When are tides in Earths oceans the highest?
1. during the moon's waning gibbous phase
2. during the moon's waxing gibbous phase
3. when the moon is at a right angle to the sun
4. When the sun, Earth, and moon are in a line.
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To determine when tides in Earth's oceans are the highest, we need to understand the relationship between the moon, the sun, and the Earth. The gravitational forces exerted by the moon and the sun are the main factors that cause tides.
1. During the moon's waning gibbous phase: This phase occurs when the sun and moon are on opposite sides of the Earth. Although the gravitational pull is still present, tides are not typically as high during this phase compared to when the moon is in a different configuration.
2. During the moon's waxing gibbous phase: This phase also occurs when the sun and moon are on opposite sides of the Earth, and similarly, tides are not typically as high as in other configurations.
3. When the moon is at a right angle to the sun: This condition is known as the moon being in quadrature. During this configuration, the gravitational forces of the moon and sun partially cancel each other out, resulting in lower tides.
4. When the sun, Earth, and moon are in a line (called syzygy): This configuration occurs during a new moon or a full moon. When the sun, Earth, and moon are aligned, their combined gravitational force enhances the tidal bulge on Earth, causing higher tides. This alignment is responsible for spring tides, which are the highest and lowest tides.
Based on the explanations above, the highest tides occur when the sun, Earth, and moon are in a line (choice 4).