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Astronomy > Earth In Space #1 > Flashcards

Earth In Space #1 Flashcards

1
Q

He was an English Scientist, and the first person to realize that gravity exists everywhere. (1660s)
Who was he?

A

Isaac Newton

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2
Q

Law of Universal Gravitation states that:

A

Every object in the universe attracts every other object.

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3
Q

Every object in the universe attracts every other object. What’s the name of the law?

A

Law of Universal Gravitation

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4
Q

What does LUG stands for?

A

Law of Universal Gravitation

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5
Q

What is gravity?

A

Gravity is the force of attraction based on the mass of two objects and distances between the two objects.

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6
Q

What is the name of the force of attraction based on the mass of two objects and distances between the two objects?

A

Gravity

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7
Q

What is mass?

A

Amount of matter in an object

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8
Q

What is the amount of matter in an object?

A

Mass

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9
Q

What is the force of gravity on an object?

A

Weight

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10
Q

What is weight?

A

The force of gravity on an object

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11
Q

What does Newton’s first law of motion states?

A

An object at rest will stay at rest and an object in motion will stay in motion with constant speed and direction unless acted on by a force.

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12
Q

What is the law that says: An object at rest will stay at rest and an object in motion will stay in motion with constant speed and direction unless acted on by a force?

A

Newton’s First Law of Motion

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13
Q

What is an orbit?

A

Path followed by an object as it travels around a larger object

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14
Q

What is the path followed by an object as it travels around a larger object?

A

Orbit

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15
Q

What keeps Earth in Orbit?

A

Newton concluded that two factors -inertia and gravity- combine to keep Earth in orbit

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16
Q

Newton concluded that two factors -_____ and ______ - combine to _____ ____ ___ ____ .

A

Newton concluded that two factors -inertia and gravity- combine to keep Earth in orbit.

17
Q

What is inertia?

A

Resistance of any physical object to any change in its state of motion, including speed and direction. It is the tendency of objects to keep moving on a straight line at constant velocity.

18
Q

Resistance of any physical object to any change in its state of motion, including speed and direction. It is the tendency of objects to keep moving on a straight line at constant velocity. What is this?

A

Inertia

19
Q

What are the two movements that Earth practices?

A

Rotation and Revolution

20
Q

What is rotation?

A

Time it takes something to spin around its axis (a day)

21
Q

What is the time it takes something to spin around its axis (a day) ?

A

Rotation

22
Q

What is revolution?

A

Time it takes something to make a complete orbit ( A year)

23
Q

What is the time it takes something to make a complete orbit ( A year) ?

A

Revolution

24
Q

Who was Isaac Newton and what did he do?

A

He was an English Scientist, and the first person to realize that gravity exists everywhere. (1660s)

Astronomy (8 decks)

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