Chemical or Physical property
what are two examples of physical properties
colour, texture, smell, state etc
what is the first point of particle theory
all matter is made up of tiny particles
when does a chemical change occur
what is an example of matter?
anything, everything is made up of matter
True or false
Matter can be either a pure substance or a mixture
true
what is an example of a chemical propertey
flammability, acidity, ability to rust
what is the second point of particle theory
the particles are always moving
when does a physical change occur
when a substance undergoes a change in its physical properties but it is reversible
what is an example of chemistry that we see in our daily life
cooking etc
What is a pure substance
matter that conatains only one kind of particle
Is colour a physical or chemical property
physical
what is the third point of particle theory
there is space between all particles
physcial or chemical change
Your friend decides to toast a piece of bread but leaves it in the toaster too long. The bread is black and the kitchen is full of smoke.
chemical change
what is matter made of?
tiny particles called atoms
What is a mixture?
Matter that contains more than one kind of particle
chemical
what is the fourth point of particle theory
adding heat makes particles move faster
The lake freezes in the winter
physical change
What are the three states of matter
Solid,liquid,gas
What are the two categories pure substances can be divded into
element and compound
is density a physical or chemical property and what is the equation for density
physical d=m/v
what is the fifth point of particle theory
all particles in a pure substance are the same. different substances are made up of different particles
Physical or chemical change
In a fireworks show, the fireworks explode giving off heat and light.
Explain why?
chemical change
What is an example of a change of state
melting, freezing, evaporation, condensation
what are the two categories mixtures can be divided into
homogenous and heterogenous mixtures