Earth-Sun-Moon SystemTides (pg. 458-60)

and Eclipses (pg. 628-29)

Regents Earth Science

With Ms. Connery

Eclipses and Tides Vocabulary

Eclipses

• solar eclipse

• lunar eclipse

• total eclipse

• umbra

• corona

• partial eclipse

• penumbra

Tides

• gravity

• daily cycle of high

and low tides

• spring tides

(extremes)

• neap tides

The changing

positions of the

earth, sun and

moon:

- cause the

daily tide cycle,

and

- sometimes

creates

eclipses.

Tides depend on the alignment of the

Earth, Sun and Moon, too!

But first, what are tides?

Tides happen in a daily cycle related to Earth’s

rotation and the Moon’s gravity field.

Spring Tide – extremes twice

each month when moon sun

and Earth are aligned in a

row (on either side)

Neap tide – reduced tide

range when moon and sun are

positioned at 90o

http://ithacasciencezone.com/earthzone/lessons/09space/tide/tide.htm

Solar Eclipse

from around the world!

Partial Solar Eclipse 2002

Why we see a solar eclipse from earth

Antarctic total solar eclipse 2003

What is a Lunar Eclipse

4/8/2005

LUNAR ECLIPSE