Name That Energy
What type of potential energy is contained in a stretched rubber band?
Elastic energy
Sound travels the fastest through which state of matter?
Solids
Lightning is caused by the build up of (positive/negative) charges in the atmosphere.
negative
What two forces act on a ball as it flies through the air?
The Law of Balanced forces is which law?
Newton's Third
Explain why a fast moving hammer can drive a nail farther into a piece of wood than a slow moving hammer can.
It has more kinetic energy
The range of high and low sound differences between a flute and a tuba are caused by which property of sound?
Pitch
The push and pull between objects due to their +/- charges is called ________________
Electrical force
The magnitude of force is measured in what units?
Newtons
A pebble has more or less inertia than a boulder.
Less
Mechanical energy is the combination of what other 2 types of energy?
Kinetic and potential
Materials that resist the flow of electricity are called _____________________
Insulators
Complete the statement: Matter cycles and energy ______.
Flows
Name a type of contact force that works against movement
Friction
Which law explains why a bowling ball will move slower than a soccer ball when you kick it?
Newton's second
At what point on a rollercoaster track will you find gravitational potential energy?
At the top of the hills
Why does a string of Christmas lights stay lit after one of the bulbs burns out?
It is a parallel circuit
Name the 3 particles in an atom
Protons, neutrons, electrons
Any change in speed or direction of an object is called _________________
Acceleration
If two forces are applied to an object but the object does not move, what kind of force occurs?
Balanced
Fireworks contain chemical energy. What 3 types of energy are released when the fireworks explode?
Heat, light, and sound
What property of light causes a pencil to look bent through a glass of water?
Refraction
An object with a negative charge will attract or repel another negatively charged object?
Repel
True or false: An object moving in a straight line at a constant speed is accelerating.
False
What type of force explains why it is easier for two people to push a heavy object than it is for one?
Combined forces