SCIENCE CMM 1

Recognize that density is a characteristic property of matter. How can density be used to identify unknown substances?

Density = mass/volume. Assume that you have to identify an unknown metal. You can determine the mass of the metal on a scale. You can determine the volume by dropping the object into a graduated cylinder containing a known volume of water and measuring the new volume. You divide the mass by the volume and compare the density to a list of known densities.

Use density as a conversion factor between mass and volume; show examples of converting mass to volume and vice-versa.

Mass = 5.0 g Volume = 2.0 mL What is the density? Density = 5.0 g 2.0 mL = 2.5 g/mL

Define mass.

Mass is a measure of how much stuff the object is made of.

Define volume.

Matter is conserved during all kinds of change because we are just rearranging the spheres.

Demonstrate that you can use a multiple beam balance to determine the mass of various objects. Record the value of an object's mass in a manner consistent with the limit of precision of the balance.

NA

Develop, from experimental evidence, the law of conservation of system mass.

NA

Given a graph of mass vs. volume of a substance, write the equation of the line and state the meaning of the slope.

NA

Recognize that instruments have a limit to their precision; relate the data recorded to the quality of the measurement.

NA

Relate the volume of a container (in cm3 ) to the volume of liquid it contains (in mL).

NA

Represent class data using a histogram; use the histogram to interpret trends in the data. Sketch a sample

NA

Round off calculated values to the appropriate number of significant figures.

NA

Use particle diagrams to represent solids, liquids and gases in a way that is consistent with their densities.

NA