9Th Grade Science Chapter 9 Test

Front 1

When is an object in motion?

Back 1

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Front 2

What is a reference point?

Back 2

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Front 3

How can you determine if an object is in motion in relation to a reference point?

Back 3

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Front 4

Why is it important for hte reference point to be stationary?

Back 4

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Front 5

Name some good reference points.

Back 5

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Front 6

Suppose you are riding in a train. Describe your motion relative to the train.

Back 6

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Front 7

Suppose you are riding in a train. Describe your motion relative to the buildings outside.

Back 7

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Front 8

Suppose you are riding in a train. Describe your motion relative to the sun.

Back 8

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Front 9

Now suppose you walk to the back of the train while the train is in motion. Describe how an observer outside would see your motion, and how a passenger on the train would see your motion.

Back 9

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Front 10

Suppose you are on the train in a subway and you look out the window and see a train enxt to you. The other train begins to move but you feel as though your train is moving backwards. Explain what is happening.

Back 10

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Front 11

9. If you are riding on a bike traveling 15 km/h and a car approaches you traveling 30 km/h, relative to the bike, how fast is the car going?

Back 11

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Front 12

10. How fast would the car be going relative to the bike if the car was traveling in the same direction as the bike (refer to units from #9)?

Back 12

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Front 13

11. If the car and bike were traveling side by side at 20 km/h, what would the bikes motion be relative to the car?

Back 13

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Front 14

12. What does SI stand for?

Back 14

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Front 15

What is the metric unit for distance?

Back 15

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Front 16

What unit is used for length, width, and height?

Back 16

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Front 17

Metric Prefixes

Back 17

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Front 18

Convert for English to Metric System

Back 18

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Front 19

What is a geocentric model of the solar system?

Back 19

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Front 20

What is a heliocentric model of the solar system?

Back 20

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Front 21

Write a sentence about a geocentric model of the solar sentence using the words "reference point."

Back 21

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Front 22

Write a sentence about a heliocentric model of the solar system using the words "reference point."

Back 22

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Front 23

How can you calculate the speed of an object in motion?

Back 23

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Front 24

What is average speed?

Back 24

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Front 25

What is instantaneious speed?

Back 25

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Front 26

If an asteroid travels 4500km in 60 sec, what is its speed?

Back 26

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Front 27

If a cyclist travels 20 miles in 30 minutes, what is the cyclist's average speed?

Back 27

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Front 28

24. If a cyclist looks at his odometer and it reads 20 km/h, he has read his ___________________ speed

Back 28

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Front 29

25. Be able to distinguish between graphs showing:
constant speed on both a speed and acceleration graph, changing speed, zero speed, constant acceleration on a speed and acceleration graph

Back 29

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Front 30

What is the difference between speed and velocity?

Back 30

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Front 31

How do you know that all objects in motion have speed?

Back 31

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Front 32

Arrows that show direction are called?

Back 32

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Front 33

Graph - How are the speed of the motorbike and the speed of the car different?

Back 33

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Front 34

Acceleration, along with velocity, has ______________?

Back 34

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Front 35

Explain why these statements are true:
a. When you step on the gas, you accelerate.
b. When you apply the brake, you accelerate.
c. When you change directions, you accelerate.

Back 35

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Front 36

What must change for an object to accelerate?

Back 36

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Front 37

A biker is being chased by a dog so he quickly goes from 15 m/s to 40 m/s in 10 seconds. What is the biker's acceleration?

Back 37

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Front 38

A boy on a skateboard starts t go down a hill but realizes he's about to crash so he puts his foot down to try to stop. His speed as he begins travelling down the hill is 15mi/, but his able able to slow himself to 7mi/h. It takes him 0.2 h to slow down. What is his acceleration? (negative acceleration).

Back 38

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Front 39

What does a graph of constant acceleration look like?

Back 39

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Front 40

To what speed graph does a graph of constant acceleration correspond to?

Back 40

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Front 41

What does a graph of negative acceleration look like?

Back 41

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Front 42

What does a graph of no acceleration look like?

Back 42

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Front 43

Is a person riding on a Ferris wheel who is traveling at a constant speed, accelerating? How do you know?

Back 43

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Front 44

Speed is a _______ quantity while both acceleration and velocity are _________ quantities.

Back 44

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