Kinetic/Potential Energy
What is energy?
The ability to do work or to cause change.
Besides kinetic and potential energy, name one other example of different forms of energy?
Possible answers:
chemical energy, nuclear energy, magnetic energy, solar energy and electrical energy.
What is chemical energy?
A form of potential energy (energy stored in the chemical bonds between atoms.
What are some examples of chemical energy?
Possible answer may include:batteries, food, gasoline, coal, and oil.
What is temperature?
the measure of the average kinetic energy (movement) of the participles in an object.
What is kinetic energy?
The energy any object has because of its motion.
What is electrical energy?
Energy carried by electricity.
What are some forms of energy that chemical energy can release?
light energy, heat (thermal) energy
example: when a fire burns
A chemical reaction that absorbs heat energy is called ________________?
endocthermic reaction.
Name 2 methods of measuring temperature.
The 3 most common units are....
Celsius (most commonly used in the world)
Fahrenheit (the method mostly used in the United States)
Kelvin (mostly used for scientific calculations)
What is potential energy?
Stored energy or energy that an object has due to its position.
What is chemical energy?
Energy stored (potential energy) in the chemical bonds of a compound.
In every chemical reaction, tranasformation in energy occur. To bread bonds, energy must be _________?
added
What is the most important endothermic reaction?
photosynthesis
(The chemical reaction that converts the energy in sunlight into a type of sugar that plants use for growth).
What is heat?
Heat is a trasnfe of enegy from one obect to another due to a difference in temperature.
As a roller coaster car goes down a hill, its potential energy is changed into this.
What is kinetic energy?
What is radiant energy?
This is a type of energy that travels in waves and can travel through empty space.
examples: the sun, e-rays, waves from microwaves
When bonds form, energy is ______________?
released
What are chemical reactions that release heat energy?
exothermic reactions
Heat always flows from a ________ temperature to a ____________ temperature.
Heat always flows from a higher temperature to a lower temperature.
A skier is on a ski lift going to the top of the mountain. The higher the skier is being lifted, what is increasing?
potential energy
What is thermal energy?
Heat (energy of the movement of atoms and molecules.)
What are some examples of endotheric reactions?
Possible answers may include:
photosynthesis, cookies baking and puff up, portable cold packs that are kneaded and the pack turns cold.
What are some examples of exothermic reactions?
Possible examples may include:
hand warmer, when a material burns, fireworks