Download Energy Transfers

Scoring Rubric for Energy Transfers
Heating Soil and Water – Catastrophic Events Lesson 3
Value
Points
Performance Description
A 2-point response demonstrates the student understands the Standard 6-8 PS3A:
Energy exists in many forms: heat, light, chemical, electrical, motion of objects, and
sound. Energy can be transformed from one form to another and transferred from one
place to another.
The response describes two energy transfers that happened from the lamp to the water
and soil in the diagram by:
Identifying the form of energy before and after each transfer.
AND
Describing where each energy transfer happened.
Example:
One Transfer: Light energy changes to heat energy in the soil.
Another Transfer: Light energy changes to heat energy in the water.
Other examples of energy transfers in this system:
Form(s) of energy before and after
Heat to heat energy
Light to heat energy
4
Where the energy transfers happened
Any two objects with different temperatures
that are touching: From the soil to the
thermometer probe or from the water to the
thermometer probe or from the glass beaker
to the soil/water
Light energy changes to heat energy in the
thermometer probe; the glass beaker; the
lamp shade.
A 1-point response demonstrates the student has partial understanding of the GLE.
2-3
A 0-point response demonstrates the student has little or no understanding of the
GLE.
0–1
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Scoring Rubric for Energy Transfers (continued)
Heating Soil and Water – Catastrophic Events Lesson 3
Attributes of a Description for Awarding Value Points
Note: The italicized print is the part of the “Example” credited for the value point.
Value
Points
Description of Attribute
One energy transfer: light energy changes to heat energy
1
Attribute Note:
Where transfer happened: … in the soil
Attribute Note: This point may only be credited with an attempt to identify the energy forms
involved in a correct transfer (e.g. there was an energy transfer in Object Q).
1
Another energy transfer: light energy changes to heat energy…
1
Attribute Note:
Where transfer happened: … in the water.
Attribute Note: This point may only be credited with an attempt to identify the energy forms
involved in a correct transfer (e.g. there was an energy transfer in Object Z).
Total Possible Value Points
1
4
Scoring Techniques:
1. A maximum of two “Transfer” attributes and two “Where transfer happened” attributes may be credited
per response. Responses must be credited as “Transfer/Where transfer happened” pairs. When responses
include more than two pairs, the two pairs with the most attributes should determine the “Total Possible
Attributes.” Therefore, the only way a response can be credited 3 attributes is with one complete
description of an energy transfer/transformation.
2. Responses describing two of the same type of energy transfers may be credited as “One transfer” and
“Another transfer” if “Where the transfer happened” is appreciably different in the given system (e.g.
for a system with several trees and some grass, light changes into chemical energy in a tree and grass
may be credited for two transfers but light changes into chemical energy in tree#1 and tree #2 should be
credited as one transfer.
Responses describing an energy transfer unrelated to the given system should not be credited (e.g. in a SunEarth-Moon system, heat changes into electricity in some devices should not be credited).
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Physical System Energy Transfers (continued)
General Notes:
1.
Incorrect Transfers/Transformations: Responses describing a correct and an incorrect energy
transfer or transformation may not receive credit for the corresponding attribute, transfer or
where transfer happened (e.g. light changes to heat and chemical energy in the bulb, no credit
for transfer). However, responses may use the terms transfer and transformation
interchangeably.
2.
Transfers: Responses may be credited as correctly describing energy being transferred from one
object to another by identifying the two objects and the energy form (e.g. heat energy is
transferred from the bulb to the air.)
3.
Transformations: Responses may be credited as correctly describing energy being transformed
from one form to another by identifying one object, and identifying the energy forms before and
after the transformation (e.g. chemical energy is transformed into electrical energy in the
battery).
4.
Energy Terms as Verbs: Responses using a verb when describing an object’s energy change
may not be credited as identifying the energy form (e.g. the bulb heating the air cannot be
credited as identifying heat energy).
5.
Wave Phenomena: To be credited, responses describing waves as energy transfers must include
an interaction with matter such as reflection, refraction, or transformations of wave energy from
or into other energy forms (e.g. light waves transfer energy from the bulb to the air then change
into heat energy).
a)
Reflection can be credited as an energy transfer when the description includes the source or direction of the
wave before and after the reflection (e.g. light is reflected off the glass bulb to the battery).
b) Refraction can be credited as an energy transfer when the description includes the medium for the wave before
and after the refraction (e.g. light is transferred through the bulb into the air).
6.
Synonyms for Energy Forms: Responses may be credited as correctly identifying an energy
form when the following acceptable terms are used.
a) heat energy: heat, thermal energy
b) sound energy: sound, sound waves, vibration energy
c) light energy: light, sunlight, light waves, light beams, radiant heat, light rays, solar/Sun energy, gamma rays,
x-rays, ultraviolet, infrared, microwaves, radio waves, electromagnetic waves
d) electrical energy: electricity, voltage, electric current, electric charge, electrical power
e) kinetic energy: energy of motion, mechanical energy (work may be credited for mechanical energy when used
appropriately)
f) potential energy: energy of position, elastic energy, gravitational energy, mechanical energy (work may be
credited for mechanical energy when used appropriately)
g) chemical energy: bond energy, food energy, food, glucose, ATP, energy-rich molecules, sugar, starch, protein,
fat, carbohydrate
h) nuclear energy: radioactive energy, radioactivity, fission energy, fusion energy, atomic energy
i) wave energy: light energy, sound energy
7.
Naming an Energy Form: Responses identifying an energy form in an object without
describing a transfer or transformation may not be credited any attributes for that transfer (e.g.
the battery has chemical energy and the fan has kinetic energy).
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