Evans-Review:Tides 8.7C

Understand tides! Learn about high, low, spring, and neap tides caused by Moon & Sun gravity.

Vocabulary Matching Match the term with the best possible definition. High Tide When tides are at their highest elevation Low Tide When tides are at their lowest elevation Spring Tide When tides experience the greatest range between high and low due to the alignment of the Earth, Moon, and Sun Neap Tide When tides experience the least range between high and low due to the Moon and Sun being at right angles relative to the Earth Gravitational Pull The invisible force that exists between all objects that have mass. The greater the mass, the greater the effect of this force Tide The daily change in ocean levels due to the gravitational force of the moon and sun exerted on Earth Use the vocabulary words from the matching to select the words that best fit in the paragraph. Sitting on a sunny beach, you may think you have set up your towel the perfect distance from the ocean. However, if you stayed for several hours you may find that your towel started getting hit by waves that were once farther away. This is because the ocean levels changed due to the gravitational pull of the moon and the sun. This change in ocean level is called the ocean’s tide. Gravity is a force that attracts objects with mass, and is stronger when objects are closer and more massive. Therefore, the moon is the object that has the largest effect on Earth’s tides. The gravitational pull of the moon pulls the water on Earth’s surface towards it, creating higher levels of water, or high tide. Since water is being pulled towards the moon in some places causing the high tide, the water levels become lower in other locations, which is called low tide. On certain days throughout the year, the sun and moon align, causing extreme tidal forces. These extreme tides have the highest high tides and the lowest low tides, and are called spring tides. Opposite of spring tides, when the Moon is perpendicular to the Sun relative to Earth, Earth’s oceans experience the least difference between water levels, which are called neap tides. At which locations would the Earth be experiencing high tide? (mark all that apply) * NOTE where the full moon is... you should know the sun placement by that.PICK 2 A B C D E F G H At which locations would the Earth be experiencing low tide? (mark all that apply) A B C D E F G H At which locations would the Earth be experiencing high tide? (mark all that apply) A B C D E F G H At which locations would the Earth be experiencing low tide? (mark all that apply)* NOTE where the full moon is... you should know the sun placement by that.PICK 2 A B C D E F G H Explain what kind of tides the Earth would be experiencing. Spring Tide because the Sun, Moon, and Earth are aligned. Neap Tide because the Sun, Moon, and Earth are aligned. Spring Tide because the Moon is perpendicular to the Sun relative to the Earth. Neap Tide because the Moon is perpendicular to the Sun relative to the Earth. Explain what kind of tides the Earth would be experiencing. Spring Tide because the Sun, Moon, and Earth are aligned. Neap Tide because the Sun, Moon, and Earth are aligned. Spring Tide because the Moon is perpendicular to the Sun relative to the Earth. Neap Tide because the Moon is perpendicular to the Sun relative to the Earth. Explain what kind of tides the Earth would be experiencing. Spring Tide because the Sun, Moon, and Earth are aligned. Neap Tide because the Sun, Moon, and Earth are aligned. Spring Tide because the Moon is perpendicular to the Sun relative to the Earth. Neap Tide because the Moon is perpendicular to the Sun relative to the Earth. Explain what kind of tides the Earth would be experiencing. Spring Tide because the Sun, Moon, and Earth are aligned. Neap Tide because the Sun, Moon, and Earth are aligned. Spring Tide because the Moon is perpendicular to the Sun relative to the Earth. Neap Tide because the Moon is perpendicular to the Sun relative to the Earth. Juan lives near the Pacific Ocean and likes to observe the tides. Juan notices that about twice a month the range between the high and low tide is greater than normal. What is the most likely reason for Juan's observation? The Moon must be closer to the Earth causing a larger change in tides The Sun and Moon are aligned, causing a spring tide The Moon is perpendicular to the Sun relative to earth, causing a neap tide Jupiter is closer in its orbit to Earth Erika walks down to the beach and notices that mussels and seaweed living on large boulders that are sometimes covered in water are now exposed to the air. What is the most likely reason for this observation? Global water levels are decreasing due to extreme drought The Moon's gravity is pulling water at that location towards the moon The Moon's gravity is pulling water at another location on Earth, lowering water levels at Erika's location The sun evaporated the ocean's water In the diagram below, which location(s) would be experiencing high tide? Location A and B Location A only Location B and D Location A and C What tidal conditions would you expect when the Earth, Sun, and Moon are configured according to the diagram below? Tides with a greater range between high and low tides Tides with a smaller range between high and low tides Only high tides Only low tides