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Science Final!
ahhhhh!!!!!
52
Science
8th Grade
05/16/2012

Additional Science Flashcards

 


 

Cards

Term
__________ waves cannot travel through a vacuum.
Definition
Mechanical
Term
________ is transferred during movement of a wave.
Definition
Energy
Term
_________ waves can travel through empty space.
Definition
Electromagnetic
Term
What are some examples of electromagnetic waves?
Definition
Light waves, radio waves, microwaves (yum), infared waves, and ultraviolet waves
Term
Can electromagnetic waves travel through empty space?
Definition
YES. Hahaha!! If you didn't get this one that's bad because I just told you like two questions ago that they did. :)
Term
___________ is a wave in which the disturbance is perpendicular to the direction the wave travels.
Definition
A transverse wave
Term
_________ makes the particles in a medium move parallel to the direction the wave travels
Definition
A longitudinal wave 
Term
The regions of a longitudinal wave where the particles in the medium are closest together
Definition
Compression
Term
The _________ is the highest point in a transverse wave.
Definition
Crest
Term
The regions of a longitudinal wave where the particles are farthest apart
Definition
Rarefaction
Term
The lowest point in a transverse wave
Definition
troughs
Term
From which point do you measure amplitude on a transverse wave?
Definition
From rest position to crest or trough
Term
From which point do ou measure amplitude on a longitudinal wave? 
Definition
Distance between particles in the compressions and rarefactions
Term
Why are atoms electrically neutral? 
Definition
Atoms are electrically neutral because then have equal amounts of positive charge and negative charge.
Term
Name some good conductors.
Definition
Most metals. Copper & aluminum, copper wire extension cord, etc. 
Term
Define conductor.
Definition
Conductor- a material in which electrons can move easily
Term
How does an electric field get stronger?
Definition

The electric force decreases as the distance increases. 

Soooo.... I guess the electric force increases as the distance decreases?

Term
What results when an object has more negative charge than positive charge?
Definition
When an object has more negative charge than positive charge it creates an unbalanced charge and it requires an electrical discharge (the process of an unbalanced electric charge becoming balanced)
Term
_________ is a measurement of how difficult it is for an electric current to flow in a material.
Definition
Resistance
Term
_______ is a material in which electrons cannot move easily.
Definition
An insulator
Term
Define static charge.
Definition
An unbalanced electric charge on an object.
Term
________ is the movement of electrically charged particles.
Definition
Electric current
Term
What is the formula for momentum? 
Definition

Momentum= mass x velocity

or

p=m x v

Term
What is the formula for force?
Definition
force= mass x acceleration
Term
________ is the rate of change of position in which the same distance is traveled each second.
Definition
Constant speed
Term
What is average speed?
Definition
The total distance traveled divided by the time taken to travel that distance
Term
_______ is a measure of change in velocity during a period of time.
Definition
Acceleration
Term
What is the formula for acceleration?
Definition

A= Vf - Vi over t 

 

(in m/s2)

Term
Define velocity.
Definition
Speed and direction of a moving object
Term
___________ is a measure of the change in velocity during a period of time.
Definition
Acceleration
Term
Does velocity change when moving in a straight line?
Definition
It can. Velocity is affected by speed and/or direction, so if the speed changes the velocity will change, even if moving in a straight line.
Term
What is the formula for average speed?
Definition
Average speed= distance over time
Term

________ is the difference between the initial position and the final position of and object.

(Sorry, you're going to get a lot of fill in the blanks on these flashcards... Love y'all!)

Definition
Displacement :)
Term
Define motion. 
Definition
The process of changing position.
Term

_______ is the starting point you choose to describe the location, or position, of an object.

 

A. Reference Direction

B. Constant Point

C. Reference Point

D. Displacement

Definition

C. Reference Point

 

(haha I feel like a teacher :D) 

Term
What is the speed of an object at rest?
Definition

0

 

(TRICK QUESTION!)

Term

Instantaneous speed- speed at a specific instant in time

 

True or False?

Definition
True
Term
What does the graph of an object moving at a constant speed look like?
Definition
A horizontal line
Term
__________ is a measure of change in velocity during a period of time.
Definition
Acceleration
Term
Position is an object's ______ and ______ from a reference point. 
Definition
distance and direction
Term
Define speed.
Definition
A measure of the distance an object travels per unit of time. 
Term

Meters per second is the SI unit for...

 

A. Motion

B. Work 

C. Acceleration

D. Speed

Definition
D. Speed
Term

_________ is an object’s speed at a specific instant in time

Definition
Instantaneous speed
Term
Define motion.
Definition
The process of changing position.
Term
What is considered the universal solvent?
Definition
Water
Term

The difference between the initial, or starting, position and the final position of an object that has moved

Definition
Displacement
Term

________ is the rate of change of position in which the same distance is traveled each second. It is also shown as a horizontal line.

Definition
Constant Speed
Term
Who is sad to leave school this week?
Definition
Chloe :(
Term
Who loves you and will miss you next year?
Definition
Chloe :)
Term
Who hopes we all get 105% on our exams?
Definition
Chloe :D
Term
Who stands on chairs to feel powerful?
Definition
Emily :)
Term
Who hates trick questions?
Definition
Caroline :)
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