Vocab
is the ability to cause change.
energy
A cold block of metal is placed in contact with a warm block of metal. Which type of energy will be transferred between the blocks?
thermal
What happens to mass and speed as kinetic energy increases?
they both increase
When a candle is burned, some chemical energy is transformed into _________.
nuclear / heat energy
heat energy
is the energy of an object that is due to motion.
kinetic
What does a slingshot represent?
Elastic potential energy
Give an example of three different types of energies in the classroom and what they are.
Kinetic energy (energy of motion) may be seen in students walking around the classroom.
Potential energy (stored energy) may be seen in books on high shelves.
Electric- outlets-wires
Sounds- people talking
Thermal - heater keeing us warm
The total energy in a closed system _________as energy changes forms.
remains the same / changes
remains the same
is the energy that an object has due to its position, condition, or chemical composition.
potential energy
What is the law of conservation of energy?
Energy cannot be created or destroyed but it can be transformed.
What three types of energy are found in a flashlight?
In a flashlight, chemical energy is transformed into electrical energy.The electrical energy is then transformed into light and thermal energy.
is the sum of an object’s kinetic energy and potential energy. It is the energy of position and motion.
mechanical energy
Which form of energy does x-rays represent?
electromagnetic energy
Name at least three types of energy associated with the microwave.
electromagnetic energy-heat the food
Electric-wires
mechanical- turn the turntable
sound energy- through the keypad tones
thermal energy- food becoming warm
takes place when energy changes from one form into another form
energy transformation
Which of these is an example of the conversion of kinetic energy into gravitational potential energy?
a bicyclist coasting down a long hill
a car engine moving the car forward
a roller coaster car moving toward the top in the tracks
a thrown ball falling toward the ground after passing the top part of its motion
a roller coaster car moving toward the top of a rise in the tracks
What is the difference between electrical energy and electromagnetic energy?
Electrical-energy results from the position or motion of charge particles
Electromagnetic- waves caused by the vibration of electrically charged particles