Energy Speed and Motion
Define Potential and Kinetic Energy
Potential energy is stored energy and kinetic energy is the energy a moving object has.
What is a collision?
What is heat?
Heat is the transfer of thermal energy
What is an electrical charge and an electrical current?
an electrical charge causes matter to have force (electrical force) when placed near other charged matter. and electrical current is the flow of electrical charges.
Name 5 forms of energy:
Light, Thermal (heat), mechanical, sound, electric, chemical
The ability to do work and cause change is
Energy
What are two sports that involve energy transfers?
Answers will vary
What is radiation?
Energy that travels in waves.
Define conductor.
A conductor is a material that allows electricity to flow through it.
All energy needs a ___________ or starting point.
Source
What causes an object that is not moving to gain kinetic energy?
A 'force' causes an object to start moving
Why would a collision when two cars are traveling at faster speeds do more damage?
Cars traveling at faster speeds have more kinetic energy and a larger amount of energy is transferred causing more damage.
Molecules that are heated move _____________ while objects that are _________ move __________.
Bonus, Explain why.
Faster
Colder (or any form of this)
Slower
This is because when heat is transferred to particles they move faster.
Define insulator and resistor, and then give an example of a conductor, insulator and resistor.
Insulator does not allow current to flow through
and a resistor controls the flow of electrical current
answers may vary
Energies are different for example potential energy has to do with energy in objects when they are bent stretched and compressed. What happens to thermal energy and electrical energy, what are their causes.
electrical energy is charged particles flowing through a path, and thermal energy is the energy an object has because of the movement of its particles.
How do you know that a falling domino that causes another domino to move has energy?
Energy is the ability to do work and the falling domino caused a change in the domino it hit
In Newtons cradle why do the spheres in the center barely move?
most of the kinetic energy is transferred through them
What happens to particles of matter as they are heated? Apply this to humans and the sun, and plants and the sun.
When the temperature gets hotter the particles move faster.
Answers will vary
What causes a light bulb to glow in an electrical circuit?
Electrical energy is changed into light energy. (answers may vary)
Describe 4 ways that energy was transferred when you constructed your cars and then crash-tested them.
What can you improve to make the car more safe?
Answers may Vary
When the roller coaster is pulled up it is building potential energy, once it gets to the top and starts rolling back kinetic energy is released......etc
Suppose you were bowling without a bowling ball and had only a softball and a large plastic ball to hit the pins. How would the speed and motion of these objects be different from when you use the heavy bowling bowl?
The softball and plastic balls might need more energy to roll them farther down the lane and knock down pins.
A hot pot is placed on a cool table. Which way will heat flow between the pot and the table, and why?
Heat will flow from the pot to the table because heat always flows from a warmer object to a cooler one.
Describe how electric current flows in a circuit.
Answers may Vary:
The battery provides energy that causes an electric current to flow. The wire provides a path for the current, and this is then transformed into another form of energy.
Name four professions that need to know about energy transfers, and define which energies they use in their profession.
Answers may Vary