Vocab
The amount of space an object takes up.
Volume
The ability for a type of matter to burn easily.
Flammability
What direction does heat travel
From the hotter object to the cooler object
What is the equation to find density.
M/v
Matter with a composition that is always the same.
Substance
The amount of particles an object has
Mass
A characteristic of matter that can be observed or measured without changing the identity of matter
Physical Property
What is the difference between the three states of matter
Solid: definite shape and volume.
Liquid: definite volume but not shape
Gas: Neither definite volume or shape.
What is the difference between qualitative and quantitative properties.
Qualitative: describes a quality you can see: color
Quantitative: describes a property that you measure: Density
What is the conservation of mass
That the mass before the chemical reaction equals the mass after the chemical reaction.
Energy due to motion
Kinetic Energy
The characteristic of matter that can be observed as it changes to a different type of matter.
Chemical Property
What are the properties of metals vs nonmetals
nonmetals: shatter, do not conduct electricity, dull
Metals: flatten, conduct electricity, shiny.
What is the difference between exothermic and endothermic reactions.
Exothermic has energy being released to the environment.
Endothermic has energy being absorbed into the substance.
What is the ratio and ratio compound model for the following element percentage of atoms:
80% Hydrogen 20% Carbon
4:1
4 hydrogen and 1 carbon
The starting substance of a chemical reaction.
Reactants
The ending substance in a chemical reaction
Products
What are the 4 changes of states and explain each
Freezing: liquid to solid
Melting: Solid to liquid
Condensation: Gas to liquid
Vaporization: Liquid to Gas
What happens to the mass and the atoms before and after a chemical reaction
The mass is equal before and after. The atoms are the same but have rearranged themselves.
What is the difference between elements and compunds
compunds are 2 or more different types of atoms bonded together.
Elements are1 type of atom.
The increase in a materials volume when the temperature is increased.
Thermal expansion
The decrease in a materials volume when the temperature is decreased.
Thermal Contraction
How does pressure relate to temperature, volume and number of particles.
When pressure goes up temperature goes up
When Volume goes up pressure goes down
When particles goes uo pressure goes up
What is the difference between mass and weight
weight can change because of location
Mass is always the same.
What determines a substances thermal energy
The size of the substance
The motion of the Particles
The distance between the particles
The temperature of the substance