placed in a temperature-controlled room at 16*C. An hour later the temperature inside each lunch box is recorded. The results are shown in the image.
Which design best meets the criteria?
Required
1
What is the criteria?
What is the criteria?
Required
1
What is the constraint?
What is the constraint?
The first design decision you make is choosing which material to use for the floor above the tubes. You decide to test how two different materials affect the temperature.
Required
1
What is the independent variable?
What is the independent variable?
Required
1
What is the dependent variable?
What is the dependent variable?
Required
1
You set up your experiment so there is a tube under each of the two different floor materials. You run hot water under each floor material for 1 hour. The results are shown in the image.
Explain how the results from the investigation show that there is a relationship between the temperature and the types of floor materials.
You set up your experiment so there is a tube under each of the two different floor materials. You run hot water under each floor material for 1 hour. The results are shown in the image.
Explain how the results from the investigation show that there is a relationship between the temperature and the types of floor materials.
Another design decision you make is choosing the thickness of the floor material above the water-heated tubes. You decide to test two different thickness of each floor material to help you figure out which is best to use in your heating system.
Required
1
What is the independent variable?
What is the independent variable?
Required
1
What is the dependent variable?
What is the dependent variable?
Required
1
How does the data from the investigation show that there is a relationship between temperature and thickness of the material?
How does the data from the investigation show that there is a relationship between temperature and thickness of the material?
You are now ready to design a heating system that allows the greatest transfer of energy as quickly as possible!
Required
2
Would you choose tile or carpet? Why?
Would you choose tile or carpet? Why?
Required
2
Which thickness (5mm/10mm/20mm) would you choose? Why?
Which thickness (5mm/10mm/20mm) would you choose? Why?
Required
1
Label the diagram with ARROWS to show how energy is transferred into and through your heating system.
Label the diagram with ARROWS to show how energy is transferred into and through your heating system.
Required
1
Use the model above to describe how the transfer of energy between parts of the heating system leads to an increase in room temperature. (Include ideas of conduction and convection.)
Use the model above to describe how the transfer of energy between parts of the heating system leads to an increase in room temperature. (Include ideas of conduction and convection.)
Required
1
The room is warming up. You want to know whether the temperature is actually increasing because of the radiant floor heating or the sunlight coming in from the windows.
How can you tell whether heat is coming from the radiant floor heating system? Explain your answer.
The room is warming up. You want to know whether the temperature is actually increasing because of the radiant floor heating or the sunlight coming in from the windows.
How can you tell whether heat is coming from the radiant floor heating system? Explain your answer.