Tides and Eclipses Tides

Tides and Eclipses Tides

Tides and Eclipses Tides • The tides are the rising and falling of the ocean surface as a result of the gravitational pull of the moon and the Sun on the earth. • The Moon plays a bigger role than the Sun because it is closer. Effect of the Moon on the Tides Water bulges on opposite side Water gets pulled towards from the moon the moon: High Tide in also: High Tide this location. in this location moon Low tide here, and on opposite side on the earth that you can’t see. Role of the Sun • The sun also has a gravitational pull on the earth. – When the sun is lined up with the moon and the earth, it “helps” the moon pull on the earth, and the tides become more extreme. – When the sun is not lined up with the moon and the earth, it partially cancels out the pull of the moon, and the tides are less extreme. Spring Tides • Sun, earth and moon are lined up. • Higher high tide, Lower low tide. Regular Tide Level Tide Level during Spring Tides Neap Tides • High tide is lower than normal, and low tide is higher than normal. There is less difference between the level of the tides. Regular High Tide High level tide during neap level tides Occurrence of Neap and Spring Tides • Spring tides Neap Tides occur occur when sun, when the sun and moon moon and earth pull in opposite are lined up: Full Moon and New directions: First Moon. Quarter and Last Quarter. Eclipses • There are two types of eclipses: – Solar Eclipse- When the moon lines up exactly in between the sun and the earth. – It blocks out the sun so we can’t see it. – Lunar Eclipse- When the earth lines up exactly in between the moon and the sun, and prevents sunlight from reaching the moon. – Or, another way to say it is the moon moves into the shadow of the earth. Solar Eclipse Sun Moon Earth • Occurs when the moon is a New Moon and lined up perfectly with the sun and earth. Places on earth in Places on earth in the the Penumbra will Umbra see a Total Solar see a Eclipse Partial Solar Eclipse Solar Eclipse Lunar Eclipse Sun Earth Moon • Occurs when the moon is a Full Moon and the earth, moon and sun are exactly lined up. Lunar Eclipse.

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