Sky From Earth & Earth' s Moon
Earth In Space
Gravity & Motion
Phases and Eclipses
Tides
100
What are the round pits on the moon called?
Craters
100
How long does it take for the Earth to take one complete revolution around the sun?
A Year--365 1/4 days
100
What is a force?
A force is a push or a pull
100
The phase of the moon you see depends on...
The phase of the moon you see depends on how much of the sunlit side of the moon faces Earth.
100
What causes the rise and fall of ocean water every 12.5 hours or so?
Tides
200
True or False: Maria are flat areas once flooded with lava, on the moon's surface.
True
200
Why does Earth have seasons?
Earth has seasons because its axis is tilted as it moves around the sun.
200
What does the strength of the force of gravity depend on?
The masses of the objects and the distance between them.
200
What are the different shapes of the moon seen from Earth called?
Phases
200
What causes tides?
Tides are caused by differences in how much gravity from the moon and the sun pulls on a different part of the Earth.
300
The temperature of the moon's surface varies greatly from day to night because the moon has
No atmosphere
300
What causes day and night?
Day and night are caused by Earth's rotation on its axis.
300
The two factors that combine to keep Earth and the moon in their orbits are...
Gravity and inertia
300
From new moon phase to full moon phase, you see....
An increasing amount of the lit side of the moon.
300
When do neap tides occur?
When the sun's pull is at a right angle to the moon's pull.
400
Name at least 3 objects you can observe in the sky.
Stars, moon, planets, meteors, and comets
400
What marks the beginning of spring in the Northern Hemisphere?
The beginning of spring in the Northern Hemisphere is marked by the vernal equinox.
400
How would the moon move if Earth's mass increased?
The moon would spiral toward the Earth.
400
What has to happen in order for a solar eclipse to occur?
For a solar eclipse to occur, the moon must be directly between Earth and the sun.
400
When do spring tides occur?
Spring tides occur when the sun, the moon, and Earth are nearly in a line during a new moon or a full moon.
500
Why do objects in the sky appear to move?
Objects in the sky appear to move due to Earth's rotation on its axis and orbit around the sun.
500
When does an equinox occur?
An equinox occurs when neither hemisphere is tilted toward or away from the sun.
500
What does Newton's law of universal gravitation state?
Newton's law of universal gravitation states that every object in the universe attracts every other object.
500
Why are you less likely to see a total solar eclipse than a total lunar eclipse?
You are less likely to see a total solar eclipse than a total lunar eclipse because the moon's umbra only covers a small area on the Earth's surface.
500
The term spring tide comes from an Old English word, springen meaning?
To jump
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