11.3 Tides Review - MGH

How far is Earth from the Sun?

• 150 million km.

• 100 million km.

• 200 million km.

• 250 million km.

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How far is Earth from the Moon?

• 384,000 km.

• 150,000 km.

• 500,000 km.

• 1,000,000 km.

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The distances of Earth from the Sun and the Moon tell you which object exerts more force on Earth.

• Yes, because distance directly determines gravitational force.

• No, because gravitational force depends on both mass and distance.

• Yes, because the closer object always exerts more force.

• No, because the Sun's mass is much greater than the Moon's.

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Analyze: Which point on Earth’s surface experiences the greatest force of gravity from the Moon? Consider each point on the diagram in relation to the Moon.

• The point closest to the Moon

• The point farthest from the Moon

• The point at the center of the Earth

• The point at the equator

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Study the diagram. Why does a tidal bulge form at Point C?

• Due to the gravitational pull of the moon

• Because of the Earth's rotation

• As a result of the sun's gravitational force

• Due to ocean currents

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What is the definition of 'rotation'?

• the spin of an object around its axis

• the movement of an object in a circular path

• the change in position of an object over time

• the force exerted by an object on another object

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Where do the different types of high tides occur?

• In the ocean

• In rivers

• In lakes

• In ponds

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What is the main factor that influences the tidal range of a location?

• The shape of the coastline.

• The rotation of the Earth

• The distance from the equator

• The depth of the ocean

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Calculate: The height of the high tide near a coastal town is 1.5 m. The height of the low tide is 0.7 m. What is the tidal range?

• 0.8 m

• 1.5 m

• 0.7 m

• 2.2 m

During which phases is the Moon lined up with Earth and the Sun?

• New Moon and Full Moon

• First Quarter and Last Quarter

• Waxing Crescent and Waning Crescent

• Waxing Gibbous and Waning Gibbous

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