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Science > Chapter 9 > Flashcards

Chapter 9 Flashcards

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1
Q

Motion

A

When distance from another object is changing

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2
Q

Reference point

A

A place or object used for comparison to determine if something is in motion

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3
Q

Relative motion

A

Whether or not an object is in motion depends on the reference point

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4
Q

International system of units

A

System of measurement scientists use

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5
Q

Speed

A

The distance an object travels per unit of time

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6
Q

Formula for speed

A

Speed= distance/time

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7
Q

Formula for Average speed

A

The total distance divided by total time

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8
Q

Instantaneous speed

A

The rate at which an object is moving at a given instant in time

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9
Q

Velocity

A

Speed in a given direction

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10
Q

Slope

A

Steepness of a line on a graph

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11
Q

Formula for calculating slope

A

Slope= rise\ run
OR
Y2- Y1/x1-x2

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12
Q

An object is in___ when its distance from another object is changing

A

Motion

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13
Q

An object is in motion if it changes position relative to a ___.

A

Reference point

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14
Q

What is the basic unit of length in SI?

A

Meter

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15
Q

How many centimeters are in a meter?

A

100

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16
Q

How many meters are in a kilometer?

A

1000

17
Q

If given a speed of an object, what do you need to know to determine its velocity?

A

Direction of motion

18
Q

Acceleration

A

The rate at which velocity changes

19
Q

What does acceleration refer to?

A

Increasing speed, decreasing speed, and change in direction

20
Q

What is the formula for acceleration?

A

Final speed -initial speed over time

21
Q

What can you use a speed vs. time graph and a distance vs. time graph for?

A

To analyze the motion of an accelerating object

22
Q

For a speed vs. time graph, what does it mean if the line is going upward?

A

That the speed is increasing

23
Q

What does it mean if the line is straight for a speed vs. time graph?

A

That the acceleration is constant

24
Q

For a distance vs. time graph, what does a curved line mean?

A

That the object is accelerating

25
Q

What does it mean if the line is straight for a distance vs. time graph?

A

That the object is not moving

26
Q

How many centimeters are in a meter?

A

100

27
Q

How many meters are in a kilometer?

A

1,000

28
Q

How many millimeters are in a meter?

A

1,000

29
Q

How many millimeters are in a centimeter?

A

10

30
Q

How many kilometers are in a meter?

A

.001

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