Share Science L6 Gravity Tides and Planets
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Gravity is the force of _____________. space OR attraction
Atrraction
What 2 factors affect gravitational force? Mass and distance OR mass and time
Mass and distance
What is mass? How much something weighs OR the forces on that object
How much something weighs
What is weight? How much something weighs OR the force on that object
Force
Is your mass different on Mars or the Moon?
No
What keeps the moon in orbit around the earth?
Gravitational pull between the 2 objects
What causes tides of the sea?
Gravitational pull of the moon
How many tides in 24 hours? How many low and how many high tides? Is it 4 or 6 or 2
2 and 2 makes 4 tides in a day
What is very high and very low tide called?
Neap tide and Spring tide
Why do we need to know when tides happen?
Ships can predict tides so they know where to sail
Accretion is how more material is added for an object to become larger. True or false
True
As an object increases in size, does its gravity increase or decrease?
Increase gravity
What is the center of mass of an object? Where gravity comes from OR where gravity is going to
Going to
Is earth a perfect sphere?
No
What gives earth its bulging shape at the sides? Gravitational force OR centrifugal force?
Centrifugal
Where would you weigh more? At the equator or at the poles?
Poles
