In which sentence is the word periscope used correctly?

A. Excited about her finding, the scientist used a periscope to view the organisms in the water sample.
B. On the night of the full moon, we used the periscope to look at the sky.
C. Sitting behind the tall stone walls, the soldier used a periscope to view the field surrounding the fort. ***
D. I held the periscope up to the light and was delighted with the many patterns I saw!

c seems to be correct, yes.

Concave

Plane mirror

To determine which sentence uses the word "periscope" correctly, we can examine each option and understand the meaning of the word.

A periscope is a visual instrument that allows the viewer to see objects that are not in their direct line of sight. It typically consists of a tube with mirrors or prisms that reflect light and create an image of the object.

Let's look at each sentence:

A. "Excited about her finding, the scientist used a periscope to view the organisms in the water sample."

This sentence correctly uses the word "periscope." The scientist is using a periscope to view the organisms in the water sample, which aligns with the purpose and function of a periscope.

B. "On the night of the full moon, we used the periscope to look at the sky."

This sentence seems to use the word "periscope" incorrectly. Periscopes are not typically used for looking at the sky, as their purpose is to view objects that are below the observer's line of sight.

C. "Sitting behind the tall stone walls, the soldier used a periscope to view the field surrounding the fort."

This sentence correctly uses the word "periscope." The soldier is using a periscope to view the field surrounding the fort, which is consistent with the purpose of a periscope.

D. "I held the periscope up to the light and was delighted with the many patterns I saw!"

This sentence seems to use the word "periscope" incorrectly. Periscopes are not typically held up to the light to see patterns. They are specifically designed to view objects that are not directly visible.

Based on the analysis, the correct sentence that uses the word "periscope" correctly is sentence C: "Sitting behind the tall stone walls, the soldier used a periscope to view the field surrounding the fort."