Chapter 3- Change in States Flashcards
(22 cards)
What is latent heat?
Latent heat is the energy used to break bonds between water molecules when water changes states. Or when the temperature rises.
What is an atom?
The smallest piece of matter.
What is the nucleus?
The center of the atom.
What is a proton?
Positively charged subatomic particle
What is a neutron?
Particle located in the nucleus with the proton.
What is an element?
A pure substance that cannot be broken down into smaller particles.
What is a compound?
Atoms joined in a fixed ratio
What is a mixture?
Something that is together but not chemically combined.
What is homogeneous mixture?
When you cannot see every part of the mixture. Milk or chocolate pudding are examples of this type of mixture.
What is heterogeneous?
When you can see every part of the mixture.
How many different atoms can make an atom?
Only one type.
What is a physical change?
Type of change that does not result in the formation of a new substance.
What is chemical change?
Change that makes a new compound or substance.
What is an exothermic change?
Type of chemical change that will release heat energy.
What is matter?
Anything that takes up space and has mass.
What is a crystalline solid?
Particles that form a regular, repeating pattern..
What is an amorphous solid?
Solids that are softer than others like butter or plastics
What is surface tension?
The inward pull of molecules making up a liquid.
What is viscosity?
The thickness of a liquid.
What is melting?
When the molecules of a substance speed up and hit each other causing its form to change.
What is evaporation, boiling or vaporization?
Breaking all molecular bonds between water molecules
Why is it dangerous for an athlete to stop sweating?
Because the body is no longer cooled by the evaporation of sweat from the skin.
