Notes

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SPI 0807.12.5 Gravity-Mass and Distance
Notes
Science
Tennessee SPI Objective Determine the
relationship among the mass of objects, the
distance between these objects, and the amount
of gravitational attraction.
Instructions 1) First click on "View" from the
top-menu bar. 2) Then click on "Slide Show" from
the drop-down menu. 3) Then use the right-arrow
button on your keyboard to advance through this
presentation.
Check for Understanding Identify factors that
influence the amount of gravitational force
between objects
Essential Question(s) What is gravity? What is
mass? How does mass and distance affect
gravitational pull?
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SPI 0807.12.5 Gravity-Mass and Distance
Science
Notes

• Gravity
• is a mysterious force found everywhere in the
  universe that pulls particles of matter together
• Key Concept Gravity is a pulling force (not a
  pushing force)
• Law of Universal Gravitation
• F.Y.I -Isaac Newton is credited with defining
  this law
• The law states that gravity is everywhere in our
  universe, and that its attractive force changes
  based on mass and distance.
• Summary Every particle of matter is attracted to
  every other particle of matter.

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• Mass Affects Gravity
• Objects with more mass have stronger gravity
• Look below (bowling ball and a baseball) both
  objects are made of matter, so both objects have
  gravity.
• So both objects are being pulled towards each
  other.
• Yet the ball with more mass (bowling ball) has
  more gravity.
• Therefore its pull is stronger (view animation)

Diagram 01
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• Mass Affects Gravity
• The example of a bowling ball and a baseball is
  similar to the gravity effect with a planet and a
  moon

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SPI 0807.12.5 Gravity-Mass and Distance
Notes
Science

• Mass Affects Gravity
• Look below (baseball and a golf ball) both
  objects are made of matter, so both objects have
  gravity.
• So both objects are being pulled towards each
  other.
• Yet the ball with more mass (baseball) has more
  gravity.
• Therefore its pull is stronger (view animation)
• This is similar to the gravity effect with a moon
  and a asteroid

Diagram 02
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SPI 0807.12.5 Gravity-Mass and Distance
Science
Notes

• Distances Affects Gravity
• Effect of gravity increases when objects are
  closer together.
• Effect of gravity decreases when objects are
  farther apart.
• In diagram 01 the two soccer balls are 5m apart.
  
• In diagram 02 the two soccer balls are 10m apart.

Gravitation attraction is greatest when they are
closer together.
Diagram 01
5 meters
Diagram 02
10 meters
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SPI 0807.12.5 Gravity-Mass and Distance
Science
Notes

• Gravity and the Theory of Relativity
• Albert Einstein theorized that mass
  warps/bends/curves space and this warping
  explains the force we call gravity

• Watch both of these Youtube videos
• Write down three things that catch your
  attention, and be ready to share afterwards.
• Link Curvature of Space-Time (34 sec)
• Link How Gravity Really Works (1 min 45 sec)

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Quick Review
SPI 0807.12.5 Gravity-Mass and Distance
Science
1) What is the name of the law about gravity? The
law of A) Conservation of Mass or B)
Universal Gravitation (2) All matter in the
universe attracts other matter by? A) A pushing
force or B) A pulling force (3) The
strength of gravity depends on the ______ of the
objects A) Masses or B) Shape 4) Effect of
gravity depends on the _____ between the
objects. A) Energy or B) Distance 5) What did
Einstein say about mass and gravity? A) That mass
warps space or B) Mass and gravity are the
same
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SPI 0807.12.5 Gravity-Mass and Distance
Science
Questions
Here is an example of a question you might see on
a quiz or test.
10
SPI 0807.12.5 Gravity-Mass and Distance
Science
Questions
Here is an example of a question you might see on
a quiz or test.
11
SPI 0807.12.5 Gravity-Mass and Distance
Science
Questions
Here is an example of a question you might see on
a quiz or test.
12
SPI 0807.12.5 Gravity-Mass and Distance
Science
Questions
Here is an example of a question you might see on
a quiz or test.
13
SPI 0807.12.5 Gravity-Mass and Distance
Science
Questions
Here is an example of a question you might see on
a quiz or test.