Forces Of Motion And Waves Question Preview (ID: 42245)
South Carolina Standards 8th Grade
8P2
8P3.
TEACHERS: click here for quick copy question ID numbers.
Which of the following forces can speed up, change directions, or slow down the speed of an object?
a) Friction
b) Air Resitance
c) Gravity
d) All of the answer choices
If a car travels 100 meters in 5 seconds, what is the average speed of the car?
a) 100 m/s
b) 50 m/s
c) 500 m/s
d) 20 m/s
Which of the following BEST explains why a heavier object is harder to move?
a) The more mass an object has the less inertia
b) The more mass an object has the more inertia
c) the less mass an object has the more inertia
d) heavier object require more force because they have less inertia
If a car is traveling forward with a force of 100N and the force of friction is acting in the opposite direction at 20N. What is the net force acting on the car and the direction?
a) 80 Newtons forward
b) 120 Newtons forward
c) 100 Newtons backwards
d) d) 20 Newtons backwards
What would happen if you have two crests of a wave traveling toward one another?
a) Constructive Interference and the waves amplitude would decrease
b) Destructive Interference and the waves amplitude would decrease
c) Constructive Interference and the waves amplitude would increase
d) Destructive Interference and the waves amplitude would increase
What is the function of a convex lens?
a) to filter and transmit light
b) to refract light and magnify objects
c) to separate white light
d) to reflect light so objects will be more visible
Which of the following correctly explains a sound wave.
a) Mechanical Waves that travel as compressional waves parallel to the direction of motion
b) Electromagnetic Waves that travel as compressional waves parallel to the direction of motion
c) Mechanical Waves that travel as transverse waves perpendicular to the direction of motion
d) Electromagnetic Waves that travel as transverse waves perpendicular to the direction of motion
Which of the following best explains an echo?
a) Sound waves are refracted off objects
b) sound waves are transmitted through objects
c) sound waves are absorbed by objects
d) sound waves are reflected off objects
Which of the following electromagnetic waves is best for wireless technology and communication?
a) Gamma waves because it has high energy and shorter wavelengths
b) Radio waves because it has a lower energy and longer wavelengths
c) Visible light because it is visible to the human eye
d) X-rays because they have a high energy and a high frequency
Which of the following explains why we can see and feel energy from the Sun?
a) electromagnetic waves vibrate through a medium
b) electromagnetic waves transfer matter
c) electromagnetic waves can travel through empty space
d) electromagnetic waves cannot travel through solids
How does a prism reveal all the colors that make up white light?
a) the prism acts as a lens to reflect white light
b) the prism adds colors to white light as it transmits through
c) the prism absorbs colors of white light as it passes through
d) the prism refracts different wavelengths of light
Which electromagnetic wave has the lowest frequency but the largest wavelengths?
a) Visible Light
b) Radio Waves
c) Microwaves
d) Gamma Rays
Which of the following best explains why a fresh banana appears yellow?
a) the banana reflects the yellow wavelength and absorbs all the other colors
b) the banana absorbs the yellow wavelength and reflects all the other colors
c) the banana emits yellow light and our eyes absorb all other color wavelengths
d) the banana emits all colors and our eyes absorb the yellow wavelength
What is the difference between a low frequency and a high frequency wave?
a) Wavelength increases in high frequency waves
b) Wavelength decreases in high frequency waves
c) Amplitude increases in high frequency waves
d) Amplitude decreases in high frequency waves
On a time-distance graph when a line is straight and not curved which of the following is true?
a) The object increased in speed
b) The object decreased in speed
c) The object traveled at a constant speed
d) The object was traveled back to the reference point
Which of the following BEST describes how to speed up the motion of an object?
a) Apply a force in the same direction as the object is moving
b) Apply a force in the opposite direction as the object is moving
c) Increase the objects mass
d) Increase the amount of friction
Which of the following best explains why a person continues to move forward during a car crash?
a) Gravity
b) Friction
c) Inertia
d) Action and Reaction
A rocket launch causes a action force of 500N, what would the reaction force of the gases be?
a) Greater than 500N
b) Equal to 500 N
c) Less than 500N
d) There is no way to know
What does a negative slope on a time distance graph represent?
a) An object moving away from its reference point
b) An object that is at rest
c) An object that is going back towards its reference point
d) An object that is changing speed
Which of the following would be the best controlled scientific investigation to determine how the amount of force on an object affects its speed?
a) Push various objects with different masses at least three times and measure its average speed.
b) Push an object of the same mass with different amounts of force at least three times and measure its average speed.
c) Push various objects with different amounts of force and measure there average speed.
d) Push an object with the same force with different amounts of mass and calculate its average speed.
Play Games with the Questions above at ReviewGameZone.com
To play games using the questions from above, visit ReviewGameZone.com and enter game ID number: 42245 in the upper right hand corner or click here.
To play games using the questions from above, visit ReviewGameZone.com and enter game ID number: 42245 in the upper right hand corner or click here.
TEACHERS / EDUCATORS
Log In | Sign Up / Register
Log In | Sign Up / Register