Energy & Transformations
Waves & EM Spectrum
Forces
Gravity
True or False
100
The two main types of energy.
What are kinetic and potential energy?
100

Disturbances that carry energy. 

What are waves?
100
A simple push or a pull?
What is a force?
100

As mass of two objects increase, the force of gravity between them ______________.

What is increases?
100
Sound energy is potential energy.
FALSE, sound occurs in vibrations. Vibration is motion, which has KINETIC energy.
200
How does heat flow when placing ice in a drink?
Heat flows from the drink to the ice.
200

When light bounces off a material with the same angle it hit the material.

What is reflection?
200
A contact force that works against motion.
What is friction?
200

Gravity is affected by these two factors.

What are mass and distance?

200
Wavelength increases as frequency decreases.
TRUE
300

Where can you find elastic energy?

A rubberband or a spring
300

The electromagnetic waves in order from longest wavelength (lowest energy) to shortest wavelength (highest energy) are: __________________________________

Radiowaves, microwaves, infrared light, visible light, ultraviolet light, x-rays,  and gamma rays.
300
The sum of all forces working on an object.
What is net force?
300

Gravity ___________ as the distance between two objects increases.

What is decreases?

300
Sound waves travel fastest through liquids.
FALSE, Sound waves need a medium to move. They travel fastest in SOLIDS.
400
Identify the energy transformation that occurs as a ball falls to the ground. 
Gravitational potential energy to kinetic energy.
400

These waves travel with or without a medium.

What are Electromagnetic waves (light)?

400
A force of attraction between two objects that depends on the objects masses and distances apart.
What is gravity?
400
Why does gravity pull a human with more force than a bug?
Because a human has more mass.
400

Forces are unbalanced when all the forces acting on an object cancel each other out. 

FALSE, Forces are BALANCED when all the forces acting on an object cancel each other out. 

500
State the law of conservation of energy.

The law of conservation of energy states that energy can neither be created nor destroyed. It can only be transformed into other forms of energy. 

500

These waves cannot travel in empty space. Because they need the matter to travel, mechanical waves travel fastest through solids and slowest through gases 

What are mechanical or sound waves?
500

When forces are ___________ will occur in the direction, or combination of directions, of the greater force. 

What is unbalanced?
500

How can you increase the force of gravity between two objects with the same mass?

Move them closer together. (Decrease the distance)

500
Weight and mass depend on gravity.
FALSE, ONLY WEIGHT changes with gravity.
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