Definitions
Define Matter
Everything around us that takes up space.
The __________________ mixtures don't have a uniform composition. You can see the separate substances.
Heterogeneous
Say an example of heterogeneous mixture
oil and water, granite, (any mixture in which you can see the different elements)
Which are the three states of matter?
Solid, Liquid and Gas
The change of matter of liquid to solid receives the name of solidification.
Define Mass
Mass is the amount of matter in an object.
When a solid becomes a liquid it receives the name of _________________
Melting
Say an example of physical change.
When we heat or cool a substance like ice-water-vapour.
What general properties does the matter have?
Mass and Volume
Liquids have a fixed volume and a fixed shape.
Solids have a fixed volume and a fixed shape.
Define Volume
Volume is the amount of space that an object occupies.
When ice melts on water it is a _______________ change.
physical
Set an example of alloy
Steel or Bronze
What state of matter has a fixed volume, but take the shape of the container they are in?
Liquid
Objects float when their density is higher than the density of the water.
Objects sink when their density is higher than the density of the water.
Object float when their density is lower than the density of the water.
Define Density
A soft drink is an example of __________________________
homogeneous mixture.
Say an example of chemical change
Oxidation, Combustion
We have two balls with a volume of 1000cm3. Ball 1 has a mass of 0.5kg and Ball 2 has a mass of 2kg. Which ball has higher density?
Ball 2 has higher density.
Granite is an example of homogeneous mixture.
Granite is an example of heterogeneous mixture.
Define Alloy
An Alloy is an homogeneous mixture, usually of two different metals.
Matter has ________________ properties that are common to all matter such as mass and volume.
Say an example of man-made material
Composite, Optical fibre, plastics, (any material made by human)
What happens when a substance combines with oxygen?
Oxidation
Oxidation is the chemical change that takes place when something burns.
Combustion is the chemical change that takes place when something burns.