A cannon fires a cannonball. Explain how the cannonball gains kinetic energy.
A. The sound of the explosion propels the cannonball.
B. The thermal energy of the explosion propels the cannonball.
C. The chemical energy of the explosives transforms into kinetic energy.
D. The electrical potential energy of the explosives transforms into kinetic energy.

Astudent looks at ocean waves coming into the beach. an ocean wave with more energy will a) have a greater height. b) have a greater period. c) travel toward the beach faster. d) strike the beach with greater frequency.

Marcella is a four-year-old girl who is a victim of emotional child abuse. based on the child and family services improvement and innovation act of 2011, which action should the government take for marcella? a. the state should arrest marcella’s abuser. b. the state should find a home for marcella as soon as possible. c. the state should enforce stricter laws in the area where marcella resides. d. the state should provide medical assistance to marcella.

Which component of the earth’s atmosphere is decreased due to photosynthesis?