Study Guide for the Gravity, Seasons,
Tides, and Moon Quiz
Earth:
 The Earth rotates on its axis. It takes the Earth 24 hours to complete one rotation.
 An example of rotation is spinning a ball.
 One rotation of the Earth causes night and day.
 The Earth is revolving around the sun.
 An example of revolution is walking around your chair.
 One revolution of the Earth takes 1 year.
Moon:
 The moon is revolving around the Earth.
 One revolution of the moon takes 27.3 days.
 One rotation of the moon on its axis also takes 27.3 days.
 The moon phase depends on the position of the Earth, moon and sun.
Moon Phases:
New Moon
Full Moon
Waxing Crescent
Waning Gibbous
First Quarter
Waxing Gibbous
Last Quarter
Waning Crescent
Study Guide for the Gravity, Seasons,
Tides, and Moon Quiz
Seasons:
 Seasons are caused by the tilt of the Earth and the revolution of the Earth.
 When our part of the Earth (the Northern Hemisphere) is tilted away from the sun we
are experiencing winter.
 When our part of the Earth (the Northern Hemisphere) is tilted towards the sun we
are experiencing summer.
Tides:
 The gravitational pull of the moon has the greatest affect on the Earth’s tides.
 In most places on Earth there are 2 high tides and 2 low tides every 24 hours.
Spring Tide
Neap Tide
Gravity:
 Gravity is a type of force. All matter has gravity. The greater the mass of an object
the more gravitational pull it has.
 Gravity keeps the planets orbiting around the sun.
 Your weight will change on different planets because of gravity.
 Objects fall because of gravity. Heavy and light objects will hit the ground at the same
time if released at the same time.