Prove It! – What do you know and understand?
SC.8.P.8.4 & SC.8.P.8.3
Start at 1 and solve as many of the problems as you can to prove your ability level. Then circle the number that best matches what you can do.
1. Write a basic procedure explaining how you would identify an unknown substance using at
4
All of 3 +
least 2 physical properties.
Design an experiment to determine the identity of an unknown
substance using its physical properties.
3
All of 2 +
Classify and compare substances based on their physical
properties (density, conductivity, etc.)
Calculate and describe the densities of various materials
through the measurement of their masses and volumes.
2
1
All of 1 +
Describe some of the physical properties.
Identify some of the physical properties of matter.
1.
Sarah is completing a lab in which she is required to identify an unknown substance. She
records several observations and measurements of the substance. Which of the following
properties will be most helpful to Sarah in making a correct identification?
a.
density
b. volume
c.
mass
d. weight
2.
Kari likes to play marbles, and she wants to find out if the density of a marble has any effect
on how far the marble rolls. To begin, she selects ten different marbles of various sizes from
her collection. She measures the first marble on a balance and finds that its mass is 13.8
grams (g). Then she takes a 100-milliliter (mL) graduated cylinder and fills it to the 50-mL
mark. After she places the marble in the graduated cylinder, the water level reads 56 mL.
What is the density of this marble, in grams per milliliter (g/mL)?
a.
0.25 g/mL
b. 2.3 g/mL
c.
0 .43 g/mL
d. 4 .1 g/mL
1.
Daryl is conducting experiments on samples of pure copper (Cu). While collecting data, he
records both physical and chemical properties of the metal. Which of the following is
dependent on the amount of Cu in the sample?
a.
Electrical conductivity
b. Mass
c.
Density
d. Melting point
2.
Katie’s teacher has given her a sample that contains a mixture of salt, sand, and iron filings.
She is instructed to separate the mixture into the three individual components. What would
be the best physical property to focus on for the first step in separating the mixture?
a.
Density
b. Magnetism
c.
Electrical conductivity
d. melting point
1.
List some of the physical properties of matter.