ASTR 105G LAB 01A

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What is the density of Earth?
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Quiz Questions 1) What is density?
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Quiz Questions 1) What is density? 2) What
is the density of Earth?
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Quiz Questions 1) What is density? 2) What
is the density of Earth? 3) What is your
favorite color?
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Mass
________
Density
Volume
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Mass
________
Density
Volume
Mass is how much stuff an object has. (stuff
protons and neutrons)
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Large mass
Small mass
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Mass
________
Density
Volume
Mass is how much stuff an object has. (stuff
protons and neutrons)
Volume is how much space an object takes up.
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Large volume
Small volume
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Mass
________
Density
Volume
Density is how much stuff is in a given space.
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Mass
________
Density
Volume
Density is how much stuff is in a given space.
If mass is in grams...
3
And volume is in cm ...
3
Then density is grams/cm .
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The density of water is 1, because 1 gram of water
takes up one cubic centimeter of space.
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Density of Earth...
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Density of Earth... Mass of Earth
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Density of Earth... Mass of Earth / Volume of
Earth
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Density of Earth... Mass of Earth / Volume of
Earth
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Volume of Earth
Volume 4/3 p radius3
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Volume of Earth
Volume 4/3 p radius3
Circumference 2 p radius
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Volume of Earth
Volume 4/3 p radius3
Circumference 2 p radius
If we know circumference, we know volume
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Circumference distance 360/?
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Circumference distance 360/?
Circumference 1 in 360/90 1
in 4 4 in
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Mass of Earth
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Mass of Earth
More mass ? more gravity ? things fall faster
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Mass of Earth
Measure how fast something falls
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Mass of Earth
Measure how fast something falls ? Acceleration
due to Earth's gravity
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Mass of Earth
Measure how fast something falls ? Acceleration
due to Earth's gravity ? Mass of Earth
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Mass
________
Density
Volume