Science Unit Test 1 Flashcards
5 parts of the Particle Theory
- All matter is made up of very small particles
- There is space between the particles
- All particles in a pure substance are the same
- The particles in matter are always in motion
- Particles are attracted to eachother
What can a heterogeouns also be called
A mixture
what 2 things define a pure substance
- made up of only one particle
- cannot be sepersted physically
What is the particle Theory
Explains how all matter is structered and how it behaves under certains circumstances
What is a particle made up if two or more atoms boned together called
molecule
What is the simpeliest form if matter
atom
What type of mixture can you see the different parts
heterogeneous mixture
what mixture can you not see the different parts in
homogeneous mixture
what are some physical properties
color, odour, texture, lustre, taste, clarity
What is the definition of density
the amount if matter within a certain volume
what are some chemical properties
reactivity, sensitivity to light, combusility
what are some physical changes
melting and boiling, freezing, condensation, evaporation
what are some chemical changes
burning, cooking, rusting
how to know a chemical change has occured
- a new color has appeared
- heat or light is released
- bubbles of gas formed
- solid forms a liquid
- irreversible
pure substance
made up of only one type of particle, cannot be separated
compound
also called molecules, made of different elements attached together
elements
made up of only one type of atom, found on the periodic table
mixture
made up of two or more pure substances can be seperated
what is another word for a homogeneous mixture
a solution
what are two types of mixtures
homogeneous & heterogeneous
what does solubility mean
the ability to dissolve
what is viscosity
the abilty a liquid flows
what is a melting and boiling point
a tempature where a state change occurs
what dies malleabilty mean
the ability to be bend
