A fisherman and his young niece are in a boat on a small pon

A fisherman and his young niece are in a boat on a small pond. Both are wearing lifejackets. The niece is holding a large helium filled balloon by a string. Consider each action below independently and indicate whether the level of the water in the pond, Rises, Falls, is Unchanged or Cannot tell. The fisherman knocks the tackle box overboard and it sinks to the bottom. The fisherman lowers the anchor and it hangs one foot above the bottom of the pond. The fisherman fills a glass with water from the pond and drinks it. The niece gets in the water and pops the helium balloon The fisherman lowers himself in the water and floats on his back. The niece pops the helium balloon.

Solution

the level of the water in the pond, Rises(R) Falls(F), is Unchanged(U) or Cannot tell.(CT)

- The fisherman lowers himself in the water and floats on his back. (U)

- The son finds a cup and bails some water out of the bottom of the boat (U)

- The fisherman knocks the tackle box overboard and it sinks to the bottom.( F)

- The fisherman lowers the anchor and it hangs one foot above the bottom of the pond. (U)

- The son gets in the water and pops the helium ballon (R)

- The son pops the helium balloon. (R)