Variables
Independent Variable
the variable the researcher changes
gravity
causes objects in space to be held together in orbits and keep them moving along their current paths
what causes the change in tides
the gravitational force from the moon
The high tide at a beach is 4 meters above sea level, and the low tide is 1 meter above sea level.
Question: What is the tidal range at this beach?
Tidal range = High tide - Low tide
= 4−1=3
4−1=3 meters
What Galaxy is planet earth found in?
The Milky Way
Dependent variable
the data you're collecting
rotation
the spinning of an object around its own axis
Neap tides
occurs when the sun and moon's gravity pull on earth's oceans in different directions
happens during the 1st and 3rd quarter moons
A coastal town has a low tide that is 0.5 meters below sea level and a high tide that is 3 meters above sea level.
Question: What is the tidal range here?
Tidal range = High tide - Low tide
= 3−(−0.5)=3+0.5=3.5
3−(−0.5)=3+0.5=3.5 meters
what is the smallest structure of the Universe?
moon
control variable
the variables that should be kept the same
revolution
the movement of an object around another object with greater mass
high tides vs. low tides
high tides: when the oceans move inward on beaches
low tides: occurs when the moon and sun's gravitational pull on earth causing the ocean water to bulge towards them.
The high tide at a lake shore is 3 meters above sea level, and the low tide is 1 meter above sea level.
Question: What is the tidal range at this lake shore?
Tidal range = High tide - Low tide
= 3−1=2
3−1=2 meters
as mass increases
gravity increases
where is the independent variable placed on a graph?
x-axis
tides
the rising and falling of the world's oceans
spring tides
occur when the sun and moon's gravity pull on earth's oceans in the same direction
larger high tide bulges
A beach has a high tide of 5 meters above sea level and a low tide of 1 meter below sea level.
Question: What is the tidal range at this beach?
Tidal range = High tide - Low tide
= 5−(−1)=5+1=6
5−(−1)=5+1=6 meters
as distance increases
gravity decreases
where is the dependent variable placed on a graph?
y-axis
student will respond
formula for tidal range
tidal range = high tide - low tide
A beach has a high tide of 3.5 meters above sea level and a low tide of 0.7 meters below sea level.
Question: What is the tidal range at this beach?
Tidal range = High tide - Low tide
= 3.5−(−0.7)=3.5+0.7=4.2
3.5−(−0.7)=3.5+0.7=4.2 meters
So, the tidal range at this beach is 4.2
4.2 meters.
structures of the Universe from smallest to largest (hint: there are 8)
Moons → Planets → Stars → Solar Systems → Galaxies → Galaxy Groups → Superclusters → Universe