MATTER Anything that occupies space and has mass. MIXTURES Is a combination of two or more substances that are not chemically combined. PURE SUBSTANCES Is a substance that are made of only one type of atom or only one type of molecule. LET’S HAVE A RECAP… https://www.youtube.com/watch?v=jCVQwr_TWpY
It is made up of two or more substances that are not chemically combined with each other. The components of a mixture retains its own identity and properties. The separation of components can be easily done. Mixtures are classified based on how uniform they are and on the particle size of components relative to each other.
HOMOGENOUS MIXTURE e v e n ly A mixture in which the components are distributed throughout and has a uniform appearance. + =
A mixtu r e i n wh i ch the c ompone n ts a r e n o t e v e n ly d i s tribu t ed throughout. H e t e r o g e n eous mixtu r es posse s s d i f f e r e n t p r opert i es and compositions in various parts. The properties are not uniform throughout the mixture. HETEROGENOUS MIXTURE + =
HOMOGENEOUS MIXTURE HETEROGENEOUS MIXTURE 1. Have a uniform composition throughout the mixture. 1. Have a mixed composition which may vary from point to point. 2. Components are not visible to the naked eye. 2. Components can be seen easily. 3. The whole mixture is in the same phase. 3. Substances can be of two phases and layers may separate. 4. Particles size is often at atomic or molecular level. 4. Have large particle sizes. 5. Components cannot be separated easily. 5. Components can be separated easily.
HO M OGEN E OUS MIXTURE Can you guess which one is homogenous or heterogenous? HETE R OGEN E OUS MIXTURE HETE R OGEN E OUS MIXTURE
HO M OGEN E OUS MIXTURE HETE R OGEN E OUS MIXTURE HO M OGEN E OUS MIXTURE
LET’S WRAP IT UP… I. IDENTIFICATION. Identify the following substances and mixtures as either homogeneous or heterogeneous. HOMOGENEOUS MIXTURE HETEROGENEOUS MIXTURE 1. Milk and Cereals 2. Soft drinks 3. Smoke 4. Cup Noodles 5. Fruit salad