Question

part a - concept connections
match each concept to its correct description or example. some may be used more than once.
concept

1. work
2. power
3. kinetic energy
4. potential energy
5. conduction
6. convection
7. radiation
8. energy transformation
9. chemical energy
10. mechanical energy

description / example
a. a stretched rubber band before release
b. total energy (kinetic + potential) in a system
c. the rate at which work is done
d. the transfer of energy through direct particle contact
e. heat transfer by moving fluids (air or water)
f. a fan converts electrical → mechanical energy
g. energy that travels through space as electromagnetic waves
h. pushing a box with force over a distance
i. energy stored in bonds of molecules like glucose
j. the energy of motion, like a rolling ball

Explanation:

• Work: Work is defined as the transfer of energy when a force is applied over a distance. Pushing a box with force over a distance (h) is a classic example of work being done.
• Power: Power is the rate at which work is done. It measures how quickly energy is transferred or work is accomplished.
• Kinetic Energy: Kinetic energy is the energy of motion. A rolling ball (j) has kinetic energy because it is in motion.
• Potential Energy: Potential energy is stored energy. A stretched rubber band before release (a) has elastic potential energy.
• Conduction: Conduction is the transfer of energy through direct particle contact.
• Convection: Convection is heat transfer by moving fluids (air or water) (e).
• Radiation: Radiation is energy that travels through space as electromagnetic waves (g).
• Energy Transformation: Energy transformation occurs when one form of energy is converted into another. A fan converting electrical → mechanical energy (f) is an example.
• Chemical Energy: Chemical energy is energy stored in the bonds of molecules like glucose (i).
• Mechanical Energy: Mechanical energy is the total energy (kinetic + potential) in a system (b).

Answer:

1. h
2. c
3. j
4. a
5. d
6. e
7. g
8. f
9. i
10. b