Intro to energy 7-8
What is potential energy?
Energy that's being stored
What is heat?
Energy that transfers from one object to another because of temperature difference between the objects
Cold pack is what kind of reaction
Endothermic
What is kinetic energy?
Energy that is in motion
What is heat flow?
The rate at which heat moves from one object to another
Humans use how many joules per second
20 trillion joules per second
What are other forms of energy
Electromagnetic radiation, microwaves, x-rays and visible light
The rate of energy flow is called what?
Power
Define activation energy
Is the minimum energy colliding particles must have in order to react
1 Calorie = how many calories?
1000 calories
One watt is eqivanlant to how many joules?
1 joule
Define Endothermic reaction
Heat is absorbed from the surrounding because the reaction products are at a high energy level than the reactants
What is chemical potential energy?
The energy stored in the nuclei of atoms is nuclear energy
Define temperature
The measure of the average kinetic energy of the vibrating particles of a material
Define exothermic reaction
heat is released to the surroundings because the reaction products are at a lower energy level than the reactants