gravity, eclipses and tides review
the moon's gravity is 1/6 of earth's gravity. if you weigh 100 newtons on earth how much do you weigh on the moon
16.667 newtons
How many low tides occur a day
2
how many tides occur a day
2
how many hours pass between high/low tides
6 hours
at one beach, high tide occurs at 8am when will the next high tide most likely occur
8pm
What is gravity
A force that pulls objects toward each other
The moon's gravity affects:
Both the solid parts of the earth and the oceans
High tides occur
On the side of the earth facing the moon, and also the opposite side
which of these would have the strongest gravitational pull
a large dense star
According to Einstein gravity:
bends time and space
what effect does the moon's gravity have on earth:
causes tides
which term best describes the rise and fall of the oceans water level
ceaseless
Mass is measured in
grams
the greater the mass the more
gravity
Compared to the Moon's effect on tides, the Sun's effect is about
half that of the moon shows how the positions of the sun and the moon effects earths tides
tidal bulge occurs an:
high tide occurs
true statement about gravity
it acts on all matter in the universe
true statement about tidal energy
it causes very little pollution
when you go to the moon, your weight will be
less
Gravity depends on
mass and distance
a tidal bulge occurs in oceans on opposite sides of earth because:
moon's gravity is slightly stronger on the side of earth closest to the moon and slightly weaker on the side of earth opposite the moon
marble will role to the planet with
more mass
weaker tides occur 1st/3rd quarter:
neap tides
Mass is a measurement of
number of particles
Weight is measured in
pounds
which motion of earth causes tides to change through out the day:
rotation
During the full and new moon
spring tides occur
when you go to Jupiter your mass will
stay the same
The tides on earth are caused by the difference in:
strength of the moon's gravity on opposite sides of earth
in a neap tide, the moon's effect on tides is reduced due to the effect of
suns effect on tides (sun's gravity)
Why is the earth's gravity stronger than the moon's gravity?
the earth is more massive than the moon
the smaller the mass:
the less gravity they'll be
moon effect tides on earth but Jupiter doesn't because
the moon is closer
If the sun is bigger than the moon, why does the moon have a greater effect on tides?
the moon is much closer than the sun
the closer objects are to each other:
the more gravity there will be
what might happen if the moon were only half as large as it is now
the ocean level would rise and fall less dramatically
according to newtons laws, what might happen to the earth if it's orbit moved farther away from the sun
the sun's gravitational pull on the earth would decrease
How does the sun's gravity compare to the earth's gravity?
the sun's gravity is stronger
tides are higher and lower during spring tides because
the sun's/moon's gravitational pull effect combines and produces higher high tides and lower low tides
a neap tide results in lower high tides and higher low tides because
the sun, earth, and moon form a right angle
what theory did Einstein introduce to challenge newton's ideas
the theory of relativity
what would you expect to happen to the number of high tides in any given area if the rate of earth's rotation doubles
they will occur about twice as often
what might happen on a beach as the tide goes out
they'll be more sand for beachgoers to sunbathe
Rise and fall of ocean water through out the day
tides
Difference between mass and weight
weight changes depending on location, mass never changes