Physical Science
Do Now
February 24th 2011
Matter: anything that has mass and takes up space
Mass – the amount of matter in something
Volume – the amount of space something occupies
Answer the following four questions:
1) What is an example of solid matter?
2) What is an example of liquid matter?
3) What is an example of gaseous matter?
4) What is an example of something that is NOT matter?
SWBAT calculate basic density problems
HOMEWORK: Section Review
Page 52
Numbers 1  6
Do Now Review!
1) What is an example of solid matter?
1)
2)
3)
4)
Box
Person
Car
Desk
1)
2)
3)
4)
5)
Water
Oil
Juice
Soda
Liquid Nitrogen
1)
2)
3)
4)
Air
Oxygen gas
Nitrogen gas
Methane
1)
Light, is not matter!!, it is simply a reflection of light off of the
gaseous air particles!
2) What is an example of liquid matter?
3) What is an example of gaseous matter?
4) What is an example of something that is NOT matter?
What is a property?
• Property: a
characteristic of a
substance that can be
observed
• What do you observe
about this clip art?
Physical Property
Physical property: a property that can be observed
without changing the identity of the substance.
Examples:
• luster
• melting point
• malleability: the
ability to be hammered
into a thin sheet
• density
• ductility: the ability
to be stretched into a
wire
• boiling point
• solubility
• specific heat
Special Physical Properties
• Melting point: the temperature at which a
substance changes from a solid to a liquid at
a given pressure
water = 0oC
• Boiling point: the temperature at which a
substance changes from a liquid to a gas at a
given pressure
water = 100oC
Chemical Properties
• Chemical property: a property that can only
be observed by changing the identity of the
substance
Examples:
•flammability
•ability to rust
•reactivity with vinegar
Density
• Density is the amount of mass per unit
of volume.
• Density can be used to identify a
substance.
• The density of water is 1.0g/mL
Density Calculations
• Calculations:
– Density = Mass / Volume
– Density = Mass
Volume
• Ex: A cube has a mass of 4.0 g and occupies
a volume of 2.0 ml. What is the DENSITY
• Density = Mass / Volume
• Density = 4.0 g / 2.0 ml
• Density = 2.0 g/ml
More Density Calculations
• Ex: A liquid has a mass of 25.0 g and a
volume of 5.0 mL.
• Density = Mass / Volume
• Density = 25.0 g / 5.0 ml
• Density = 5.0 g/ml
Substance
Density (g/mL)
Mercury
13.6
Water
1.00
Ethanol
0.81
Try these density problems in notebook…
1) 100 grams of a liquid completely fill a 200 mL bottle.
What is the density of the liquid?
2) A scientist puts 50 grams of a substance into a 100mL
flask. What is the density of the liquid?
3) A piece of silver has a mass of 2800 grams and
occupies a volume of 266 mL. What is the density of
silver?
4) A student pipets 5.00 mL of ethanol into a flask
weighing 15.25 grams. Calculate the density of ethyl
alcohol
5) A block of copper weighs 453 g and is placed into a
solution occupying a volume of 525 mL, what is the
density?
Review
1) 100 grams of a liquid completely fill a 200 mL bottle. What is
the density of the liquid?
1) D = mass/volume = 100g / 200mL = 0.50 g/mL
2) A scientist puts 50 grams of a substance into a 100mL flask.
What is the density of the liquid?
1) D = mass/volume = 50g / 100mL = 0.50 g/mL
3) A piece of silver has a mass of 2800 grams and occupies a
volume of 266 mL. What is the density of silver?
1) D = mass/volume = 2800g / 266mL = 10.53 g/mL
4) A student pipets 5.00 mL of ethanol into a flask weighing
15.25 grams. Calculate the density of ethyl alcohol ?
1) D = mass/volume = 15.25g / 5.00mL = 3.05 g/mL
5) A block of copper weighs 453 g and is placed into a solution
occupying a volume of 525 mL, what is the density?
1) D = mass/volume = 453g / 525mL = 0.86 g/mL
Homework
• HOMEWORK: Section Review
• Page 52
• Numbers 1  6
Achieve 3000
• Log on to: www.achieve3000.com
• Read the homepage article “Soccer Star Keeps
Giving”
• Read the mail article under the subject:
Physical Science 2/21 – “Turn it Down”
• HOMEWORK: Section Review
• Page 52
• Numbers 1  6