Recommendation for individuals using a screenreader: please set your punctuation settings to "most."
Descriptive Statements:
- Apply knowledge of various forms of energy and transformations from one form to another.
- Apply the concept of work to analyze kinetic, gravitational potential, and elastic potential energy, and analyze energy transformations involving the conservation of energy.
- Apply knowledge of power to solve problems involving rates of energy transfer and related applications.
- Apply knowledge of the use of science and engineering practices in exploring and understanding content related to energy and power, such as developing and using models, planning and safely conducting investigations, applying mathematical concepts, and communicating and evaluating data and conclusions.
Sample Item:
A lighting system consists of a solar photovoltaic (PVP V) panel, a battery, and a light-emitting diode (LEDL E D). The system has a solid-state circuit so that the battery charges during the day when the Sun is out and turns on the LEDL E D at night. Assuming an ideal system, which of the following sequences best represents the major energy transformations that occur in this system?
- thermal → chemical → electric → magnetic → electromagneticthermal transforms into chemical transforms into electrical transforms into magnetic transforms into electromagnetic
- thermal → electric → chemical → electric → electromagneticthermal transforms into electric transforms into chemical transforms into electric transforms into electromagnetic
- electromagnetic → chemical → magnetic → electric → electromagneticelectromagnetic transforms into chemical transforms into magnetic transforms into electric transforms into electromagnetic
- electromagnetic → electric → chemical → electric → electromagneticelectromagnetic transforms into electric transforms into chemical transforms into electric transforms into electromagnetic
Correct Response and Explanation (Show Correct ResponseHide Correct Response)
Correct Response: D.
Descriptive Statements:
- Demonstrate knowledge of energy, temperature, and heat on the macroscopic and microscopic scales.
- Apply knowledge of the first law of thermodynamics to analyze energy transfers within closed and open systems.
- Apply knowledge of entropy and the second law of thermodynamics in a closed system.
- Apply knowledge of thermodynamic principles to analyze situations involving heat, temperature changes, thermal expansion, specific heat, latent heat, and phase changes.
- Apply knowledge of the use of science and engineering practices in exploring and understanding content related to thermodynamics, such as developing and using models, planning and safely conducting investigations, applying mathematical concepts, and communicating and evaluating data and conclusions.
Sample Item:
During a unit on thermodynamics, the teacher asks students to consider how much ice a 5-gallon bucket of water at 120°F (49°C) could melt compared to 1 cup of water at 120°F (49°C). This question is most appropriate for introducing students to which of the following concepts?
- the difference between heat and temperature
- the operation of a reversible heat engine
- the difference between energy and entropy
- the thermodynamic work done by a system
Correct Response and Explanation (Show Correct ResponseHide Correct Response)
Correct Response: A.
View Cart