Show:
Vocabulary
Earth
Moon
Seasons
Random
100
Define:

Gravity

Gravity is the force that keeps planets in orbit around the Sun and the Moon in orbit around the Earth.
100
Life on Earth is dependent on the energy produced by the ____.
Sun.
100
True or false: the moon is larger than the Earth
False
100
What causes Earth's seasons?
The tilt of the Earth's axis.
100
What determines the amount of gravitational pull two objects have?
The mass of the objects and the distance between them
200
What is the difference between a SOLAR and LUNAR eclipse?
Solar: Moon blocks the sun

Lunar: Earth blocks the moon

200
_____ is the natural satellite of the Earth. It is visible mostly at night by reflected light from the sun.
The Moon
200
What forces the moon to remain in orbit around the Earth?
Gravity.
200
When is the Summer Solstice? What is this day important?
Summer Solstice - June 21

It is the longest day of the year. We have the most amount of sunlight on this day.

300
What is the difference between a rotation and a revolution? Provide an example of each.
Rotation (rotate): The spinning motion of a planet on its axis.
Example: The Earth rotates on its axis once every 24 hours.

Revolution (revolve): The movement of objects around another object
Example: The eart revolves around the sun once every 365 1/4 days (1 year)

300
How long does it take the Earth to rotate one time?
24 hours - 1 day
300
What are waxing and waning crescents examples of? Can you explain the difference between the two?
Waxing and waning crescents are examples of two phases of the moon.

Waxing crescent shows light increasing on the moon (word this better?)

Waning crescent shows light decreasing on the moon (word this better?)

300
When is the Winter Solstice? Why is this day important?
Winter Solstice - December 21

This is the shortest day of the year. We receive the LEAST amount of sunlight on this day.

400
Define: Orbit
The path of an object as it revolves around another object in space.
400
How long does it take the earth to revolve around the sun?
365 1/4 days - 1 year
400
The amount of time it takes the moon to revolve ONCE around the Earth is ______.
1 month
400
When is the Vernal Equinox? Why is this day important?
Vernal Equinox - March 21

Earth receives equal amounts of day and night on this day. 12 hours of sunlight and 12 hours of night.

500
What is a comet? What is an asteroid?
Comet: a ball of ice and dust in orbit

Asteroid: objects revolving around the Sun that are too small to be considered planets

500
Explain what causes Earth's seasons
Earth's seasons are caused by the tilt of the Earth's axis.
500
What is caused on Earth because of the moon's gravitational pull?
Tides.

Tides are the rise and fall of the level of water in the oceans.

500
When is the Autumnal Equinox? Why is this day important?
Autumnal Equinox - September 21.

Earth has equal amounts of day and night on this day. There are 12 hours of sunlight and 12 hours of night.