SCIE- Earth-Moon-Sun

Seasons

• Angle of Earth’s axis causes seasons

• They occur because of two factors:

  1. direct vs indirect sunlight

  2. hours of daylight

Time Zones

• around 37 in the world

• 24 time zones

• offset from one another by an hour

Summer & December Solstice

• June 21 day with most direct sunlight

• Dec 21 day with least direct sunlight

Spring & Autumn Equinox

• march 21

• sep 23

• both hemispheres receive equal amount of sunlight

Tides

• Rising and falling sea levels due to Earths rotation and gravitational pulls of sun and moon

Bulges

• moon’s gravity pulls water from other areas to the side closets to the moon

• these areas of higher water levels are high tides areas

Spring Tides

• when the moon sun and earth line up

• create even higher tides called Spring tides

Neap Tides

• when the sun and moon pull on earth in two different directions

• creating smaller tides

Lunar Cycle

• the moon’s orbit causes the lunar phases to appear to us

• 4 main faces, about a week apart:

  New moon: when the moon is in front of the earth

  First quarter: occurs halfway between new and full moon

  Full moon: when the moon is behind the earth

  Third quarter: occurs halfway between new and full moon

Lunar Eclipse

• when the earth lines up just right between the sun and the moon,

• the earth blocks the sun’s rays from hitting the moon’s surface

• reddish full moon “blood moon”

Solar Eclipse

• when the moon comes between the earth and the sun blocking the sun’s rays from reaching earth

• obscures the sun, only the outer rim is visible

• (new moon)