Chapter 1 lesson 3
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Force | A force is a push or pull
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| Gravity | Force that attracts objects toward each other. It pulls the moon toward Earth, keeping it in orbit.
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| The strength of the force of gravity between two objects depends on what two factors? | the masses of the object and the distance between them
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| Law of universal gravitation | states that every object in the universe attracts every other object.
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| Mass | is the amount of matter in an object.
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| Weight | the measure of force of gravity on an object
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| How does mass affect the force of gravity? | the more mass an object has, the greater the force it can exert
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| How does distance affect the force of gravity? | the greater the distance between two objects, the smaller the force of gravity
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| Inertia | The tendency of an object to resist a change in motion.
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| Newton's first law of motion | states that an object at rest will stay at rest and an object in motion will stay in motion with a constant speed and direction unless acted on by a force.
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| Why do the Earth and moon remain in orbit? | Newton concluded that inertia and gravity combine to keep Earth in orbit around the sun and the moon in orbit around Earth.
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| What keeps Earth from falling into the sun? | The answer is inertia
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| What orbits another object and can be natural or man made? | A satellite
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| During the Apollo 15 free fall experiment, which object fell at the same rate as the hammer? | A feather because there in no air resistant on the moon.
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| What was the purpose of the Apollo 15 free fall experiment? | To test whether the objects would fall at the same rate of speed.
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
ldillon
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