Does it really…….. MATTER????

DOES IT REALLY……..MATTER????

What is matter?

Anything that has mass and takes up space

What isn’t matter?

What is matter made of???

Democritus- empty space and tiny bits of stuff…. called them atoms

What is the Law of Conservation of Mass????

Matter cannot be created or destroyed- it only changes forms

Who wrote that law?

Antoine Lavoisier- a French chemist http://www.youtube.com/watch?v=x9iZq3

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What is an atom?

A particle that makes up most types of matter….an atom is made of smaller parts

How do we know what an atom looks like?

We use models to help us understand

http://www.youtube.com/watch?v=xqNSQ3OQMGI

Who is John Dalton?

He believed atoms were too small to be seen by the human eye

Who is J.J. Thompson?

Discovered the electron Electrons are negative

Who is Rutherford?

Discovered the nucleus of the atom

What is found in the nucleus?

Protons- positive Neutrons- neutral Facts-

P + N- atomic mass # of P= atomic number # of P= # of electrons

What is the difference in a physical change and a chemical change?

Physical change- a substance is not changed chemically

Chemical change- a new substance forms

http://www.youtube.com/watch?v=qqqmFFCwd7k

A Carbon Atom

Is this a chemical change or physical change????

http://www.youtube.com/watch?v=uZlh89iL4jI&feature=related

Physical Properties of matter

Color *Temperature Shape Mass Length Volume Density http://

www.youtube.com/watch?v=QkAPTXr5vMs

Chemical Properties of Matter

Flammability Reacts with oxygen (oxidation) Reacts with light Reacts with water http://www.youtube.com/watch?

v=OgS46ksAawk http://

www.youtube.com/watch?v=uJOGy0dgmUU