Gravity
True or False: The force of gravity acts on all objects with mass.
True. Gravity acts on all objects with mass, no matter how big or small.
This is what it is called when Earth spins on its axis.
Rotation
When are the hours of daylight and nighttime about the same?
During the spring and fall equinoxes.
True or false: The moon only comes out at night.
False - The moon can sometimes be seen during the day.
A dark area or shape that is made from blocked light.
A shadow.
What would happen if gravity suddenly stopped acting on Earth?
If gravity stopped acting on Earth, objects would float off into space.
The side of Earth that faces the sun experiences ___.
During the summer solstice, what happens to the sun and shadows?
The sun appears much higher above the horizon, so shadows are at their shortest.
You can see the surface of the moon because...
sunlight reflects off its surface.
Connected.
Related.
It needs to reach "escape velocity" in order to leave Earth's gravitational pull.
Earth's tilt and revolution affect how much ____ ____ different places on Earth receive at different times of the year.
Why do some stars and/or constellations appear much brighter than others?
They are closer to Earth than other stars or constellations.
29.5 days.
The amount of time it takes for one complete cycle of moon phases.
A repetition of events or objects.
A pattern.
What force works against gravity, when an object is falling?
Air resistance pushes up against an object when it is falling.
This is the movement of one object in space around another object in space.
Revolution
Why do constellations seem to move across the night sky, or disappear completely during certain months?
The Earth rotates and revolves around the sun, which causes the constellations to appear to move and disappear.
Describe what you see during a waxing gibbous moon phase.
More and more of the moon's lighted half is visible.
Applies.
Exerts.
Give an example of gravity in action.
Example: A person jumping and then coming back down is an example of gravity in action.
When the tilt of the Earth's axis is away from the sun, what season does the northern hemisphere experience, and what does it mean for our hours of daylight?
This device helped ancient people keep track of time.
A sundial.
During a new moon, which side of the moon faces Earth, and why can't we see the moon?
During a new moon, the moon's dark, unlighted side faces Earth, and we can't see the moon because the sun's light is shining on the opposite side.
The imaginary line that goes through the center of an object.
An axis.