A push or pull.
What is a force?
The shape of an orbit.
What is an ellipse?
A star at the center of our solar system.
What is the Sun?
Tilt and revolution around the Sun.
What is the reason for the seasons?
Always half lit.
What is the moon?
Two objects attract each other in the universe.
What is Newton's Law of Universal Gravitation
When a rocket is launched and the rocket did not make it around the Earth?
What is the speed was too low?
The planets Mercury, Venus, Earth and Mars.
What are the inner (terrestrial) planets?
23.5 degree tilt
What is the tilt of the Earth on its axis?
The moon is between the Sun and Earth.
What is the position of where a new moon will be?
The force pulling a mass towards the center of Earth.
What is gravity
What are the factors that keep something in orbit?
The planets...Jupiter, Saturn, Uranus and Neptune.
What are the outer (gaseous) planets?
Summer for the northern hemisphere.
What is when the north axis is tilted toward the Sun or June 21st (summer solstice)?
A rotation and revolution of the moon around the Earth.
What is approximately every 28 days or a month?
When the gravitation force between two objects increases.
What is the mass of either object has increased or the distance between them became less?
A satellite going off into space and losing its orbit.
What is the speed is too great for the gravitational pull or escape velocity?
The units used to make larger space distances into smaller units.
What are astronomical units?
Spring and Fall Equinoxes
What is when the axis is neither pointed toward or away from the Sun?
When you can see a sliver of light on the left hand side of the moon.
What is a waning crescent?
What is by mass?
The orbit becomes more elliptical.
What is the speed/velocity increased of the orbiting body, the mass decreased of the orbiting body, or the mass of the central body increased?
The solar system is too hard to fit accurately onto a text book page or diagram.
What is because the size and distances are so large?
The reason why the northern hemisphere experiences summer, when the southern hemisphere experiences winter.
What is the surface of the Earth is curved, and when the north axis is tipped toward the south axis is tipped away causing direct light on northern hemisphere and indirect light on southern hemisphere?
Lunar and solar eclipses do not occur every month.
What is because the moon's orbit is tilted 5 degrees?