ISD Grade 8 Science Midterm - 2023/2024

Last updated 12 months ago

51 questions

Instructions

1

3

1

2

1

4

1

2

1

3

1

3

1

4

3

Library

ISD Grade 8 Science Midterm - 2023/2024

Last updated 12 months ago

51 questions

Instructions

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 

1

3

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

1

Part 2: Time & Distance Graphs 

1

Part 3: Velocity and Speed 

1

2

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. 

1

4

Draggable item		Corresponding Item

4

Draggable item		Corresponding Item

Part 4: Acceleration 

1

2

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

1

3

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 _______ .

1

Part 4: Laws of Motion 

1

3

Draggable item		Corresponding Item

1

A force is simply a _______ or a _______ .

1

Part 7: Short Answer Questions 

4

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?

4

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)

3

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

3

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.

3

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.

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 

A vector describes a quantity's and .

speed and velocity 

magnitude and direction 

force and reference point

position and direction 

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

x and y axis 

position 

velocity 

reference point 

_____ is a change in position over time.

Vector 

Velocity 

Motion 

Distance

An object with balanced forces acting on it would ________.

change direction

maintain a constant velocity

have a positive net force acting on it

change speed 

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.)

True

False

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

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.)

True

False

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)?

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)?

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

C

B

A

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

balanced 

unbalanced 

Part 2: Time & Distance Graphs 

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.)

True

False

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.)

True

False

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

1

2

3

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

1

2

3

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

1

2

3

2 and 3

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

A

B

C

All the objects are at rest

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

how long the object is traveling for 

how far the object is from the reference point 

how far the object has traveled 

how fast the object is traveling 

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?

11:00

10:15

9:30

9:45

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?

90 miles 

40 miles

50 miles

80 miles

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

0 kilometers 

150 kilometers

120 kilometers 

60 kilometers 

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

A car left the home traveling at a constant speed, then accelerated for 30 mins. It then took a 1-hour break and returned home, which took 90 minutes. 

A car left the home traveling at a constant speed for two hours, then took a 1-hour break. The car then traveled again at a constant speed, but faster, for 30 min. Finally, the car returned home at a constant speed.

A car left the home accelerating for two hours and then took a 1-hour break. It then accelerated even more for 30 mins. It then returned home during which it decelerated. 

A car left home traveling at a constant speed for two hours, then took a 1-hour break. The car then traveled again at a constant speed, but slower, for 30 min. Finally, the car returned home at a constant speed. 

Part 3: Velocity and Speed 

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

Speed

Velocity 

Dak Prescot 

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

Multiply the change in time with the change in direction 

Divide the change in time by the change in distance (or displacement)

Divide the change in distance (or displacement) over the change in time 

Divide the change in speed over the change in time 

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. 

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

1

2

3

All objects are moving 

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

1

2

3

All objects are moving at a constant velocity

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.)

True

False

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

the object is at rest 

the object is returning to the reference point 

the object is changing directions 

the object is slowing down 

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

Draggable item		Corresponding Item

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

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

Part 4: Acceleration 

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

meters per second squared 

meters per second 

miles per hour 

kilometers per hour heading southwest 

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

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.)

True

False

Acceleration can best be described as a change in ________________.

speed 

speed and/or direction 

direction 

magnitude and/or velocity 

Which scenario does NOT describe an example of acceleration?

A car maintains a constant speed while driving straight ahead. 

A car maintains a constant speed while turning to the right. 

A car decreases its speed while driving straight ahead. 

A car increases its speed while turning to the left. 

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 _______ .

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

Graph (a)

Graph (b)

Neither graph shows an object increasing its speed 

Both graphs show an object increasing its speed

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

Part 4: Laws of Motion 

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

Rosalind Franklin 

Albert Einstein 

Issac Newton

Deion Sanders 

Match the law to the definition:

Draggable item		Corresponding Item
Second Law of Motion		Objects remain at rest or a constant velocity unless a force is applied
Third Law of Motion		The force of an object is equal to the product of the mass and acceleration of the object
First Law of Motion		For every action there's an equal and opposite reaction

A force is simply a _______ or a _______ .

Which statement best describes inertia?

the force applied to an object to make it move 

the product of mass and acceleration 

Part 7: Short Answer Questions 

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?

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)

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

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.

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.

A vector describes a quantity's ________ and ________. 

speed and velocity 

magnitude and direction 

force and reference point

position and direction 

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

x and y axis 

position 

velocity 

reference point 

_____ is a change in position over time. 

Vector 

Velocity 

Motion 

Distance

An object with balanced forces acting on it would ________. 

change direction

maintain a constant velocity

have a positive net force acting on it

change speed 

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.)

True

False

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.)

True

False

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)?

18 meters 

13 meters

0 meters

28 meters 

5 meters

16.3 meters 

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)?

Impossible to tell from the diagram

13 meters

5 meters

28 meters 

16.3 meters 

0 meters 

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

C

B

A

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

balanced 

unbalanced 

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.)

True

False

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.)

True

False

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

1

2

3

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

1

2

3

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

1

2

3

2 and 3

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

A

B

C

All the objects are at rest

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

how long the object is traveling for 

how far the object is from the reference point 

how far the object has traveled 

how fast the object is traveling 

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? 

11:00

10:15

9:30

9:45

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? 

90 miles 

40 miles

50 miles

80 miles

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

0 kilometers 

150 kilometers

120 kilometers 

60 kilometers 

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

A car left the home traveling at a constant speed, then accelerated for 30 mins. It then took a 1-hour break and returned home, which took 90 minutes. 

A car left the home traveling at a constant speed for two hours, then took a 1-hour break. The car then traveled again at a constant speed, but faster, for 30 min. Finally, the car returned home at a constant speed.

A car left the home accelerating for two hours and then took a 1-hour break. It then accelerated even more for 30 mins. It then returned home during which it decelerated. 

A car left home traveling at a constant speed for two hours, then took a 1-hour break. The car then traveled again at a constant speed, but slower, for 30 min. Finally, the car returned home at a constant speed. 

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

Speed

Velocity 

Dak Prescot 

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

Multiply the change in time with the change in direction 

Divide the change in time by the change in distance (or displacement)

Divide the change in distance (or displacement) over the change in time 

Divide the change in speed over the change in time 

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

1

2

3

All objects are moving 

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

1

2

3

All objects are moving at a constant velocity

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.)

True

False

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

the object is at rest 

the object is returning to the reference point 

the object is changing directions 

the object is slowing down 

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

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

An object is accelerating at a constant rate. 

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

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

An object is traveling at a constant velocity. 

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

meters per second squared 

meters per second 

miles per hour 

kilometers per hour heading southwest 

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.)

True

False

Acceleration can best be described as a change in ________________. 

speed 

speed and/or direction 

direction 

magnitude and/or velocity 

Which scenario does NOT describe an example of acceleration?

A car maintains a constant speed while driving straight ahead. 

A car maintains a constant speed while turning to the right. 

A car decreases its speed while driving straight ahead. 

A car increases its speed while turning to the left. 

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

Graph (a)

Graph (b)

Neither graph shows an object increasing its speed 

Both graphs show an object increasing its speed

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

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

Rosalind Franklin 

Albert Einstein 

Issac Newton

Deion Sanders 

Match the law to the definition: 

Second Law of Motion 

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

Third Law of Motion 

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

First Law of Motion 

For every action there's an equal and opposite reaction 

Which statement best describes inertia? 

the force applied to an object to make it move 

the product of mass and acceleration 

the resistance of an object to any change to its state of motion 

the force that causes moving objects to slow down 

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

it decreases 

it stays the same 

not enough information provided to answer

it increases 

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

100 m/s2

1 m/s2

0 m/s2

10 m/s2

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?

A to B 

B to C 

C to D 

D to E 

ISD Grade 8 Science Midterm - 2023/2024

ISD Grade 8 Science Midterm - 2023/2024

Part 1: Vectors and Forces

Part 2: Time & Distance Graphs

Part 3: Velocity and Speed

Part 4: Acceleration

Part 4: Laws of Motion

Part 7: Short Answer Questions

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

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.

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.

Part 1: Vectors and Forces

A vector describes a quantity's ________ and ________.

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

_____ is a change in position over time.

An object with balanced forces acting on it would ________.

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.)

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.)

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)?

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)?

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

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

Part 2: Time & Distance Graphs

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.)

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.)

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

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

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

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

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

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?

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?

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

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

Part 3: Velocity and Speed

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

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

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

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

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.)

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

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

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

Part 4: Acceleration

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

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.)

Acceleration can best be described as a change in ________________.

Which scenario does NOT describe an example of acceleration?

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

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

Part 4: Laws of Motion

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

Match the law to the definition:

Which statement best describes inertia?

Part 7: Short Answer Questions

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

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.

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.

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.

A vector describes a quantity's and .

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.