Introducton To Energy Flashcards
In science, what is energy?
The ability to cause change
What are the 2 general types of energy?
Kinetic and Potential Energy
What is kinetic energy?
The energy of an object due to motion
What does the amount of KE an object has depend on?
Mass and Speed
KE increases as ________ increases
Mass
KE increases as _________ increases
Speed
If a bowling ball and soccer ball roll on the floor at the same speed which has more KE and why?
Bowling ball; bcuz it has more mass
If a bowling ball and soccer ball roll on the floor and have the same mass with different speeds, which has more KE and why?
The one with more speed
What’s potential energy?
The energy and object has due to its position, condition, or chemical composition
What is GPE?
PE that is the result of an object’s position
Can change in condition affect PE?
YES OFC DA
Chemical PE depends on?
Chemical composition
As bonds break and new bonds between atoms form during a chemical change, energy can be _________
Released
Can an object have PE and KE at the same time?
Yass ofc
What are some common forms of energy?
Mechanical, sound, electromagnetic, electrical, chemical, thermal, and nuclear
Energy is expressed in
JOULES
What is mechanical energy the sum of?
The sum of an objects KE and PE.
Mechanical energy is the energy of?
Motion and Position
An objects mechanical energy can be all ___, all _____, or a combination of both
KE;PE
What is Sound energy?
Sound energy is kinetic energy caused by the vibration of particles in a medium such as steel, water, or air.
As the particles vibrate, they transfer the sound energy to other ___________.
Particles
Why do we hear sound?
Bcuz of special structures in our ears detect the vibrations of the particles in the air.
How is electromagnetic energy transmitted?
Thru space in the form of electromagnetic waves
What causes electromagnetic waves?
By the vibrations of electrically charged particles
Give me examples of electromagnetic waves
Visible light, x-rays, and microwaves
What does electrical energy result from?
The position or motion of the charged particles.
The electricity that powers the lights overhead, is associated with?
Negatively charged particles moving in a wire. (The wire also has positively charged particles that don’t move)
Chemical energy is a form of ________ energy
PE
The amount of chemical energy in a molecule depends on ………………………………………
The kinds of atoms and their arrangements
What are some sources of chemical energy?
Foods we eat, batteries, matches
What is TE?
The KE of the particles in an object
Particles move _____ at a higher temperature than at lower temperatures
Faster
The _______ the molecules in an object move, the more ________________________ the object has.
Faster; TE
The more particles an object has the more ____________________ it has.
TE
What is the source of nuclear energy?
The nucleus of an atom
When does energy transformation take place?
When energy changes from one from to another
Can all energy only change into one type of energy?
No; Any form of energy can change into any other form of energy
What is a closed system?
A group of objects that transfers energy only to one another
What does the law of conservation of energy state?
Energy cannot be created or destroyed only change forms
