What is Energy?
The ability to do work or cause change is called
What is energy
energy that is stored is called
What is potential energy
The form of energy associated with the motion or position, of an object is
What is kinetic energy
Sunlight, wind, geothermal, hydroelectric are all examples of what type of resources?
Renewable
On a summer day, asphalt is hot on your bare feet because the asphalt has __________ heat from the sun.
absorbed
When you do work on an object some of your energy is _______________ to that object
What is transferred
this type of energy of an object is equal to the work done to lift it to that height. This is called
What is gravitational potential energy
What can keep ice from melting?
Insulator
Nucleus fusion reactions occur constantly in the
What is the sun
The efficiency of an average car is about 30%, what does this mean?
The car uses 30% of the energy stored in the gasoline for motion.
What are the two major categories that are used to classify energy?
Kinetic and Potential
energy that is associated with objects that can be compressed or stretched is called
What is elastic potential energy
Energy that is formed when particles of a solid, liquid or a gas vibrate.
What is sound energy?
Thermal energy is also known as what type of energy?
What is heat energy
What type of energy is in the foods you eat, in the matches you use to light a candle and in the cells of your body
What is chemical energy
Name two factors that will give an object the greatest gravitational potential energy?
The objects height and mass
Which units are used for measuring energy?
Joules
You can find an object's mechanical energy by knowing it's __________ & ____________ energy
What is kinetic and gravitational potential energy
An apple possesses what type of energy?
Chemical energy
Name at least 3 types of energy transformations that take place when a toaster is plugged in?
Electrical, thermal, gravitational, kinetic, light and sound
most accurately describe the Law of Conservation of Energy?
Energy cannot be created or destroyed but it can change from one type to another.
If you have 200 mL of hot coffee that is 100 degrees C and add 50 ml of water that is 10 degrees C to cool it down, what is the approximate temperature of the coffee after the water is added?
82 degrees C
(Vh * Th) + (Vc * Tc)/Vh + Vc
There is an increase in thermal energy in the atmosphere, what type of weather can this create?
More hurricanes
The amount of thermal energy that can be stored in an object depends on what three things?
The objects mass, the materials it's made from and the amount of energy supplied.
How do you calculate light energy efficiency?
(light energy emitted/ electrical energy supplied) * 100%