Question

1. choose the best definition based on the context of the sentence from the novel.

turbulence
\the pilot did not move except that his head rolled on a neck impossibly loose as the plane hit a small bit of turbulence.\
the boundary between the earth and the sky

to roll around in a relaxed way

violent or unsteady movement of air

uncertain or unclear

1. choose the best definition based on the context of the sentence from the novel.

horizon
\he could see them the trees ahead on the horizon where before he could see only sky.\
uncertain or unclear

an instrument that measures altitude attained

the boundary between the earth and the sky

violent or unsteady movement of air

Explanation:

Sub - Question 1

In the sentence “The pilot did not move except that his head rolled on a neck impossibly loose as the plane hit a small bit of turbulence”, we are talking about the plane encountering something. Planes fly in the air, and “turbulence” in the context of aviation and air travel refers to the violent or unsteady movement of air. The other options: “the boundary between the Earth and the sky” is related to horizon, “to roll around in a relaxed way” does not fit the context of what the plane hits, and “uncertain or unclear” is not related to the physical phenomenon the plane is encountering.

In the sentence “He could see them [the trees] ahead on the horizon where before he could see only sky”, the horizon is the line where the Earth (or in this case the trees on the Earth) and the sky seem to meet. The other options: “uncertain or unclear” is not related to the horizon's definition, “an instrument that measures altitude attained” is an altimeter, and “violent or unsteady movement of air” is turbulence.

Answer:

C. violent or unsteady movement of air

Sub - Question 2