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WorksheetsTides
Total questions: 21
Worksheet time: 21mins
Name
Class
Date
1.
Gravity is a force, and it weakens with _____
a)
distance
b)
time
c)
velocity
d)
acceleration
2.
When calculating gravity, we measure from _____
a)
the center of mass of an object
b)
the surface of an object
c)
sea level
d)
the closest point to a second object
3.
Right now, how far are you from the center of the Earth?
a)
about 64 km
b)
about 640 km
c)
about 6,400 km
d)
about 64,000 km
4.
The change in the force of gravity over distance is what astronomers call _____
a)
the dynamic force
b)
the concentric force
c)
the tidal force
d)
centripetal force
5.
The overall effect of the tidal force is to _____
a)
compress an object
b)
stretch an object
c)
apply a shear force to an object
d)
rotate an object
6.
Compared to the center, the side of Earth facing the Moon feels a _____ pull toward the Moon
a)
sideways
b)
intermittent
c)
faster
d)
stronger
7.
Where the tidal force is strongest, we say it's _____
a)
low tide
b)
high tide
c)
neap tide
d)
no tide
8.
Where the tidal force is weakest, we say it's _____
a)
low tide
b)
high tide
c)
spring tide
d)
no tide
9.
What is the time between high tide and low tide?
a)
about 2 hours
b)
about 6 hours
c)
about 12 hours
d)
about 24 hours
10.
There are two high tides and two low tides every _____
a)
hour
b)
day
c)
week
d)
month
11.
In general, the ocean tide causes the sea level to rise and fall by
a)
one or two centimeters
b)
ten or twenty centimeters
c)
one or two meters
d)
ten or twenty meters
12.
The tidal force stretches the solid Earth by about _____
a)
3 centimeters
b)
30 centimeters
c)
3 meters
d)
30 meters
13.
The Moon is receding (moving away from the Earth) at a speed of a few centimeters per _____
a)
day
b)
week
c)
month
d)
year
14.
Due to the Moon's pull, the length of Earth's day is _____
a)
becoming shorter
b)
becoming longer
c)
held constant
d)
oscillating
15.
What is it called when a moon shows the same face toward it's home planet?
a)
force linking
b)
phase matching
c)
tidal locking
d)
face clamping
16.
During which moon phase are the Earth, Moon, and Sun in a line?
a)
new moon
b)
first quarter
c)
full moon
d)
third quarter
17.
Which tides are associated with a new or full moon?
a)
spring tides
b)
neap tides
c)
high tides
d)
low tides
18.
Which tide is associated with the least difference between high and low water?
a)
spring tides
b)
neap tides
c)
high tides
d)
low tides
19.
How long is it between spring and neap tides?
a)
a day
b)
72 hours
c)
a week
d)
a month
20.
The extra-strong tides, due to the Moon's elliptical orbit, are called _____
a)
neap tides
b)
spring tides
c)
proxigean tides
d)
promethean tides
21.
The stretching of an object due to extreme tidal forces is called _____
a)
noodle-pulling
b)
spaghettification
c)
pastafarianism
d)
linguine-stretching
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