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Review for Term End Exam 1
These are the concepts you need to master for level 1-2 questions.
23
Science
7th Grade
11/16/2014

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Cards

Term

Define the term applied force.

Definition

It is a force that is applied to an object by a person or another object.

Term

Define the term force. 

Definition

Force is a push or a pull that can cause an object to move, speed up, slow down, or change its direction.

 
Term

angle of incidence 

Definition
It is the angle between the normal line and the incident ray.
Term

angle of reflection

Definition
It is the angle between the normal line and the reflected ray.
Term

angle of refraction

Definition
It is the angle between the normal line and the refracted ray.
Term

incident ray

Definition

It is the light ray that approaches the mirror.

Term

normal line

Definition
It is the line perpendicular to the surface.
Term

reflected ray

Definition
It is the light ray that leaves the mirror.
Term

refracted ray

Definition
It is the light ray that bends (changes direction and speed) as it passes through the boundary of two media.
Term

Define the term medium. 

Definition

It is a substance through which a wave moves.
Term
Define friction.
Definition

It is the force exerted by a surface as an object moves across it or makes an effort to move across it.

Term
Define tension force.
Definition

It is the force that is supplied through a string, rope, cable or wire when it is pulled tight by forces acting from opposite ends.

Term
Define the term spring force.
Definition

It is the force exerted by a compressed or stretched spring upon any object that is attached to it.

Term
State Hooke’s law.
Definition
Hooke’s Law states that the amount that the spring extends is proportional to the amount of force exerted on it.
Term
Define mass.
Definition

It refers to the amount of matter that is contained by the object.

Term
Define the term mechanical wave.
Definition

 It is a wave that transfers energy through a medium (matter /substance).
Term
Define weight.
Definition

It is the force of gravity acting upon that object.
Term

Define air resistance.

Definition

It is a special type of frictional force that acts upon objects as they travel through the air.

Term
Hertz
Definition

It is the unit of frequency (number of waves per second).

Term
Meters
Definition

It is unit of wavelength (distance between crest to crest or the distance between trough to trough) and amplitude is the distance between a line through the middle of a wave and a crest or trough).

 

 

Term
Meters per second (m/s)
Definition
It is the unit for speed.
Term
State the law of reflection.
Definition

The angle of REFLECTION equals the angle of INCIDENCE[image]


Term
Virtual image
Definition

Virtual images are images that are formed in locations where light does not actually reach.
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