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Biblioteka

ISD Grade 8 Science Midterm - 2023/2024

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Posljednje ažuriranje about 1 year ago
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Please read the questions carefully. Take your time. When you have questions, please let me know. You will have 65 minutes to work on this. Good luck. You got this!

Part 1: Vectors and Forces

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Part 2: Time & Distance Graphs

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Part 3: Velocity and Speed

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Part 4: Acceleration

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Part 4: Laws of Motion

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Part 7: Short Answer Questions

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Pitanje 1
1.

A vector describes a quantity's ________ and ________.

Pitanje 2
2.

A ______ is a place or object to which you compare to in order to determine motion.

Pitanje 3
3.

_____ is a change in position over time.

Pitanje 4
4.

An object with balanced forces acting on it would ________.

Pitanje 5
5.

Displacement is the total distance traveled during an event. (Explain if false, or rewrite the statement to make it true. Use the "Show your work" feature.)

Pitanje 6
6.
Pitanje 7
7.

Applied force and spring force are both examples of noncontact forces. (Explain if false, or rewrite the statement to make it true. Use the "Show your work" feature.)

Pitanje 8
8.

If the above vector diagram (from PhET, drip) represented someone's traveled path as shown by vectors a, b, and c, what distance did this person travel (in meters)?

Pitanje 9
9.

If the above vector diagram (from PhET, drip) represented someone's traveled path as shown by vectors a, b, and c, what was that person's total displacement (in meters)?

Pitanje 10
10.

Which of the above vector diagrams would best represent an airplane traveling into the wind (headwind)?

Pitanje 11
11.

If the net force on an object is 0 Newtons, then the forces acting on this object are _________.

Pitanje 12
12.

On time/distance graphs, the x-axis should always represent time. (Explain if false, or rewrite the statement to make it true. Use the "Show your work" feature.)

Pitanje 13
13.

On a time/distance graph, the y-axis represents the reference point. (Explain if false, or rewrite the statement to make it true. Use the "Show your work" feature.)

Pitanje 14
14.

Of the three graphs above, which one represents an object moving at an uniform (constant) speed? NOTE: position is the same as distance

Pitanje 15
15.

Of the three graphs above, which one represents an object not moving? NOTE: position is the same as distance

Pitanje 16
16.

Of the three graphs above, which one shows acceleration happening? NOTE: position is the same as distance

Pitanje 17
17.

Based on the graph above, of the three objects moving, which one is moving the slowest?

Pitanje 18
18.

On a time/distance graph, the slope represents ________.

Pitanje 19
19.

The above graph shows Mr. Siegel traveling from his home to the PhET merch store. During what time listed was Mr. Siegel most likely on a break during this trip?

Pitanje 20
20.

The above graph shows Mr. Siegel traveling from his home to the PhET merch store. Based on the graph, how far is the PhET merch store from Mr. Siegel's home?

Pitanje 21
21.

From the above graphs, what was the total distance traveled?

Pitanje 22
22.

From the above graph, which story best represents the graph?

Pitanje 23
23.

______ is how fast something is traveling in a specific direction.

Pitanje 24
24.

To find the numerical value that represents the velocity of an object, you must ________.

Pitanje 25
25.
Pitanje 26
26.

Based on the above velocity/time graph, which object is at rest?

Pitanje 27
27.

Based on the above velocity/time graph, which object is moving at a constant velocity?

Pitanje 28
28.

Based on the above velocity/time graph, object 1 is moving with the most acceleration. (Explain if false, or rewrite the statement to make it true. Use the "Show your work" feature.)

Pitanje 29
29.

On a velocity/time graph, a line with a downward slope (a line going down) means ___________.

Pitanje 30
30.

Match the distance/time graph with the correct velocity/time graph:

Stavka koja se može prevućiarrow_right_altOdgovarajuća stavka

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Pitanje 31
31.

Match the short story (or event) with the correct velocity/time graph:

Stavka koja se može prevućiarrow_right_altOdgovarajuća stavka

An object is accelerating at a constant rate.

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An object is accelerating, then maintaining a constant velocity, and then slowing down or decelerating.

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An object is slowing down, or decelerating, but not at a constant rate.

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An object is traveling at a constant velocity.

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Pitanje 32
32.

Which of the following would be a correct unit for acceleration?

Pitanje 33
33.
Pitanje 34
34.

An object moving with a constant acceleration is not increasing or decreasing its speed/velocity. (Explain if false, or rewrite the statement to make it true. Use the "Show your work" feature.)

Pitanje 35
35.

Acceleration can best be described as a change in ________________.

Pitanje 36
36.

Which scenario does NOT describe an example of acceleration?

Pitanje 37
37.
Pitanje 38
38.

Looking at the graphs above, which one shows an object increasing its speed/velocity?

Pitanje 39
39.

Which graph best shows an object decreasing its speed/velocity and then quickly increasing its speed/velocity:

Pitanje 40
40.

Which scientist came up with Newton's Laws of Motion?

Pitanje 41
41.

Match the law to the definition:

Stavka koja se može prevućiarrow_right_altOdgovarajuća stavka

Second Law of Motion

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Objects remain at rest or a constant velocity unless a force is applied

Third Law of Motion

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The force of an object is equal to the product of the mass and acceleration of the object

First Law of Motion

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For every action there's an equal and opposite reaction

Pitanje 42
42.
Pitanje 43
43.

Which statement best describes inertia?

Pitanje 44
44.

If the mass of an object stays the same, but the force increases, what happens to the acceleration?

Pitanje 45
45.

A force of 10 Newtons is applied to an object that weighs 10 kilograms, what is the acceleration of that object?

Pitanje 46
46.

Look at the Velocity vs. Time graph and consider Newton's 1st Law (the law of inertia). When is the net force acting on the car equal to zero?

Pitanje 47
47.

Based on the vector diagram above, answer the following questions. Be sure to answer all parts of this question for full credit.

- What is the distance traveled?

- What is the displacement? Explain what this means.

- What information would be needed to find the average speed? What information would be needed to find the average velocity?

Pitanje 48
48.

Look at the data below.

- What is the acceleration of the two objects?

- Which object is accelerating more?

Show how you arrived at your answer. Use the "Show your work" feature to show your calculations.

Subaru Outback - In 40 seconds, the car went from 18 m/s to 36 m/s.

Toyota Tacoma - In 25 seconds, the car went from 22 m/s to 8 m/s.

Acceleration = Change in Velocity / Time

OR

Acceleration = (final velocity - initial velocity) / (final time - initial time)

Pitanje 49
49.

Look at the graph above and tell a story. Try to be specific to best demonstrate that you understand the graph and its details.

Pitanje 50
50.

Look at the gif above. Connect the event to Newton's Three Laws of Motion. Be detailed and demonstrate that you understand Newton's Three Laws.

Pitanje 51
51.

Given the force arrow diagram above, what is the net force? Are the forces here unbalanced or balanced? Will the velocity of the box change? Why?

Be sure to answer all parts of this question for full credit.