Physical and Chemical Properties of Matter
What is a physical property of matter?
Can be observed or measured without changing the composition of matter
Is this a physical or chemical change and why?
Separating sand from gravel
Physical change because the original substances stay the same
What is a qualitative observation?
Describes something using words and qualities you can't easily measure (5 senses).
What is a mixture?
A combination of two or more substances that keep their identities (no chemical change).
What does the word "luster" mean?
How shiny something is
What is a chemical property of matter?
Has potential to undergo some chemical change or reaction
Is this a physical or chemical change and why?
Fireworks exploding
A chemical change because a chemical reaction occurs.
What is a quantitative observation?
Using numbers to describe something
What is a solution?
A mixture that has the same composition throughout. One ingredient dissolves in another and the particles are evenly mixed. You cannot see the individual particles.
How do you find the volume of a rectangular prism and what is the unit we use?
length x width x height, cm cubed (cm^3)
What is a physical change?
Takes place without any changes in molecular composition
Is this a physical or chemical change and why?
A brick wall eroding from acid rain.
A chemical change because a chemical reaction occurs.
Is it a qualitative or quantitative observation and why?
There were four dogs in the group.
Quantitative; 4 dogs
Is this a mixture or a solution and why?
Lemonade
Solution; particles are evenly distributed throughout
Name all the fourth and fifth grade teachers at Rice Lake (hint: there are 9).
(4th grade) Mrs. Berquist, Mrs. Caldeen, Mr. Hellmann, Mrs. Arnold
(5th grade) Mrs. Cashman, Mrs. Gerst, Mr. Hanlon, Mr. Stamman, Ms. Winkler
What is a chemical change?
Results in one or more substances of entirely different composition
Is this a physical or chemical change and why?
Melting butter
A physical change because the original substance stays the same (just changes state of matter).
Is it a qualitative or quantitative observation and why?
The rock sample was reddish brown.
Qualitative; reddish brown
Is this a mixture or a solution and why?
Fruit Salad
Mixture; you can see the individual parts and there is no dissolving
What are Ms. Winkler's three favorite animals?
Frog, cow, and alpaca
Provide 2 examples of a physical change and 2 examples of a chemical change.
Physical: color, luster, mass, 5 senses, etc.
Chemical: Burning wood, digesting food, rust, etc.
Is this a physical or chemical change and why?
Frying an egg
A chemical change because the egg undergoes a chemical reaction due to the eat to change the composition.
Is it a qualitative or quantitative observation and why?
The 1st group of people was taller than the 2nd.
Qualitative; taller
Is this a mixture or a solution and why?
Sand and Water
Mixture; the sand does not dissolve in the water and you can still see the individual parts
What does the word "sublime" mean?
The process of a substance changing from a solid to a gas without becoming a liquid first