change in weight lesson 11. in our last lesson we learned about the water cycle. evaporation...
TRANSCRIPT
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Change in WeightLesson 11
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In our last lesson we learned about the water cycle.
Evaporation
Condensation
Precipitation
Run off
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Today we are going learn about how mass and weight are related.
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How are mass and weight related?
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Mass and weight are related but they are not the same. They are
two measures for an object.
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Mass is a physical characteristic of matter. Mass is the amount of matter in an object. Different
objects have different amounts of mass.
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What is matter?
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Weight is another physical property. Weight and mass are not the same thing. Weight is how hard gravity is
pulling on an object.
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While the mass of an object can stay constant depending where you measure it, it’s weight can
change.
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Weight is the pull of gravity on an object. The closer an object is to
the center of gravity the more it is going to weigh.
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Gravity is dependent on the size of an object. The bigger the object
the greater the gravitational pull.
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The weight of a person on Earth is much greater than the same
person on the moon because the gravitational pull on the moon is
much less.
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We weigh only 1/6th of our weight on the moon because the Moon is
1/6th of the Earth’s size.
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Even though the persons weight changes, the mass stays the same. Mass is not affected by gravitational pull.
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Mass will not change unless you add more mass to an object or
take more mass away.
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Mass will remain the same whether we are on the moon, the Earth or
anywhere.
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The confusing thing is that when people talk about how much they
weigh, they really are saying how
much mass they have.
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When someone says they have gained weight, they technically have gained mass. Mass of a
person changes depending on what they eat or how much
exercise they get.
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Weight will change when the gravitational pull changes.
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Mass is measured in Grams and Kilograms.
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We measure weight by Newtons.
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https://www.youtube.com/watch?v=-F5nmIJOF4U
Let’s watch this video about mass and weight.
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Let’s listen to this song about mass and weight.
https://www.youtube.com/watchv=1whMAIGNq7E&list=TL69zKYJui3JA song
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In our next lesson we will see how matter can be changed into
different properties.
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We will also learn to describe the different changes that take place
in matter.
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Good Job Today!
And remember to….
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See you next time!