Designing Energy Systems
Reliability of Evidence
Electric Circuits and Currents
Non-Touching Forces
Temperature and Energy
100
Explain the type of energy conversion a generator performs.
Kinetic to electric energy.
100
Your friend's dad says his friend's MAP APP is better than Google Maps because of its enhanced geographic updating system, and traffic density algorithm.
What are some incentives and motives your friend's dad may have in making this claim about his friend's MAP APP?
Your friend's dad may work for MAP APP.
Your friend's dad wants to see his friend make money.
Your friend's dad genuinely does like MAP APP better than Google Maps.
100
A student is connecting their lightbulb and battery system to a popsicle stick. The student has formed this system in a loop, but the lightbulb is not turning on. Why not?
The popsicle stick is not a good conductor for electricity.
100
List one variable affecting the strength of magnetic forces.
Size of magnet, Strength of magnet, How close the magnet is to the object, Whether there is anything between the magnet and the other object
100
Using the key for the modeling tool for temperature and molecule speed (below), draw a molecular model with 5-6 molecules representing the cold water and hot water on your whiteboard:
Cold Water: Model shows low temperature and molecules with slower speed
Hot Water: Model shows high temperature and molecules with faster speed
200
Detail each type of energy conversion and transfer in the following system:
1) Hand Crank
2) Battery
3) Flashlight
Hand Crank takes human kinetic energy, transferred to electrical energy.
Electrical energy is converted to and stored as chemical potential energy in the battery.
The potential energy is then converted back to electrical energy and last, light energy from the flashlight.
200
Verizon claims to be the best wireless network. They have shown a map of their coverage compared to T-Mobile in their commercial. How reliable is the coverage map as evidence supporting the claim that they are the best wireless network?
Somewhat to not reliable.
Verizon stands to profit from convincing people they are better than T-Mobile, so they can not be fully trusted with their evidence.
200
What do the arrows represent in this system?
Electric current
200
Which of the following statements about the strength of non-touching forces and distances between objects is true?
a. Distance does not affect the strength of non-touching forces.
b. Non-touching forces have the same strength from all distances.
c. The strength of non-touching forces decreases as the distance between the objects decreases.
d. The strength of non-touching forces increases as the distance between the objects decreases.
d. The strength of non-touching forces increases as the distance between the objects decreases.
200
The figure above displays hot water and cold water on the macroscale, with food dye placed in it to demonstrate molecular movement. Using the key below, circle the letter of the molecular model that best represents the hot and cold water.
B
300
List two advantages of models in science.
Models can help us organize our ideas before fully constructing the real system.
Models can offer us a visual representation of something that may be hard to see in real life (ie. molecules).
300
The Ed-You Swivel Chair is developed by Ed-You-Energy. The company claims the Ed-You-Swivel chairs will capture enough energy to power the school’s small electronics. Consider the following two claims:
Claim 1: The Ed-You-Swivel chairs will capture enough energy to power the school’s small electronics.
Claim 2: The Ed-You-Swivel chairs will NOT capture enough energy to power the school’s small electronics.
Which claim does this piece of evidence below support and how reliable is the evidence?
The Ed-You-Swivel developers state that the product can save schools money.
Claim 1
Somewhat reliable to not reliable at all because it is directly from the company which will profit if they sell more chairs.
300
________ energy in the battery is converted to ________ energy and transferred by the ________. It then converts to ________ energy when it reaches the lightbulb.
a. potential….electrical….current….light
b. potential….electrical….circuit….light
c. potential….light….current….electrical
d. kinetic….light….current….electrical
a. potential….electrical….current….light
300
The following non-touching forces have both the forces of attraction and repulsion:
a. Magnetic force only
b. Magnetic and Electrostatic force
c. Magnetic, Electrostatic, and Gravitational force
d. Gravitational force only
b. Magnetic and Electrostatic force
300
The diagrams above show things made of molecules moving at different speeds. Each molecule is represented by a circle, and the speed of each molecule is indicated by the number in the circle.
What can you tell about the temperature of the things in these diagrams by calculating the average speed of the molecules (circle the correct letter)?
a. The thing in Diagram 1 has a higher temperature than the thing in Diagram 2.
b. The thing in Diagram 2 has a higher temperature than the thing in Diagram 1.
c. The thing in both diagrams have the same temperature.
d. The thing in Diagram 1 has a higher average kinetic energy than the thing in Diagram 2.
Both have an average speed of 3.
c. The thing in both diagrams have the same temperature.
400
List two limitations of models in science.
Models are not actually working, therefore only a representation of real life.
Models do not show us the full size or true amount of things.
400
The Ed-You Swivel Chair is developed by Ed-You-Energy. The company claims the Ed-You-Swivel chairs will capture enough energy to power the school’s small electronics. Consider the following two claims:
Claim 1: The Ed-You-Swivel chairs will capture enough energy to power the school’s small electronics.
Claim 2: The Ed-You-Swivel chairs will NOT capture enough energy to power the school’s small electronics.
Which claim does this piece of evidence below support and how reliable is the evidence?
A commercial paid for by Ed-You-Energy says that the Ed-You-Swivel “creates” enough energy to power an entire school.
Claim 1
Somewhat reliable to not reliable at all because it is directly from the company which will profit if they sell more chairs.
400
Fill in the blanks with the correct multiple choice answer.
An electric ________ is the way that electrical energy is transferred from one place to another, and an electric ________ is a closed path in which an electric ________ can exist.
a. circuit….current….circuit
b. current….circuit….current
c. current….current….circuit
d. circuit...circuit...current
b. current….circuit….current
400
Which of the following statements is true?
a. Magnetic force occurs between a magnet and other magnet or objects made of certain metals, electrostatic force occurs between objects with an electric charge, and the force of gravity occurs between all objects, we just do not always see the affects of the gravitational force.
b. Magnetic force occurs between a magnet and other magnet or objects made of certain metals, electrostatic force occurs between objects with an electric charge, and the force of gravity only occurs from large objects.
c. Magnetic force occurs between a objects with an electric charge, electrostatic force occurs between magnet and other magnet or objects made of certain metals, and the force of gravity occurs between all objects, we just do not always see the affects of the gravitational force.
d. Magnetic force occurs between objects with an electric charge, electrostatic force occurs between magnet and other magnet or objects made of certain metals, and the force of gravity only occurs from large objects.
a. Magnetic force occurs between a magnet and other magnet or objects made of certain metals, electrostatic force occurs between objects with an electric charge, and the force of gravity occurs between all objects, we just do not always see the affects of the gravitational force.
400
The figure above shows the simulation for Sample A and Sample B at 108 seconds.
Complete the following statement using the figure above.
Once the energy stopped transferring, the molecules of Sample A had __________________ the molecules of Sample B.
a. more kinetic energy, a higher average kinetic energy, and a higher temperature than
b. less kinetic energy, a lower average kinetic energy, and a lower temperature than
c. more kinetic energy, a lower average kinetic energy, and a higher temperature than
d. the same kinetic energy , the same average kinetic energy, and the same temperature as
d. the same kinetic energy , the same average kinetic energy, and the same temperature as
500
You created a physical model of an energy capturing system. Which of the following statements was true?
a. The physical model really captured kinetic energy, which was converted to electrical energy by the generator, and stored as potential energy in the battery.
b. The physical model really captured potential energy, which was converted to electrical energy by the generator, and stored as kinetic energy in the battery.
c. The physical model represented a system that captures kinetic energy, which was converted to electrical energy by the generator, and stored as potential energy in the battery.
d. The physical model represented a system that captures potential energy, which was converted to electrical energy by the generator, and stored as kinetic energy in the battery.
c. The physical model represented a system that captures kinetic energy, which was converted to electrical energy by the generator, and stored as potential energy in the battery.
500
The Ed-You Swivel Chair is developed by Ed-You-Energy. The company claims the Ed-You-Swivel chairs will capture enough energy to power the school’s small electronics. Consider the following two claims:
Claim 1: The Ed-You-Swivel chairs will capture enough energy to power the school’s small electronics.
Claim 2: The Ed-You-Swivel chairs will NOT capture enough energy to power the school’s small electronics.
Which claim does this piece of evidence below support and how reliable is the evidence?
Engineers at Product Testing Lab, Inc. found that the Ed-You-Swivel harnesses 4,000 joules in one day of typical use. It would take an Ed-You-Swivel 20 days to charge one tablet. Product Testing Lab, Inc. is a company used by many businesses, schools, and government agencies to make choices about what to buy.
Claim 2
Somewhat reliable to very reliable because it is a company which appears to be independent of Ed-You and is used by any businesses, schools, and government agencies.
500
Draw a quick sketch of how wires would need to be connected to make the lightbulb turn on using the following items:
The sketch should include all three items connected in a loop.
A working circuit required a closed loop system.
500
The figure above displays a model of Earth’s gravitational fields. Which of the following statements about the model of the gravitational field is true?
a. The gravitational fields have set amounts of strength for each level.
b. The gravitational fields show the attractive gravitational force with set amounts of strength for each level.
c. The gravitational fields display the repulsive gravitational force.
d. The gravitational fields gradually change in strength even though they are shown as different levels in this model.
d. The gravitational fields gradually change in strength even though they are shown as different levels in this model.
500
Starting thermal energy before the samples came into contact (kJ)
Sample A = 225 kJ
Sample B = 5 kJ
Final thermal energy after the samples came into contact (kJ)
Sample A = 115 kJ
Sample B = 115 kJ
Using the information above,
i) describe the speed of the molecules, kinetic energy, and temperature of Sample A and B, both before and after the samples came into contact.
ii) Also, explain how energy is transferred between the samples and why the transfer of energy between the two samples stopped.
iii) Last, explain how the information in the table supports the following claim:
CLAIM: Energy is never created or destroyed.
Before coming into contact, Sample A had faster molecules, higher kinetic energy, and a higher temperature than Sample B. After coming into contact, the molecules of Sample A and B have the same speed, same kinetic energy, and same temperature. The transfer of energy occurs when fast moving molecules collide with slow moving molecules and stops when both samples reach the same speed, or when one sample is no longer hotter than the other. The table supports the claim because the total thermal energy in the system at the start is 230 kJ, and after is still 230 kJ.