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a. Clouds moving across the sky - Kinetic energy (movement)
b. Water behind a dam - Potential energy (due to its position and height)
c. An avalanche - Kinetic energy (movement)
d. Electrons orbiting the atomic nucleus - Potential energy (due to their position and energy level)
f. A yoyo before it is released - Potential energy (due to its position and being stretched)
g. A book on a table before it falls - Potential energy (due to its position and height)