1.	Classify the following as element, compound, homogeneous mixture, or heterogeneous mixture.

	_______________________________	a.	helium

	_______________________________	b.	an apple

	_______________________________	c.	an iron nail

	_______________________________	d.	table salt (sodium chloride)

	_______________________________	e.	fog

	_______________________________	f.	brass

	_______________________________	g.	tap water

	_______________________________	h.	carbon dioxide

2.	Following is a list of properties of a gold coin.  Identify each property as intensive, extensive, or chemical.

	_______________________________	a.	it has a mass of 125.2 grams

	_______________________________	b.	acid does not cause it to corrode

	_______________________________	c.	it is shiny

	_______________________________	d.	it has a density of 19.3 g/cm3

	_______________________________	e.	it has a radius of 2.5 cm.

	_______________________________	f.	it is smooth

3.	Classify the following changes in matter as physical or chemical.

	_______________________________	a.	chopping wood

	_______________________________	b.	evaporating gasoline

	_______________________________	c.	bleach fading the color of clothing

	_______________________________	d.	boiling water from a saltwater solution

	_______________________________	e.	metal fizzing in an acid solution

	_______________________________	f.	putting peroxide on a wound