WorksheetsES ch 2 sections 3 & 4
Total questions: 10
Worksheet time: 5mins
A thermostat set to 62°F turns on the furnace when a house cools below that temperature, and shuts the furnace off when a house warms above that temperature. This is an example of a simple ____.
positive feedback loop
geothermal feedback loop
negative feedback loop
thermodynamic loop
Which of the following energy forms is low quality?
The energy released by burning coal
The heat dispersed in the ocean
Concentrated sunlight
inputs & outputs
Energy can be formally defined as the ____.
heat generated by atoms losing electrons
displacement of heat from the sun to the earth
heat generated by atoms losing protons
capacity to do work
Kinetic energy and potential energy differ in that____.
heat is a type of potential energy, not kinetic energy
potential energy is always higher quality energy
kinetic energy is energy of motion and potential energy is stored energy
potential energy is energy of motion and kinetic energy is commercial energy
Most living systems can be described as having inputs, ____, and outputs.
Creations
Throughputs or flow
Kinetics
An example of kinetic energy is ____.
water in a reservoir behind a dam
water in a puddle
water flowing down a waterfall
a rock held in your hand several feet above ground
A form of kinetic energy that travels in the form of a wave as a result of changes in electrical and magnetic fields is ____.
windmills
waterfalls
electromagnetic radiation
wind
A positive feedback loop ____.
increases a change to a system
decreases a change to a system
never results in a beneficial change to a system
The second law of thermodynamics says that whenever energy is converted from one form to another in a physical or chemical change, ____.
light is produced
we end up with higher - quality or more useable energy than we started with
we end up with lower-quality or less useable energy than we started with
the second form of energy will always be kinetic
A positive feedback loop causes a system to change in the opposite direction from which it is moving.
true
false
