EARTH IN RELATION TO THE SUN

WATCH THIS!!!

• https://www.google.com/url?sa=t&rct=j&q=earth%20rotating%20and%20revolving%...
• www.youtube.com/watch?v=lkWyM-M8o0c

NIGHT AND DAY?

• The Earth's rotation on its axis is responsible for the days and nights

SEASONS?

• Seasons are caused by the Earth's axis tilting toward or away from the sun as it goes around in orbit.

WHY ARE SEASONS OPPOSITE IN THE HEMISPHERES?

• The seasons are caused by the Earth's tilt.
• So because the earth is tilted one hemisphere is getting
• more direct sunlight than the other.

SUMMER DAYS LONGER THAN WINTER?

• Due to the tilt of the axis the sun hits the earth in different
• ways. The closer you are to the north or south poles, the
• longer days or nights you are going to have.

CHANGES IN THE SUN'S POSITION

• This is caused by Earth orbiting the sun in a continuous
• path while the earth is rotating

WHY DOES THE MOON GO THROUGH PHASES?

• As it orbits around the earth, different directions of
• light fall on it everyday throughout the year.

WHAT CAUSES THE TIDES?

• Tides are caused by the gravitational
• pull between Earth and the moon.

SIDEREAL DAY AND SOLAR DAY

• Sidereal days are roughly 4 min. shorter than a Solar day.
• The earth moves a bit less than a degree around its orbit during
• the course of one day, so after a complete rotation it has to rotate
• an extra degree to bring the sun back into the same apparent position.

SIDEREAL AND SYNODIC PERIODS

• Sidereal periods are relative
• to the stars. Synodic periods are measured by the
• relation of an object to two other points.

BIBLIOGRAPHY

• www.youtube.com/watch?v=lkWyM-M8o0c
• science.howstuffworks.com/environmental/earth/.../earth2.htm _sub1.htm
• www.polaris.iastate.edu/NorthStar/Unit4/unit4_sub1.htm
• www.youtube.com/watch?v=lkWyM-M8o0c science.howstuffworks.com/environmental/earth/.../earth2.htm
• www.youtube.com/watch?v=62Zapn4pJRg www.dur.ac.uk/john.lucey/users/e2_solsid.html