Tides & Eclipses Astronomy Page 12 ©Mark Place,

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Presentation transcript:

Tides & Eclipses Astronomy Page 12 ©Mark Place, 2007-2008 www.LearnEarthScience.com

Tides

What causes tides?

Caused by the gravitational pull of the moon & sun

Based on the Diagram, which are larger? Spring Neap? or SPRING TIDES

During which phases of the moon do neap and spring tides occur?

Neap Quarter phases Neap?

New and Full Moon Spring?

How many tides a day (24 hours)? 2 high tides 2 low tides Tide charts - NOAA

Rising tides

Why are there not exactly 12 hours between tides? Because the Moon is always revolving around the Earth

solar and lunar eclipses? What’s the difference between solar and lunar eclipses? Solar Lunar Earth blocks Out the moon Moon blocks out the Sun

What phase? New Moon Solar Eclipse solar eclipse visual In fact, it is an unlikely coincidence that we see total solar eclipses at all. The Moon is about 400 times smaller than the Sun, but also happens to be about 400 times closer solar eclipse visual

Solar Eclipses through 2020

Annular Eclipse May 10, 2013 You'd have to wait an average of 375 years to see two total eclipses from one place.

Lunar Eclipse What phase? Full Moon

lunar eclipse visual

May 25, 2013 Lunar Eclipse 2013

solar and lunar eclipses Why don’t we have solar and lunar eclipses every month? The moon’s orbit is tilted 5° from the Earth’s orbit.