moon Flashcards
what is Force?
Any influence that changes physical properties.
what is Mass
a measure of the amount of matter that makes up an object.
how big is the moon
1/4 the size of earth
how much gravity does the moon have
1/6 as much as earths
the moon orbits the earth every… and it’s called a ______
27.3 days. Lunar month.
what is it called when the moon comes between the sun and earth?
a solar eclipse.
full moon =
lunar eclipse
what causes the moon phases?
earths Shadow and reflective light from the sun.
what causes the moon to shine?
the suns light and reflective light.
3 effects the moon has on earth
Tides, Seasons, keeps u/s from wobbling off of our tilt.
tides change about every ____
12.5 hours
suns gravity is _____ times stronger
330, 000.
a total solar eclipse happens every ____ years
1.5
a partial solar eclipse happens when_____
the penumbra is casted.
a partial solar eclipse…
cannot block out 100% of the suns rays.
a lunar eclipse occurs during the ________
full moon phase when earth blocks sunlight from reaching the moon
lunar eclipses can only happen during a full moon because…….
the moon is closest to earth’s Shadow at that time.
sunspots are
relatively dark, cool spots on the suns surface.
umbra temp is
6600F or 3400C
how are sunspots made?
when the suns magnetic field loops up out of the solar surface and cools it slightly.
how hot are sunspots.
2700F or 1500C
arouras are made by
interactions with the sun and magnetosphere.
The length of day is based on
the Earth rotating on its axis
the Earth rotating on its axis
true.
What causes the phases of the Moon?
The Moon’s position relative to Earth & The Sun
Earth’s gravity pulls everything towards the ____.
center
What factors influence the strength of attraction (gravity) between two objects?
mass and distance.
Gravity keeps the planets in orbit around the sun.
true
Galileo observed Jupiter had four moons, sunspots, and mountains on the moon with a telescope.
true
The number of sunspots and solar activity in general peaks
every 11 years
Which astronomer first discovered the sunspots on the surface of the sun?
Galileo Galilei
When compared to the gases around them, sunspots are ______.
cooler
Layers of the sun…
core, radiation zone, convection zones, photosphere, chromosphere & corona
Three types of solar energy are ultraviolet radiation, solar radiation, and infrared radiation
true
The closer the radiometer was to the lamp, the _____ and ______ it spun.
faster and longer
Which of these would be shorter if Earth rotated faster?
days
The time required for the Earth to orbit the sun once is called a
year.
What is the main cause of tides on Earth?
gravity
Why do we NOT have lunar or solar eclipses all the time?
Moon’s orbit is tilted relative to the Earth
Solar eclipses occur…
less often than lunar eclipses
How long do total solar eclipses last?
anywhere from a few seconds to a few minutes.
Total, Partial, and Annular are the three types of Lunar Eclipses.
nah uh.
Total, Partial, and Annular are the three types of Lunar Eclipses.
