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Rotation
• Earth rotates counter clockwise into the sun’s light if you are looking down on the North pole (night and day).
Rotation
• Earth rotates counter clockwise into the sun’s light if you are looking down on the North pole (night and day).
• Axis: 23½º (tilt)
Rotation
• Earth rotates counter clockwise into the sun’s light if you are looking down on the North pole (night and day).
• Axis: 23½º (tilt)–Imaginary line that passes
through Earth’s center at the N & S Poles.
Earth’s Rotation• At the equator the Earth has a
circumference of 40,070 km.
• Rotates once in 24 hours.
Earth’s Rotation• At the equator the Earth has a
circumference of 40,070 km.
• Rotates once in 24 hours.
• This means that the speed
of the Earth at the equator is
1,670 km/hr (1,070 miles/hr).
Earth’s Rotation• At the equator the Earth has a
circumference of 40,070 km.
• Rotates once in 24 hours.
• This means that the speed
of the Earth at the equator is
1,670 km/hr (1,070 miles/hr).– At 45 degrees N and S
The speed is 1,180 km/hr.
Earth’s Rotation• At the equator the Earth has a
circumference of 40,070 km.
• Rotates once in 24 hours.
• This means that the speed
of the Earth at the equator is
1,670 km/hr (1,070 miles/hr).– At 45 degrees N and S
The speed is 1,180 km/hr.– Winston Salem, NC the
speed is about 1,367 km/hr.
Facts and Myths• The sun rises and sets.
– Myth
• The Earth rotates in and out of the sun’s light.– Fact
Facts and Myths• The sun rises and sets.
– Myth
• The Earth rotates in and out of the sun’s light.– Fact
• The sun moves across the sky
Facts and Myths• The sun rises and sets.
– Myth
• The Earth rotates in and out of the sun’s light.– Fact
• The sun moves across the sky– Myth
Facts and Myths• The sun rises and sets.
– Myth
• The Earth rotates in and out of the sun’s light.– Fact
• The sun moves across the sky– Myth
• We spin under the light of the sun.
Facts and Myths• The sun rises and sets.
– Myth
• The Earth rotates in and out of the sun’s light.– Fact
• The sun moves across the sky– Myth
• We spin under the light of the sun. – Fact
Rotation vs. Revolution• Rotation is the spin of an object
about its axis.
–The Earth rotates once a day (once every 24 hours).
Rotation vs. Revolution• Rotation is the spin of an object
about its axis.
–The Earth rotates once a day (once every 24 hours).
• Revolution is the orbit of one object around another.
Rotation vs. Revolution• Rotation is the spin of an object
about its axis.–The Earth rotates once a day
(once every 24 hours).• Revolution is the orbit of one
object around another.–The Earth revolves around the
Sun every 365.26 days.