Rotation
How long does it take for the Earth to make one rotation?
What does the Earth revolve around?
The sun
What does a sundial do?
Cause: Earth's Rotation. What is one effect?
Effect: Day/Night
The Northernmost point on Earth, as determined by the planet's rotation.
The North Pole
What is the name of the imaginary line on which the Earth rotates?
Earth's Axis
How long does it take for Earth to make one revolution around the sun?
365 days/1 year
Why does a sundial only have 12 hours?
The other 12 hours are night; there are no shadows to measure.
Cause: Earth's Axis
The Southernmost point on Earth, as determined by the Earth's rotation
The South Pole
Why doesn't everyone experience night and day at the same time?
Because of Earth's rotation, only half of the Earth is facing the sun at a time; the other half is in darkness.
The Moon
Why should there be a sundial for every season?
Cause: Earth's Revolution
Effect: One year
A natural satellite that orbits a planet; some planets have none while others have over 60.
Moon
In which direction does Earth rotate?
Counterclockwise
What is the path that Earth takes on its revolution around the sun called?
Orbit
EXACTLY how many hours and minutes are there in one day?
23 hours and 56 minutes
Effect: The sun appears to rise and set
Cause: We are moving, so our perspective when looking at the sun changes as we rotate.
Making a complete spin on an axis
Rotation
Why don't we feel the Earth rotating?
The Earth is in constant motion. Because it doesn't slow down or speed up, we don't feel it.
What is the difference between revolution and rotation?
Rotation is the Earth spinning on its axis and it takes only 1 day; Revolution is Earth spinning/orbiting around the sun and it takes 1 year.
Why do we have an extra day in Feb on leap years? (every 4 years)
It actually takes the Earth 365.24 days to revolve around the sun. But, we only have 365 days/year. So, the extra 1/4 day adds up every 4 years to one extra day to catch up.
Effect: Shadows appear to move throughout the day.
Cause: As the Earth rotates, the sun hits at different angles--casting different shadows.
The path one object takes as it revolves around another object in space
Orbit