People have used various methods to measure the depth of the ocean. Long ago sailors lowered a rope over the side of the ship. When the rope touched the bottom,they knew how deep the water was. Today scientists measure the depth of the water with an echo sounder. It bounces sound waves off the bottom of the ocean. The depth of the ocean is determined by the amount of time it takes the sound waves to travel.

Question

People have used various methods to measure the depth of the ocean. Long ago sailors lowered a rope over the side of the ship. When the rope touched the bottom,they knew how deep the water was. Today scientists measure the depth of the water with an echo sounder. It bounces sound waves off the bottom of the ocean. The depth of the ocean is determined by the amount of time it takes the sound waves to travel.

which of the following is a detail from the passage?
tip:Look back at the passage. Find the answer choice that is a detail.
a. Various methods have been used to measure the ocean's depth.
b. Sailors sail on ships.
c. Echo sounders sounders bounces sound waves off the bottom of the ocean.
d. Diving can take sailors into deep water.

Answer 1

I'll be glad to check your answer.

Answer 2

Nope.

This is the topic sentence: "People have used various methods to measure the depth of the ocean."

What detail supports this sentence?

Answer 3

Well -- you've guessed 3 of the 4.

Answer 4

C is correct.

Answer 5

The detail from the passage is: "Echo sounders bounce sound waves off the bottom of the ocean." Therefore, the correct answer is c. Echo sounders bounce sound waves off the bottom of the ocean.