# Unit 5 Indiana Science Fusion Lesson 3

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In this Indiana Science Fusion quiz, see how you fair against topics like gravitational pull, tidal range, neap tides, and how often the moon passes over particular spots on the earth’s surface. How much can you tell us? Let’s see.

• 1.

### Which gravitional pull has the greatest effect on the tides?

• A.

The sun's gravitational pull on Earth

• B.

The moon's gravitational pull on Earth

• C.

Earth's gravitational pull on the moon

• D.

The sun's gravitational pull on the moon

B. The moon's gravitational pull on Earth
Explanation
The moon's gravitational pull on Earth has the greatest effect on the tides. This is because the moon is much closer to Earth than the sun, and its gravitational force is stronger. The moon's gravitational pull causes the water on Earth to bulge towards it, creating a high tide. As the Earth rotates, different parts of the planet experience high tides and low tides. The sun also has an effect on the tides, but it is less significant compared to the moon's influence.

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• 2.

### How often does the moon pass over a particular spot on Earth's surface, causing tides as a result of its gracitational pull?

• A.

Once every 10 seconds

• B.

Once every 12 hours and 25 minutes

• C.

Once every 24 hours and 50 minutes

• D.

Once every 14 days

C. Once every 24 hours and 50 minutes
Explanation
The moon passes over a particular spot on Earth's surface, causing tides, once every 24 hours and 50 minutes. This is because the moon takes approximately 24 hours to complete one full revolution around the Earth, but because the Earth is also moving around the sun, it takes an additional 50 minutes for the moon to return to the same spot relative to the sun. This 24-hour and 50-minute cycle is known as a lunar day and is responsible for the regular occurrence of tides.

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• 3.

### What is tidal range?

• A.

The periodic rise and fall of the water level in the oceans due to the gravity of the moon and sun

• B.

A tide of minimum range that takes place two times a month

• C.

The difference in levels of ocean water at high tide and at low tide

• D.

A rise in ocean water levels that takes place on the side of Earth nearest the moon

C. The difference in levels of ocean water at high tide and at low tide
Explanation
Tidal range refers to the difference in levels of ocean water at high tide and low tide. It is the vertical distance between the highest point reached by the tide (high tide) and the lowest point (low tide). This difference is caused by the gravitational pull of the moon and sun on Earth's oceans, resulting in the periodic rise and fall of water levels. The other options mentioned in the question do not accurately describe tidal range.

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• 4.

### During which two phases of the moon do neap tides take place?

• A.

New moon, full moon

• B.

New moon, first quarter moon

• C.

Third quarter moon, full moon

• D.

First quarter moon, third quarter moon

D. First quarter moon, third quarter moon
Explanation
Neap tides occur during the first quarter moon and third quarter moon phases. During these phases, the gravitational forces of the sun and the moon act on the Earth at right angles, resulting in the lowest tidal range. This happens because the gravitational pull of the sun and moon partially cancel each other out, leading to weaker tides.

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• 5.

### Roman is writing an "equation" to show the effect of the gravitational pull of the sun and the moon on tidal range during neap tides.  Which equation would Roman use to show this effect?

• A.

Sun + moon = maximum tidal range

• B.

Sun + Earth = maximum tidal range

• C.

Moon - sun = minimum tidal range

• D.

Earth - moon = minimum tidal range

C. Moon - sun = minimum tidal range
Explanation
During neap tides, the gravitational pull of the moon and the sun is in opposition, resulting in a smaller tidal range. The equation "moon - sun = minimum tidal range" represents this effect, as the subtraction indicates the opposing forces of the moon and the sun, which leads to a minimum tidal range.

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• Mar 22, 2023
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• Dec 13, 2011
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