Unit 0:Safety
Is horseplay allowed in a lab?
NO
What is an element?
1 type of atom (O, H, C...)
You boil water to make pasta, what type of change is it?
Physical
What is distance?
The total path length it takes from point A to B
What is convection
heat transfer through currents of heat rising and cool sinking in fluids (air/liquid)
Which of the following is a safe lab procedure?
A. Eating during a lab
B. Wearing baggy clothing
C. Listening to all directions before starting
D. Smelling directly into the container of chemicals
What is a compound?
1 or more different types of atoms (NH3, H2O, CaCO3...)
Bubbles are released when you add vinegar to backing soda, what kind of change is it?
Chemical
What is displacement?
What is conduction
heat transfer through direct contact
Report it to the teacher immediately
How many elements are in the compound:
CaCO3
3 elements
Ca, C, & O
You crack an egg into a bowl, what kind of change is it?
What is velocity?
What is radiation?
heat transfer through electro-magnetic waves
Do you cut away or towards yourself when cutting something?
Cut away from ones self
How many total atoms are in the compound:
CaCO3
5
Ca-1
C-1
O-3
You start a fire with wood, what kind of change is it?
Chemical
What is Newton's 1st Law?
Law of Inertia, an object will stay in motion unless stopped by an unbalanced force.
You place an ice cube on a bench outside (hot), and the ice cube melts. What type of heat transfer is this?
conduction (ice cube it directly touching the table)
You waft it towards your nose
How many atoms are in the compound:
2CaCO3
10
Ca-2
C-2
O-6
What kind of chemical change is it when garbage sits too long and sinks?
odor production
4m/s
(20m/5s)
The ocean has currents moving the water around, what kind of heat transfer is this?
convection (currents)