EARTH'S - PowerPoint PPT Presentation

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EARTH'S

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Speed of Rotation: 1,600 km/hr Rotation is measured at the Equator because it is the widest point on the planet Rotation on Axis: Counter clockwise – PowerPoint PPT presentation

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Title: EARTH'S


1
Speed of Rotation 1,600 km/hr Rotation is
measured at the Equator because it is the widest
point on the planet
Rotation on Axis Counter clockwise Tilt 23.5
degrees 1 Rotation 24 hrs 1 Earth Day Cause
Axis imaginary line runs N pole to S pole Earth
spins on axis axis does not change
EARTH'S ROTATION
Effect Day and Night 1 Day 24 hours
2
Seasons Tilt of Earth Revolution around
Sun Angle of the Sun's rays Direct Rays -
Summer Indirect Rays - Winner Equal or Moderate
Rays - Fall and Spring
Revolution one sphere moves around another
sphere Orbit - shape of path of movement Earth's
orbit around the sun is Elliptical
Tilt never changes!!!
Revolution
Seasons in N. Hemisphere are always opposite
those in S. Hemisphere
1 Revolution 365 1/4 days 1 Earth Year
3
Lunar Cycle Lasts 27 - 29 Days Lunar Day 27.3
Earth days Lunar Year 27.3 Earth days Lunar
rotation period Lunar revolution around Earth
Phases are how much of Sun's reflected light is
being seen from Earth
MOON
Waning Fading On LEFT side!!!
Waxing Growing On RIGHT SIDE!!!
4
Moon's gravity pulls on Earth's water Sun's
gravity pulls on Earth's water also Moon's pull
is stronger because it is closer
Spring Tide Full and New Moon Earth, Moon, and
Sun are in a line (aligned)
Neap Tide 1st 3rd(last) quarter Earth, Moon,
Sun form right angle
TIDES
Moderate Tides Gibbous and Crest phases
5
Eclipses
Solar Eclipse Earth Moon Sun Umbra to
see it Penumbra partially see it Lunar Eclipse
Moon Earth Sun anyone can see
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