Earth Rotation - Marvel EDU

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Practice Reading: Multiple Choice, Single Answer ID: #2877 Earth Rotation

Instructions ›

Read the text and answer the multiple-choice question by selecting the correct response. Only one response is correct.

As the earth rotates, a sequence of two high tides, separated by two low tides, is produced each day. Twice in each lunar month, when the sun, moon, and earth are directly aligned, with the moon between the earth and the sun (at new moon) or on the opposite side of the earth from the sun (at full moon), the sun and the moon exert their gravitational force in an additive fashion. Higher high tides and lower low tides are produced. These are called spring tides. At two positions 90 degrees in between, the gravitational forces of the moon and sun tend to counteract each other. These are called neap tides.

Which of the following most accurately summarises the opinion of the author in the text?

* Click on the correct answer

Tides involve alternating rise and fall in the large water bodies of the earth. The moon and the sun act to add or counteract the tide-generating effect of each other. Tides are caused by the gravitational attraction of the sun and the moon. The period between succeeding tides varies as the result of movements of the sun and the moon.

Result:

AI explanationShows the answer. Tap to open.

Option 2: "The moon and the sun act to add or counteract the tide-generating effect of each other."

Explanation: This option accurately reflects the author's opinion as presented in the text. The author explains how the gravitational forces of the sun and moon can either combine (during spring tides) or counteract each other (during neap tides), which is the central theme of the passage.

Option 1: "Tides involve alternating rise and fall in the large water bodies of the earth."

Explanation: While this statement is true, it does not capture the author's main opinion about the specific roles of the sun and moon in generating tides. The text focuses on how these celestial bodies interact to create different types of tides, rather than just describing the phenomenon of tides themselves.

Option 3: "Tides are caused by the gravitational attraction of the sun and the moon."

Explanation: Although this statement is partially correct, it oversimplifies the author's opinion. The text elaborates on the interaction between the sun and moon, specifically how their alignment affects the magnitude of tides, rather than just stating that they cause tides.

Option 4: "The period between succeeding tides varies as the result of movements of the sun and the moon."

Explanation: This option is incorrect because it does not address the author's focus on the interaction between the sun and moon. The text discusses the effects of their gravitational forces on tide heights rather than the timing of the tides, making this statement too narrow and not aligned with the main idea.

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