A Penny For Your Thoughts
Definition is: A characteristic of a substance
property
Name two things that are matter
Instructor approval
What is the unit of mass we use in chemistry?
grams or g
Note, it is not the standard unit of mass: in physics we use kilograms (kg)
What are two units for volume?
mL or cm3 (cubic centimeters)
You missed class yesterday. You walk into class and ask Ms. Austin what you missed. What will she say to you?
Have you looked at Canvas?
Definition is: to change into something else
transmutate (or any form of the word)
What is the definition of matter?
has mass and takes up space (or equivalent)
What piece of equipment do we use to find the volume of liquids?
graduated cylinder
What is the formula for density?
D = m/V
(capitalization matters)
You need scissors while in chem class. What should you do?
Walk over to one of the student supply drawers at the end of the lab benches and get some.
Hint: Do not talk to any students along the way or you might get banned from getting up ;)
Define and give at least one example of a physical property
Property of a substance that can be measured without changing its chemical nature.
Examples: mass, size, color, density (there are a lot more)
Name two things that are not matter
instructor approval
What is m the symbol for?
mass
The density of gold is 19.3 g/cm3. What is the volume of a 95 g block of gold?
4.9 cm3
You are tardy to chem class. What should avoid doing as you enter the classroom and get to your seat.
Do NOTHING that would disrupt the class--don't need to talk (you could apologize for being late); don't talk to classmates as you put your stuff in the cabinet and get to your seat
What is a piece of equipment you could use for heating?
Bunsen burner
This piece of glassware is used to mix, store and transport liquids.
full credit: Erlenmeyer flask
half credit: beaker
What is the name of the curve that liquid forms in a graduated cylinder?
meniscus
A glass marble has mass of 18.5 g and a density of 2.87g/cm3. What is the density of 6 marbles?
2.87 g/cm3. Density is an intensive property so it doesn't depend on the amount of matter present.
Can you turn in work after the deadline on Canvas?
No UNLESS it is due to a technical difficulty. However, you must document the difficulty at least 60 minutes before the deadline
Forgot to mention--deadlines are almost always 1:00 pm the day after something is assigned (~24 hours to complete)
Definition: a scientific statement based on evidence, prior knowledge and logic.
Subjective (not all scientists would agree with the statement)
Inference
We said that electricity is not matter. What is it?
energy
What is the name of the method used to find the volume of irregularly shaped objects, like a carrot?
Displacement method
(Will also accept a clear and complete description of the method)
Two objects have a mass of 5.0 g. Object A has a density of 2.7 g/cm3 and object B has a density of 8.4 g/cm3. Which object has a larger volume?
A.
The mass for object B is smooshed into a smaller space.
At the beginning of class, during the day's intro and at the end of the lesson during the wrap up.