Chapter 5 Flashcards
What is matter
Anything with mass and volume
What is the difference between mass and weight
Mass is amount of matter that an object has while weight is the graviton all pull on the object
Weight varies but mass doesn’t
What is volume
Amount of space an object fills
What are pure substance
Matter with only one type of particles
What are pure substances further classified as
Elements and compounds
What is a mixture
Contains 2 or more pure substances
What is an element
Basic building blocks of matter
Is a pure substance that cannot be further simplified
Only one kind of particles
Why is a compound
Pure substance with 2 or more elements
Elements in definite proportion and can’t be separated physically
Only one kind of particle but each particle has 2 or more elements chemically joined
What is a homogenous mixture
Made of substances that are evenly and microscopically mixed together
Particles separate but can’t be distinguished
What are heterogenous mixtures
A mixture that is not uniform
Large visible clumps
What is chemistry
Study of matter
What are alloys
Homogenous mixtures of solids
Why are physical properties of matter
You can observe with your senses , measure or calculate
What are some physical properties
Color Ductility Malleability Density Melting point Boiling point Solubility Conductivity
What is a chemical property
Describes the behavior of a substance as it changes into a new substance
What are some common chemical properties
Flammability
Corrosion
Reactivity
What are the 3 states of matter
Solid
Liquid
Gas
What is the difference between a chemical and a physical change
Physical is reversible while chemical is irreversible
In chemical a new substance is formed with new properties while in physical only the state of matter changes
What are some examples of a physical change
Boiling water
When a cream is whipped
Sugar dissolving in tea
What are some examples of chemical changes
Gas burns to create carbon dioxide, heat and water
Sunlight causes body to make vitamin D
What is the kinetic molecular theory
Idea that matter is made from moving invisible particles
All matter is made of particles
Particles are in constant motion
the more energy particles have , the faster they move
different substances have different particles
The attraction between particles decreases with an increase in motion
Explains the particles in a solid
particles are locked in fixed position .
definite shape and volume
explains the particles in a liquid
particles of matter have more energy than when they were solid
they can now slide past each other
