Log in
Sign up for FREE
arrow_back
Library

ISD Grade 8 Science Midterm - 2023/2024

star
star
star
star
star
Last updated 9 months ago
51 questions
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!
1
1
1
1
1
3
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
2
1
1
1
1
4
4
1
2
1
1
1
3
1
1
1
3
1
1
1
1
1
4
4
3
3
3

Part 1: Vectors and Forces

Question 1
1.

A vector describes a quantity's ________ and ________.

Question 2
2.

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

Question 3
3.

_____ is a change in position over time.

Question 4
4.

An object with balanced forces acting on it would ________.

Question 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.)

Question 6
6.
A force is defined as a _______ or a _______. As vectors, all forces have both _______ and _______. Force is measured with a scientific unit called _______ .
Question 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.)

Question 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)?

Question 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)?

Question 10
10.

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

Question 11
11.

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

Part 2: Time & Distance Graphs

Question 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.)

Question 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.)

Question 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

Question 15
15.

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

Question 16
16.

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

Question 17
17.

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

Question 18
18.

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

Question 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?

Question 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?

Question 21
21.

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

Question 22
22.

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

Part 3: Velocity and Speed

Question 23
23.

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

Question 24
24.

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

Question 25
25.
A _______ is a quantity that has both size and direction. _______ is a vector quantity because it has speed in a specific direction. Average speed depends on the total _______ traveled along a path. Average velocity depends on the _______ of an object.
Question 26
26.

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

Question 27
27.

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

Question 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.)

Question 29
29.

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

Question 30
30.

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

Draggable itemarrow_right_altCorresponding Item
arrow_right_alt
arrow_right_alt
arrow_right_alt
arrow_right_alt
Question 31
31.

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

Draggable itemarrow_right_altCorresponding Item
An object is traveling at a constant velocity.
arrow_right_alt
An object is slowing down, or decelerating, but not at a constant rate.
arrow_right_alt
An object is accelerating at a constant rate.
arrow_right_alt
An object is accelerating, then maintaining a constant velocity, and then slowing down or decelerating.
arrow_right_alt

Part 4: Acceleration

Question 32
32.

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

Question 33
33.
_______ is the change in position/distance over time in a certain direction. _______ is the change in velocity over time.
Question 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.)

Question 35
35.

Acceleration can best be described as a change in ________________.

Question 36
36.

Which scenario does NOT describe an example of acceleration?

Question 37
37.
The slope on a distance/time graphs tell us the_______ . The slope on a velocity/time graph tells us the _______ . The slope on an acceleration/time graphs tells us the _______ .
Question 38
38.

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

Question 39
39.

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

Part 4: Laws of Motion

Question 40
40.

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

Question 41
41.

Match the law to the definition:

Draggable itemarrow_right_altCorresponding Item
First Law of Motion
arrow_right_alt
Objects remain at rest or a constant velocity unless a force is applied
Second Law of Motion
arrow_right_alt
The force of an object is equal to the product of the mass and acceleration of the object
Third Law of Motion
arrow_right_alt
For every action there's an equal and opposite reaction
Question 42
42.
A force is simply a _______ or a _______ .
Question 43
43.

Which statement best describes inertia?

Question 44
44.

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

Question 45
45.

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

Question 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?

Part 7: Short Answer Questions

Question 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?

Question 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)

Question 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.

Question 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.

Question 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.