Data Analysis and Argumentation
What does CER standard for?
Claim, Evidence, Reasoning
What is the law of conservation of Mass?
Mass can never be created or destroyed in a closed system
What is mass?
The amount of matter in a substance
What is the generic equation for the line? What is the formula for finding slope?
y=mx+b
y2-y1/x2-x1
NO! Open systems allow matter to be exchanged with surroundings, but still are never created or destroyed.
What is density?
The amount of mass per unit volume. The amount of mass in a given amount of space.
List all things that should be included in a proper graph.
Independent on X, depending on Y
Labels and units on axis
Appropriate scale on axis
Title
Trendline that starts at 0,0
Are the following chemical or physical changes:
burning wood
a car rusting
breaking glass
burning wood = chemical
car rusting = chemical
breaking glass = physical
Draw a particle diagram to show the following:
Object A is twice as large as object B
Object A and B have the same mass
draw on board
Complete the following in correct sig figs: 45.0g x 100g =
5000 g2
A student adds salt to water. He finds the mass of the salt to be 2.0g, the mass of the water to be 10.0g, and the mass of the mixture to be 11.9g. Draw a particle diagram of this lab experiment.
draw on board
Are the following intensive or extensive physical properties:
Density
Boiling Point
Length
Volume
Density =intensive
boiling point= intensive
length= extensive
volume= extensive
Complete the following in correct sig figs: 79.0mL x 0.00020 mL =
0.016 mL2
A student adds salt to water. He finds the mass of the salt to be 2.0g, the mass of the water to be 10.0g, and the mass of the mixture to be 11.9g. Does this experiment validate the law of conservation? Explain your answer.
YES! Open system, so may have lost some salt in the transfer process. Matter was not created or destroyed, and the law is validated.
Complete the following: The density of an object is found to be 45.7g/mL, and the mass is 250g. What is the volume? (must be in correct sig figs for full points)
5.5mL