MATTER CHANGES
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Created on March 21, 2023
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Transcript
START
MATTER CHANGES
Separating mixtures
How much do we know about matter?
Fermentation
Oxidation
Combustion
Chemical reactions
Evaporation
Filtration
Distilation
Decantation
Magnetic separation
Mixtures
INDEX
MIXTURES
What is a mixture?
+ info
It is a physical combination of two or more substances.
MIXTURES
What is a mixture?
There are two types of mixtures
Types of mixtures
Homogeneous
Heterogeneous
Are the following mixtures heterogeneous or homogeneous?
Types of mixtures
Heterogeneous
Homogeneous
Homogeneous
Heterogeneous
Types of mixtures
We can use various methods to separate the components of mixtures.
SEPARATING MIXTURES
Evaporation
Filtration
Decantation
Magnetic separation
Distilation
Separating mixtures
As a result we can use magnets to separate these metals from non-magnetic substances. (like paper or plastic).
When do we use this?
Some metals (like iron) are magnetic.This means they are attracted to magnets.
Magnetic separation
Liquids of differentdensities
Mixtures of liquidsand solids
We use decantation to separate:
Decantation
Filtration
We can use filtration to remove small particles but lets the liquid or gas pass through.
+ info
Evaporation
When we heat water, it becomes a vapour and leaves substances behind, like salt.
+ info
Distilation
Different liquids have different boiling points.If we heat a mixture of ethanol and water, ethanol boils first and leaves the water behind.
+ info
Then, we can collect the ethanol vapour and cool it down to obtain the liquid.This is called DISTILATION.
Distilation
What method do we use to separate spaguetti and water?
Separate
Purify
Sink
Recover
Separate
Purify
Sink
Recover
A chemical reaction changes the properties of a substance and produces something different.
CHEMICAL REACTIONS
CHEMICAL REACTIONS
They occur around us all the time.They are caused by agents, such as heat or oxygen.
Chemical reactions
Oxydation
Fermentation
Combustion
It is a chemical reaction that produces energy in the form of heat and light.
Combustion (burning)
Natural gas
Petrol
Wood
Combustion occurs when oxygen in the air reacts with a fuel such as wood, petrol or natural gas. When fuels burn, some waste products are produced.- Examples of fuels: Wood, petrol and natural gas.
Combustion (burning)
Combustion (burning)
Oxidation is a type of chemical reaction in which matter (metals like iron) reacts with oxygen in the air and change to a brown substance called rust. Some food can also oxidate (like an apple).
OXIDATION
It is a chemical reaction that is caused by fungi and bacteria.These microscopic organisms break down organic materials and produce new substances.
FERMENTATION
Yeasts (levadura) is a fungus that ferments bread dough (masa de pan). It produces carbon dioxide, which makes the doughrise.
FERMENTATION
Other foods are fermented with the help of bacteria:
FERMENTATION
Cheese, yoghurt, pickles, olives and chorizo are fermentedby bacteria that produce lactic acid (just like we did in class!). This process helps to preserve the food, so it can be stored longer.
FERMENTATION
What energy is produced from combustion?
What gas is necessary for combustion?